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Health & Fitness Calculators

15 free tools in this category.

Check your Body Mass Index from height and weight and see your healthy weight range.

Estimate your daily calorie needs (BMR and TDEE) for maintaining, losing or gaining weight.

Estimate your ovulation day, fertile window and next period from your last period date and cycl

Estimate your due date and key pregnancy dates from your last period.

Estimate body fat percentage using the US Navy method (neck, waist, hip and height in inches).

Find the healthy weight range for your height using the BMI range 18.5–24.9.

Estimate your daily protein needs from body weight and activity level.

Calculate your waist-to-hip ratio, a quick indicator of health risk.

Estimate your one-rep max (1RM) using the Epley formula.

Split daily calories into protein, carbs and fat grams by your chosen percentages.

Estimate blood alcohol concentration (BAC) using the Widmark formula.

Calculate body surface area (BSA) using the Mosteller formula.

Estimate how much water you should drink daily based on body weight and exercise.

Estimate lean body mass (fat-free mass) using the Boer formula.

Find your maximum heart rate (220 − age) and training zones.