Calculators
436 free tools in this category.
Age Calculator
Find your exact age in years, months and days, plus total days, weeks and hours you have lived.
Scientific Calculator
A full scientific calculator with trigonometry, logarithms, powers, roots and more.
Percentage Calculator
Calculate percentages three ways: what is X% of Y, X is what percent of Y, and the percentage c
Love Calculator
A fun love compatibility percentage based on two names.
CGPA Calculator
Convert CGPA (10-point scale) to percentage and percentage back to CGPA.
Numerology Calculator
Calculate your Life Path number and numerology profile from your birth date.
Attendance Calculator
Check your attendance percentage and how many classes you must attend (or can miss) to reach yo
Time Duration Calculator
Find the exact duration between two times in hours, minutes and seconds.
Gold Loan Calculator
Calculate monthly EMI, total interest and a year-wise repayment schedule for your gold loan.
Date Difference Calculator
Calculate the difference between two dates in years, months, days, weeks and hours.
Discount Calculator
Find the sale price and how much you save after a percentage discount, including tax if needed.
Tip Calculator
Split a bill and tip fairly between any number of people.
Mileage Calculator
Calculate your vehicle’s mileage (fuel efficiency) from distance and fuel used.
Home Loan Eligibility Calculator
Find how much home loan you can get from your monthly income (FOIR method).
LCM Calculator
Find the Least Common Multiple (LCM) of two numbers.
Average Calculator
Find the mean (average) of a list of numbers, along with median, mode and more.
Ratio Calculator
Simplify any ratio to its lowest terms.
SGPA Calculator
Convert SGPA to CGPA and percentage using the standard formulas.
Marks Percentage Calculator
Calculate the percentage of marks obtained out of total marks.
Median Calculator
Find the median and other statistics of a list of numbers.
GPA Calculator
Calculate GPA from course grades and credit hours.
Fraction Calculator
Add, subtract, multiply and divide fractions, with simplified, mixed and decimal results.
Land Area Calculator
Calculate land area in square feet, square yards, square meters and acres.
Recurring Deposit Calculator
Calculate the maturity value of a Recurring Deposit (RD) with quarterly compounding.
Position Size Calculator
Calculate forex position size from account risk and stop loss.
Days Between Dates Calculator
Count the exact number of days between two dates.
Percentile Calculator
Find percentiles (25th, 75th, 90th) and full statistics of a data set.
Lot Size Calculator
Calculate forex lot size from risk and stop loss.
Pace Calculator
Calculate running or walking pace per km/mile and speed from distance and time.
Steel Weight Calculator
Calculate the weight of steel rods/bars (weight per meter = d²/162).
PSU Calculator
Estimate the PSU wattage a PC build needs.
Education Loan Calculator
Calculate monthly EMI, total interest and a year-wise repayment schedule for your education loa
Business Days Calculator
Count business days (Mon–Fri) between two dates, excluding weekends.
Aspect Ratio Calculator
Find the simplified aspect ratio of a resolution or screen size (e.g. 1920×1080 = 16:9).
Sample Size Calculator
Calculate the required survey sample size for a confidence level and margin of error.
Concrete Calculator
Estimate concrete volume and cement bags (M20 mix) for a slab or footing.
Matrix Calculator
Add, subtract, multiply matrices — plus determinant, inverse and transpose.
DPI Calculator
Calculate screen PPI/DPI from resolution and diagonal size.
Percentage Increase Calculator
Find the percentage increase between two numbers.
Resistance Calculator
Calculate electrical resistance from voltage and current.
Pip Calculator
Calculate the value of one pip for a forex trade.
Lucky Number Calculator
Find your Life Path number and lucky number from your date of birth (numerology).
Download Time Calculator
Estimate how long a file will take to download at your internet speed.
Battery Backup Calculator
Estimate how many hours a battery/inverter will run your load.
Solar Panel Calculator
Estimate how many solar panels you need for your daily electricity usage.
FIRE Calculator
Find how many years to reach financial independence (FIRE) from savings and investments.
Stair Calculator
Calculate steps and riser height for a staircase.
Combination Calculator
Calculate combinations C(n, r) — how many ways to choose r items from n.
YouTube Revenue Calculator
Estimate YouTube earnings from views and CPM range.
Paint Cost Calculator
Estimate paint needed and its cost for a wall or room area.
Carpet Area Calculator
Calculate carpet area of a room or flat.
Percentage Decrease Calculator
Find the percentage decrease between two numbers.
Dog Age Calculator
Convert your dog’s age into human years using the science-based formula 16·ln(age)+31.
Loan Interest Rate Calculator
Work out the interest rate of a loan from its amount, EMI and tenure.
VO2 Max Calculator
Estimate VO2 Max with the Rockport walking test.
Voltage Drop Calculator
Calculate voltage drop in a copper wire run.
Brick Calculator
Estimate bricks needed for a wall (standard modular bricks).
Cement Calculator
Calculate cement bags needed for concrete work.
Standard Deviation Calculator
Calculate standard deviation, variance, mean and median of a data set.
Density Calculator
Calculate density from mass and volume (density = mass ÷ volume).
Chess Rating Calculator
Calculate your expected score and new Elo rating after a game.
Pipe Weight Calculator
Estimate the weight of a steel pipe.
Courier Charge Calculator
Estimate courier charges by weight.
Ohm's Law Calculator
Calculate voltage, current, resistance and power with Ohm’s law.
GCD Calculator
Find the Greatest Common Divisor (GCD / HCF) of two numbers.
Loan Term Calculator
Find how long it will take to repay a loan from its amount, EMI and interest rate.
Pipe Volume Calculator
Calculate the volume of water a pipe can hold.
Water Tank Capacity Calculator
Calculate the capacity of a rectangular water tank in liters.
Concrete Slab Calculator
Calculate concrete needed for a slab.
Variance Calculator
Calculate variance, standard deviation and other statistics of a data set.
Prime Factorization Calculator
Break any number into its prime factors.
Standard Calculator
A free online standard calculator with scientific functions for everyday math.
Watt Calculator
Calculate power in watts from voltage and current.
Acceleration Calculator
Calculate acceleration from change in velocity over time.
Z-Score Calculator
Calculate the z-score of a value given the mean and standard deviation.
Screen Size Calculator
Find screen width and height from the diagonal size and aspect ratio.
Instagram Engagement Calculator
Calculate Instagram engagement rate from likes, comments and followers.
Margin Calculator (Forex)
Calculate required forex margin from lot size and leverage.
Zodiac Calculator
Find your zodiac (star) sign from your date of birth.
Aquarium Volume Calculator
Calculate aquarium water volume in liters and gallons.
Rent vs Buy Calculator
Compare the total cost of renting vs buying over a period.
Bitcoin Mining Calculator
Estimate Bitcoin mining profit from hashrate, power and BTC price (rough).
Sand Calculator
Calculate sand needed for concrete (M20 reference mix).
EBITDA Calculator
Calculate EBITDA from revenue and operating costs.
Unit Price Calculator
Compare unit prices to find the better deal.
Decimal to Fraction Calculator
Convert any decimal into a fraction.
Gear Ratio Calculator
Calculate gear ratio and output RPM.
Wire Size Calculator
Estimate the wire size (mm²) needed for a current and run length (copper, ≤3% drop at 230V).
Fuel Consumption Calculator
Calculate fuel consumption (L/100km or MPG) of a vehicle.
Cost of Living Calculator
Compare cost of living between major world cities (New York = 100).
Permutation Calculator
Calculate permutations P(n, r) — ordered arrangements of r items from n.
Rule of 72 Calculator
Use the Rule of 72 to find how fast money doubles at a given return.
Bond Yield Calculator
Estimate a bond’s yield to maturity (approximation).
Markup Calculator
Calculate selling price and markup from cost and markup %.
Reverse Tax Calculator
Extract the base price and tax from a tax-inclusive price.
Reading Time Calculator
Estimate reading time for any text (words ÷ 200 per minute).
Torque Calculator
Calculate torque from force and lever arm length.
Wavelength Calculator
Calculate wavelength from frequency (speed of light).
Battery Charging Time Calculator
Estimate how long a battery takes to charge.
Fertilizer Calculator
Calculate fertilizer from lawn size and bag analysis.
Down Payment Calculator
Calculate the down payment for a home or car from price and percentage.
Effective Interest Rate Calculator
Convert a nominal rate into the effective annual rate (EAR).
Dividend Yield Calculator
Calculate dividend yield of a stock.
Gross Profit Calculator
Calculate gross profit and gross margin.
Mode Calculator
Find the mode and full statistics of a data set.
Geometric Mean Calculator
Calculate the geometric mean of a set of numbers.
Linear Regression Calculator
Find the line of best fit (slope, intercept, R²) for data points.
Probability Calculator
Calculate probability from favorable and total outcomes.
Velocity Calculator
Calculate velocity from distance and time.
Frequency Calculator
Calculate frequency from wavelength.
LED Resistor Calculator
Find the resistor needed to safely power an LED.
Flight Time Calculator
Estimate flight time from distance (includes taxi/climb allowance).
House Affordability Calculator
Find what price of house you can afford from your income.
Payback Period Calculator
Find how long an investment takes to pay back its cost.
ROAS Calculator
Calculate Return on Ad Spend (ROAS).
Exam Score Calculator
Calculate your exam score as a percentage and grade.
Final Grade Calculator
Find the score you need in the final exam to reach your target grade.
Payroll Calculator
Calculate gross pay, deductions and net (take-home) pay.
Percent Error Calculator
Calculate percent error between experimental and true values.
Countdown Calculator
Count down to any date with a live timer.
Calories Burned Walking Calculator
Calories burned walking (about 0.53 kcal per kg per km).
Work Calculator
Calculate work done by a force over a distance.
Trip Cost Calculator
Estimate total trip cost: fuel, tolls and food.
Paint Calculator
Calculate paint needed for walls (use the wall area).
Wedding Budget Calculator
Split a wedding budget into the usual categories.
Cat Age Calculator
Convert your cat’s age into human years.
Paper Weight Calculator
Calculate the weight of paper: one sheet and a 500-sheet ream.
Retirement / SIP Calculator
Plan retirement with a monthly SIP — projected corpus at retirement.
Cashback Calculator
Calculate cashback earned on a purchase.
Current Ratio Calculator
Calculate the current ratio (liquidity) of a business.
Break-Even Point Calculator
Find the break-even point in units and revenue.
Hourly to Salary Calculator
Convert an hourly wage into yearly, monthly and weekly salary.
Salary to Hourly Calculator
Convert a yearly salary into an hourly wage.
Speaking Time Calculator
Estimate speaking/presenting time for a script.
BMR & TDEE Calculator
Calculate BMR and TDEE (daily calorie needs) with activity levels.
Target Heart Rate Calculator
Find your target heart rate zones for exercise.
Force Calculator
Calculate force with Newton’s second law (F = m × a).
Wind Load Calculator
Estimate wind load (pressure) on a structure from wind speed.
Tile Calculator
Calculate tiles needed for a floor or wall.
Flooring Calculator
Calculate flooring material and cost.
Swimming Pool Volume Calculator
Calculate swimming pool water volume.
Internet Speed Calculator
Find your internet speed from a download’s size and time.
Split Bill Calculator
Split a bill (with tax and tip) fairly between people.
Bond Price Calculator
Calculate the price of a bond from its coupon, yield and years to maturity.
Customer Lifetime Value Calculator
Calculate Customer Lifetime Value (CLV).
Weighted Average Calculator
Calculate the weighted average of values with weights.
Annual Salary Calculator
Calculate annual salary from monthly pay.
Calories Burned Running Calculator
Calories burned running (about 1.02 kcal per kg per km).
Kinetic Energy Calculator
Calculate kinetic energy of a moving object.
Pipe Flow Calculator
Calculate water flow rate in a pipe from diameter and velocity.
Tire Size Calculator
Calculate tire diameter and circumference from its size code.
EV Charging Cost Calculator
Calculate the cost of charging an electric vehicle.
Risk Reward Calculator
Calculate the risk-to-reward ratio of a trade.
Gravel Calculator
Calculate gravel needed for a driveway or path.
Asphalt Calculator
Calculate asphalt tonnage for a driveway.
AC BTU Calculator
Find the right AC size (BTU) for a room.
Economic Order Quantity Calculator
Calculate Economic Order Quantity (EOQ).
Normal Distribution Calculator
Calculate normal distribution probabilities and percentiles.
Calories Burned Cycling Calculator
Calories burned cycling at moderate pace.
Pace to Speed Calculator
Convert running pace (min/km) into speed (km/h).
Momentum Calculator
Calculate momentum (mass × velocity).
Inductance Calculator
Find the resonant frequency of an LC circuit.
Travel Budget Calculator
Plan a travel budget: stay, food, transport and activities.
Ethereum Mining Calculator
Estimate crypto mining profitability from hashrate and power cost.
CPU Bottleneck Calculator
Rough CPU/GPU balance check from benchmark scores.
Wall Area Calculator
Calculate the wall area of a room.
Mortgage Down Payment Calculator
Calculate a mortgage down payment and the loan amount.
Rental ROI Calculator
Calculate return on investment (ROI) of a rental property.
Fixed Deposit Maturity Calculator
Calculate FD maturity value with quarterly compounding.
Weighted Grade Calculator
Calculate a weighted grade from scores and weights.
Correlation Coefficient Calculator
Calculate the Pearson correlation coefficient between two data sets.
Confidence Interval Calculator
Calculate the confidence interval for a mean.
Baby Growth Calculator
Track baby growth: expected weight gain in the first year (rough guide).
Horsepower Calculator
Convert torque and RPM into horsepower.
Capacitance Calculator
Find the resonant frequency of an LC circuit from capacitance.
Inverter Size Calculator
Find the inverter size needed for your appliances.
Rebar Calculator
Estimate rebar needed for a concrete slab grid.
FOV Calculator
Calculate camera field of view from focal length.
Pixel Density Calculator
Calculate pixel density (PPI) of a display.
Loan Affordability Calculator
Find the loan amount you can afford from a monthly payment.
Property Appreciation Calculator
Estimate a property’s future value with yearly appreciation.
Refinance Calculator
See how much refinancing your loan can save you.
Financial Independence Calculator
Calculate your path to financial independence — years, target and savings rate.
Net Profit Calculator
Calculate net profit and net margin from revenue and all costs.
Cash Flow Calculator
Calculate net cash flow from inflows and outflows.
Semester Percentage Calculator
Convert semester GPA (SGPA) into percentage.
Harmonic Mean Calculator
Calculate the harmonic mean of a set of numbers.
Body Frame Size Calculator
Estimate body frame size from height and wrist circumference.
Step to Distance Calculator
Convert steps into distance and calories (average step 0.762 m).
Potential Energy Calculator
Calculate gravitational potential energy.
Paver Calculator
Calculate pavers needed for a patio or path.
Curtain Size Calculator
Calculate curtain panel sizes for a window.
Ceiling Fan Size Calculator
Find the ceiling fan size for a room by its area.
Focal Length Calculator
Calculate the focal length needed to frame a subject.
Mortgage Affordability Calculator
Find the mortgage you can afford from your monthly income.
Savings Goal Calculator
Find the monthly saving needed to reach a goal in time.
Sale Price Calculator
Calculate the sale price after a discount, plus your savings.
Business Valuation Calculator
Estimate a business value from profit and a market multiple.
Conversion Rate Calculator
Calculate conversion rate from visitors and conversions.
CPA Calculator
Calculate Cost per Acquisition (CPA).
Leave Balance Calculator
Calculate remaining leave days after taking some.
Credit Utilization Calculator
Calculate your credit card utilization ratio.
UPS Runtime Calculator
Estimate UPS runtime for your load.
Beam Load Calculator
Estimate the load a beam must carry from area and load per sq ft.
Mulch Calculator
Calculate mulch needed for garden beds.
Room Volume Calculator
Calculate the volume of a room.
kWh Cost Calculator
Calculate the cost of electricity in kWh.
Upload Time Calculator
Calculate how long an upload will take.
Monitor PPI Calculator
Calculate your monitor’s PPI.
Scale Factor Calculator
Calculate the scale factor between two sizes.
RAM Calculator
How much RAM does your PC need? Guide by usage type.
Burn Rate Calculator
Find a startup’s monthly burn rate and cash runway.
Startup Equity Calculator
Calculate founder equity after an investment round.
Overtime Pay Calculator
Calculate overtime pay at 1.5× your hourly rate.
Room Lighting Calculator
Calculate how much light (lumens) a room needs.
Rent Affordability Calculator
Find how much rent you can afford (30% rule) from your income.
Safety Stock Calculator
Calculate safety stock for reliable inventory levels.
Study Time Calculator
Plan study time: pages/chapters divided over days.
Swimming Pace Calculator
Calculate swimming pace per 100m from distance and time.
Generator Size Calculator
Find the generator size needed for your total load.
Deck Board Calculator
Calculate deck boards needed.
Wallpaper Calculator
Calculate wallpaper rolls needed.
Wallpaper Roll Calculator
Calculate wallpaper rolls from room size.
Debt Service Coverage Ratio Calculator
Calculate the Debt Service Coverage Ratio (DSCR).
Employee Cost Calculator
Calculate the true cost of an employee (salary + taxes + benefits).
YouTube CPM Calculator
Calculate YouTube earnings from views and CPM.
Compression Ratio Calculator
Calculate engine compression ratio.
Water Flow Rate Calculator
Calculate water flow rate from pipe size and velocity.
Balloon Payment Calculator
Calculate the final balloon payment of a balloon loan.
Credit Card Payoff Calculator
Find how long to pay off a credit card and the interest you will pay.
Roofing Calculator
Calculate roofing material for a roof.
Exposure Calculator
Calculate exposure value changes in stops.
Sound Delay Calculator
Calculate audio delay from speaker distance.
Cable Length Calculator
Calculate cable length with slack allowance.
Real Rate of Return Calculator
Find the inflation-adjusted (real) rate of return.
Current Yield Calculator
Calculate the current yield of a bond or dividend stock.
Cost Per Lead Calculator
Calculate cost per lead from ad spend and leads.
Cost Per Unit Calculator
Calculate cost per unit from total cost and units.
Profit Per Unit Calculator
Calculate profit per unit sold.
Email Marketing ROI Calculator
Calculate the ROI of an email marketing campaign.
Weekly Salary Calculator
Calculate weekly salary from a monthly or yearly amount.
Daily Wage Calculator
Calculate daily wage from a monthly salary.
Freelancer Hourly Rate Calculator
Find the hourly rate a freelancer must charge to hit a yearly target.
Freelancer Tax Calculator
Estimate tax on freelance income and what to set aside.
Daily Fiber Calculator
Recommended daily fiber: about 14 g per 1,000 calories eaten.
Fuel Savings Calculator
See fuel money saved by a more efficient vehicle or fewer km.
Compost Calculator
Calculate compost needed for a garden area.
Irrigation Calculator
Calculate irrigation water needed for a lawn or garden.
Stair Stringer Calculator
Calculate stair stringer dimensions.
Room Perimeter Calculator
Calculate room perimeter for skirting or trim.
Air Purifier Size Calculator
Find the air purifier CADR needed for a room.
LED Wattage Calculator
Convert lumens into LED wattage.
Cooking Time Calculator
Estimate roasting time by meat weight.
Classroom Capacity Calculator
Calculate classroom capacity from its area.
Pallet Load Calculator
Calculate pallet load: cases and total weight.
Appliance Wattage Calculator
Find appliance wattage from volts and amps.
Air Conditioner Running Cost Calculator
Calculate AC running cost per day and month.
Freight Cost Calculator
Calculate freight shipping cost.
Mortgage Recast Calculator
See your new EMI after a lump-sum payment (mortgage recast).
Closing Cost Calculator
Estimate closing costs on a home purchase (typically 2–5% of price).
Lease vs Buy Calculator
Compare total cost of leasing vs buying a car.
College Savings Calculator
Find the monthly saving needed for a child’s college fund.
Vacation Savings Calculator
Find how much to save monthly for your dream vacation.
Dividend Payout Ratio Calculator
Calculate the dividend payout ratio of a company.
Operating Margin Calculator
Calculate operating margin of a business.
Contribution Margin Calculator
Calculate contribution margin per unit and ratio.
Debt to Equity Calculator
Calculate the debt-to-equity ratio.
Debt Ratio Calculator
Calculate the debt ratio of a company or person.
Interest Coverage Ratio Calculator
Calculate the interest coverage ratio.
Operating Cash Flow Calculator
Calculate operating cash flow from net income and adjustments.
Revenue Growth Calculator
Calculate revenue growth rate between two periods.
Sales Forecast Calculator
Forecast future sales from current sales and growth rate.
Sales Target Calculator
Find the daily/weekly sales needed to hit a target.
Customer Acquisition Cost Calculator
Calculate Customer Acquisition Cost (CAC).
Social Media ROI Calculator
Calculate the ROI of social media marketing.
Customer Retention Rate Calculator
Calculate customer retention rate.
Inventory Turnover Calculator
Calculate inventory turnover ratio and days to sell.
Inventory Carrying Cost Calculator
Calculate the yearly cost of holding inventory.
Break-Even Units Calculator
Calculate the units you must sell to break even.
School Grade Calculator
Find your grade (A+ to F) from marks percentage.
Shift Hours Calculator
Calculate total hours between shift start and end (with break).
Sales Commission Calculator
Calculate sales commission from sales and commission rate.
Binomial Probability Calculator
Calculate binomial probabilities P(X = k).
Resting Heart Rate Calculator
Check your resting heart rate category.
Healthy Weight Range Calculator
Find the healthy weight range (BMI 18.5–24.9) for your height.
Daily Carb Intake Calculator
Daily carbs from calories and carb percentage.
Daily Fat Intake Calculator
Daily fat grams from calories and fat percentage.
Centripetal Force Calculator
Calculate centripetal force for circular motion.
Fuse Size Calculator
Find the right fuse size for an electrical load.
Snow Load Calculator
Estimate snow load on a roof from snow depth and type.
Column Load Calculator
Estimate axial load on a column from floor area and floors.
Gaming Sensitivity Calculator
Convert mouse sensitivity into cm per 360° turn.
Concrete Block Calculator
Estimate concrete blocks for a wall.
Tile Grout Calculator
Estimate tile grout needed for an area.
Topsoil Calculator
Calculate topsoil needed for a garden or lawn.
Garden Soil Calculator
Calculate soil for a raised garden bed.
Sod Calculator
Calculate sod rolls needed for a lawn.
Lawn Area Calculator
Calculate your lawn area.
Drywall Calculator
Estimate drywall sheets for a room.
Plywood Sheet Calculator
Calculate plywood sheets needed for an area.
Insulation Calculator
Estimate insulation material for an area.
Fence Calculator
Estimate fence posts and pickets.
Fence Material Calculator
Calculate fence materials: posts, rails and boards.
Fence Post Calculator
Calculate fence posts needed.
Deck Material Calculator
Estimate deck materials.
Ceiling Area Calculator
Calculate ceiling area.
Window Area Calculator
Calculate window glass area.
Ceiling Paint Calculator
Calculate ceiling paint needed.
Heater Size Calculator
Find the heater size needed for a room.
Refrigerator Size Calculator
Find the right refrigerator size for your family.
Speaker Distance Calculator
Calculate sound delay and speaker distance settings for home theater.
Tree Height Calculator
Measure a tree’s height from distance and the angle to its top.
Pizza Size Calculator
Calculate how many pizzas to order.
Party Budget Calculator
Plan a party budget per guest.
Event Cost Calculator
Calculate total event cost and cost per guest.
Warehouse Space Calculator
Calculate warehouse space needed for inventory.
Packaging Cost Calculator
Calculate packaging cost for a product run.
Luggage Weight Calculator
Check your luggage weight against the airline limit.
Backpack Weight Calculator
Find a healthy backpack weight for hiking.
Horse Feed Calculator
Calculate daily horse feed from body weight.
Pet Food Calculator
Calculate your pet’s daily calorie needs.
Appliance Running Cost Calculator
Calculate what an appliance costs to run.
Home Energy Usage Calculator
Estimate your home’s total energy usage and bill.
Computer Electricity Cost Calculator
Calculate computer electricity cost.
Laptop Battery Life Calculator
Estimate laptop battery life from capacity and power draw.
Internet Data Usage Calculator
Estimate monthly internet data usage.
Cloud Storage Cost Calculator
Calculate cloud storage cost.
File Compression Ratio Calculator
Calculate file compression ratio and space saved.
Depth of Field Calculator
Calculate depth of field for a camera lens.
Banner Size Calculator
Calculate print-ready pixel size for a banner.
Cycling Power Calculator
Estimate cycling power (watts) from speed and weight on flat ground.
Used Car Cost Calculator
Calculate the true yearly cost of owning a used car.
Vehicle Loan Affordability Calculator
Find the vehicle loan you can afford monthly.
Loan to Value (LTV) Calculator
Calculate Loan-to-Value (LTV) ratio of a mortgage.
Debt Payoff Calculator
Find how long to clear a debt with fixed monthly payments.
Extra Payment Savings Calculator
See how much interest extra monthly payments save on a loan.
Loan Interest Comparison Calculator
Compare two loans side by side — EMI and total interest.
NPV & IRR Calculator
Calculate Net Present Value (NPV) and Internal Rate of Return (IRR) of an investment.
Savings & Investment Calculator
Project savings growth with monthly deposits and compound interest.
Inflation Adjusted Price Calculator
Find what a price from the past equals today after inflation.
Return on Assets (ROA) Calculator
Calculate Return on Assets (ROA).
Return on Equity (ROE) Calculator
Calculate Return on Equity (ROE).
Economic Value Added (EVA) Calculator
Calculate Economic Value Added (EVA).
Bulk Discount Calculator
Calculate total cost with quantity (bulk) discount tiers.
Coupon Savings Calculator
Calculate savings from a coupon code.
Cashback vs Discount Calculator
Compare cashback vs instant discount — which saves more?
Invoice Total Calculator
Calculate an invoice total with discount and tax.
Quick Ratio Calculator
Calculate the quick ratio (acid test) of a business.
Runway Calculator
Calculate how many months a startup’s cash will last.
Customer Churn Rate Calculator
Calculate customer churn rate.
Inventory Value Calculator
Calculate the total value of inventory in stock.
Inventory Shrinkage Calculator
Calculate inventory shrinkage from theft, damage or errors.
Inventory Turn Days Calculator
Find how many days inventory lasts (turn days).
Break-Even Sales Calculator
Calculate the sales revenue needed to break even.
Weighted GPA Calculator
Calculate weighted GPA from grades and credits.
Required Exam Score Calculator
Calculate the exam score required to reach your target.
Attendance Percentage Required Calculator
Find how many classes you must attend to reach the required attendance.
Study Hours Planner Calculator
Plan daily study hours across subjects.
Pages Per Day Calculator
Find how many pages to read daily to finish a book in time.
Reading Progress Calculator
Track your reading progress through a book.
Working Days Salary Calculator
Calculate salary for the days actually worked.
Salary / Take-Home Pay Calculator
Calculate take-home pay after tax and deductions.
Double Time Pay Calculator
Calculate pay with double-time (2×) hours.
Night Shift Pay Calculator
Calculate pay including a night-shift differential.
Shift Differential Pay Calculator
Calculate shift differential pay on top of base pay.
Freelance Project Profit Calculator
Calculate profit on a freelance project.
Client Retainer Calculator
Calculate retainer value: hours included and effective rate.
Hourly Billing Calculator
Calculate a client bill from hours and rate, with tax.
Interquartile Range Calculator
Find the IQR, quartiles and full statistics of a data set.
Ideal Sleep Duration Calculator
Find your ideal bedtime from wake-up time using 90-minute sleep cycles.
TikTok Engagement Calculator
Calculate TikTok engagement rate from views, likes, comments and shares.
Extension Cord Load Calculator
Check the load (amps) you are putting on an extension cord.
Tank Filling Time Calculator
Find how long a tank takes to fill at a given flow rate.
Fuel Split Calculator
Split a fuel bill fairly between passengers.
Motorcycle Fuel Cost Calculator
Calculate motorcycle trip fuel cost.
Road Trip Fuel Budget Calculator
Budget the fuel for a road trip.
EV vs Petrol Cost Calculator
Compare yearly running cost: EV vs petrol car.
XP Calculator
Calculate total XP needed to reach a Minecraft level.
Minecraft Circle Calculator
Dimensions for building a circle in Minecraft (blocks).
Gravel Coverage Calculator
Find how much area a ton of gravel covers.
Sand Coverage Calculator
Find the area sand bags will cover.
Topsoil Coverage Calculator
Find the coverage of topsoil per yard.
Garden Bed Calculator
Plan a raised garden bed: soil and planting capacity.
Lawn Seed Calculator
Calculate lawn seed needed (new lawn or overseeding).
Seed Spacing Calculator
Calculate how many plants fit in a bed at a spacing.
Rainfall Collection Calculator
Calculate rainwater you can harvest from a roof.
Rain Gutter Capacity Calculator
Estimate gutter capacity needed for roof runoff.
Built-up Area Calculator
Estimate built-up and super built-up area from carpet area.
Super Built-up Area Calculator
Estimate super built-up area from carpet area.
Door Area Calculator
Calculate door area (for painting or material).
Driveway Area Calculator
Calculate driveway area.
Room Paint Cost Calculator
Calculate the full cost of painting a room.
Rice Cooking Calculator
Calculate water for perfect rice, by rice type.
Pasta Portion Calculator
Calculate how much pasta to cook per person.
Coffee Ratio Calculator
Calculate brew water from the golden coffee ratio.
Cake Serving Calculator
Estimate servings from a round layer cake.
Drink Quantity Calculator
Calculate drinks needed for a party.
Party Food Quantity Calculator
Estimate food quantities for a party.
Air Fryer Cooking Time Calculator
Convert oven recipes into air fryer time and temperature.
Microwave Power Calculator
Convert microwave cooking times between wattages.
Wedding Seating Calculator
Calculate tables needed for wedding seating.
Hotel Cost Calculator
Calculate total hotel stay cost with taxes.
Project Cost Calculator
Estimate a project’s total cost.
Occupancy Load Calculator
Calculate the occupant load of a space.
Library Shelf Space Calculator
Calculate shelf space needed for books.
Storage Box Capacity Calculator
Calculate the capacity of a storage box.
Warehouse Capacity Calculator
Estimate warehouse storage capacity.
Carton Capacity Calculator
Calculate how many items fit in a carton.
Packaging Weight Calculator
Calculate packed weight for shipping.
Refrigerator Energy Cost Calculator
Calculate refrigerator energy cost.
Washing Machine Running Cost Calculator
Calculate washing machine running cost.
TV Electricity Cost Calculator
Calculate TV electricity cost.
Smartphone Charging Cost Calculator
Find how little it costs to charge a phone.
Water Heating Cost Calculator
Calculate the cost of heating water.
Light Bulb Savings Calculator
Calculate yearly savings from switching to LED bulbs.
Video Streaming Data Calculator
Calculate data used by video streaming.
Music Streaming Data Calculator
Calculate data used by music streaming.
Memory Card Capacity Calculator
Calculate how many photos fit on a memory card.
Circle of Confusion Calculator
Calculate the circle of confusion for a sensor size.
Camera Megapixel Calculator
Calculate megapixels from image resolution.
Printer DPI Calculator
Calculate print resolution (DPI) for an image size.
Screen Viewing Distance Calculator
Find the best viewing distance for a TV or monitor.
YouTube Thumbnail Ratio Calculator
Check a thumbnail’s aspect ratio (YouTube standard is 16:9 = 1280×720).
Hiking Time Calculator
Estimate hiking time with Naismith’s rule.
Printer Ink Cost Calculator
Calculate printer ink cost per page.
Ink Usage Calculator
Estimate ink usage from page coverage.
Copy Paper Requirement Calculator
Calculate paper needed for copies.
Business Card Quantity Calculator
Calculate business cards to order.
Banner Printing Cost Calculator
Calculate banner printing cost.
Sticker Printing Cost Calculator
Calculate sticker printing cost.
Label Printing Cost Calculator
Calculate label printing cost.
Price to Book (P/B) Ratio Calculator
Calculate the Price-to-Book (P/B) ratio.
Car Loan / Auto Loan Calculator
Calculate monthly EMI, total interest and a year-wise repayment schedule for your car loan / au
Inventory Profit Calculator
Calculate profit from inventory sold.
Mulch Depth Calculator
Find the mulch depth a volume gives over an area.
Price to Earnings (P/E) Ratio Calculator
Calculate the Price-to-Earnings (P/E) ratio.
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