Health Calculators

Calculate Body Mass Index with the WHO classification, healthy weight range and BMI Prime, in metric or…

Estimate your daily calorie needs (BMR and TDEE) with the Mifflin-St Jeor equation, adjust for your goal, and…

Find your basal metabolic rate — the calories your body burns at complete rest.

Calculate total daily energy expenditure and the calorie targets for cutting, maintaining or bulking.

Estimate body fat percentage with the US Navy tape method and see your fat and lean mass in kg.

Compare four classic ideal-body-weight formulas (Devine, Robinson, Miller, Hamwi) for your height.

Calculate lean body mass from weight and height using the Boer formula.

See the healthy weight range for your height and how far your current weight sits from it.

Work out how much water to drink per day from your weight, activity and the climate you live in.

Find your daily protein target in grams based on weight, activity and your goal.

Split your daily calories into protein, carbohydrate and fat grams for your chosen goal.

Estimate the due date, current week of pregnancy and each trimester from your last period.

Find your likely ovulation day and fertile window from your last period and cycle length.

Calculate maximum heart rate and the five training zones for fat burn, endurance and VO2 max work.

Classify a blood pressure reading and see pulse pressure and mean arterial pressure.

Estimate your 1RM from any set and get the working weights for 60–95% of it.

Convert distance and finish time into pace per km, per mile and average speed.

Calculate calories burnt running at any pace and duration.

Calculate calories burnt cycling by speed and time.

Calculate calories burnt walking, from a stroll to a brisk hill climb.

Estimate blood alcohol concentration from drinks, body weight and time using the Widmark formula.

Calculate body surface area with the Du Bois and Mosteller formulas used for clinical dosing.

Check your waist-to-hip and waist-to-height ratio and the health risk band they fall into.

Check a child's BMI-for-age and estimate their adult height from the parents' heights.