Health Calculators

Free macro calculator. Get your daily protein, carbs and fat targets based on your calories, goal and body — for cutting, maintenance or bulking.

Free running pace calculator. Find your pace per km and per mile, plus your speed, from a distance and finish time.

Free one rep max (1RM) calculator. Estimate the most weight you can lift for one rep, with a full percentage table for programming your training.

Free sleep calculator. Find the best times to go to bed or wake up based on 90-minute sleep cycles, so you wake up refreshed.

Free ovulation calculator. Find your most fertile days and estimated ovulation date from your last period and cycle length.

Free BMI calculator. Calculate your Body Mass Index in metric or imperial units and see your weight category and healthy weight range.

Free BMR calculator using the Mifflin-St Jeor equation. Find your Basal Metabolic Rate — the calories your body burns at rest.

Free calorie calculator. Find your daily calorie needs to maintain, lose or gain weight based on your age, size and activity level.

Free TDEE calculator. Calculate your Total Daily Energy Expenditure — the calories you burn per day including activity.

Free body fat calculator using the U.S. Navy method. Estimate your body fat percentage from tape measurements — no calipers needed.

Free ideal weight calculator using the Devine, Robinson and Hamwi formulas plus the healthy BMI range for your height.

Free water intake calculator. Find out how much water you should drink per day based on your weight and exercise level.

Free protein calculator. Find your optimal daily protein intake for muscle gain, fat loss or general health based on body weight and goals.

Free heart rate zone calculator. Find your maximum heart rate and training zones for fat burning, cardio and peak performance.

Free pregnancy due date calculator. Estimate your baby's due date from your last menstrual period using Naegele's rule.