❤️ Health calculators

BMI, calories and body metrics.

Calculate your Body Mass Index (BMI) from your height and weight, in metric or imperial units.

Estimate your daily calorie needs (TDEE) and targets for losing or gaining weight, using the Mifflin-St Jeor equation.

Estimate your body fat percentage using the US Navy tape method, from a few simple body measurements.

Estimate a healthy target weight for your height using the Robinson, Miller, Devine and Hamwi formulas, plus the healthy BMI range.

Work out your running pace per kilometre and per mile from a distance and a time, plus your average speed.

Estimate how much water to drink each day based on your body weight and how much exercise you do.

Split a daily calorie target into grams of protein, carbohydrate and fat using a chosen macro ratio.

Find the best times to go to sleep or wake up, based on 90-minute sleep cycles.

Estimate a pregnancy due date from the first day of the last menstrual period, with current progress and trimester.

Calculate your waist-to-hip ratio (WHR) and see the associated health-risk category, based on WHO thresholds.

Find your maximum heart rate and target training zones for moderate and vigorous exercise, with an optional resting-heart-rate (Karvonen) adjustment.