Health & Fitness Calculators
14Health and fitness calculators built on evidence-based formulas: BMI, TDEE, body fat, 1RM, heart rate, water intake and due date. Metric or imperial.
BMI CalculatorCalculate your Body Mass Index (BMI) in metric or imperial units, see your weight category and the healthy weight range for your height.Calorie (TDEE) CalculatorCalculate your TDEE and daily calorie needs using the Mifflin–St Jeor equation, with targets for maintaining, losing or gaining weight.Body Fat CalculatorCalculate your body fat percentage using the US Navy method. Enter your waist, neck and height measurements in metric or imperial for an accurate estimate.Water Intake CalculatorCalculate your recommended daily water intake based on your body weight and activity level. Get results in litres, glasses and ounces.Target Heart Rate CalculatorCalculate your maximum heart rate and target heart rate zones for fat burning, cardio and peak intensity training using the Karvonen method.One-Rep Max CalculatorCalculate your one-rep max (1RM) for any lift using the Epley formula. Get a full training percentage table from 60% to 95% of your max.Pregnancy CalculatorCalculate your pregnancy due date from your last menstrual period (LMP) using Naegele's rule. See weeks pregnant, days remaining and trimester.BMR CalculatorCalculate your BMR, the calories your body burns at rest, using the Mifflin-St Jeor formula. Enter your age, sex, height and weight for an instant result.Ideal Weight CalculatorFind your ideal body weight from your height and sex using the Devine, Robinson and Hamwi formulas, plus the healthy weight range for a normal BMI.Running Pace CalculatorWork out your running pace per km and per mile from a distance and finish time, plus your speed and a split table for every kilometre.Calorie CalculatorFind out how many calories you should eat per day to maintain, lose or gain weight, based on your age, sex, height, weight and activity level.Sleep CalculatorFind the best time to go to bed or wake up, based on 90-minute sleep cycles. Wake up between cycles, not in the middle of one.Ovulation CalculatorEstimate your ovulation date, fertile window and next period based on the first day of your last period and your average cycle length.Macro CalculatorCalculate your daily protein, carb and fat targets in grams, based on your calorie needs and a diet style of your choice.