BMI
Your body mass index, your WHO category, the healthy weight range for your height and the waist-to-height…
Health calculators
BMI, ideal weight, calories, basal metabolism, body fat and pregnancy.
Tools in this category
Calories
The calories you need a day to lose fat, maintain or build muscle, and the split of protein, fat and…
Ideal weight
Four classic formulas plus the healthy range from BMI.
BMR calculator
The calories your body burns at rest, with Mifflin-St Jeor, Harris-Benedict, Katch-McArdle and Cunningham…
TDEE
Your total daily calorie burn for your activity level, and the calories to lose fat or gain weight, with…
Pregnancy weeks
Gestational age in weeks and days, trimester and estimated due date.
Due date
Estimated due date from your last period, conception, an ultrasound or IVF, with your weeks pregnant and…
Water intake
Recommended litres based on your weight, exercise and climate.
Ovulation
Estimated ovulation day and fertile window from your cycle, with an adjustable luteal phase and a calendar…
Heart rate zones
Your maximum heart rate and your five training zones using the Karvonen method, with the formula of your…
Body fat
US Navy method estimate from your body circumferences.
Protein
The grams of protein you need for your weight and profile: low activity, active, strength or fat loss, or…
1RM calculator
Estimate what you could lift for a single rep from one set, with seven formulas and a table of loads by…
Running pace
Your pace per kilometre or mile, the time or distance you are missing, splits and predicted 5K, 10K, half…
Health
The formulas used here (Mifflin-St Jeor, Harris-Benedict, US Navy, Naegele's rule) are the ones in routine clinical use, and each page states which one it applies.
They are statistical estimates for healthy adults: they do not replace a medical assessment and cannot account for individual conditions.