HEALTH & WELLBEING
Health and fitness calculators
Free health calculators for BMI, body fat, daily calories, water intake, running pace and sleep cycles. Each page explains its method, inputs and limits.
6 tools to exploreCHOOSE YOUR STARTING POINT
BMI calculatorEssentialBMI calculator for adults: work out your body mass index from height and weight in metric or imperial units, with the NHS weight category and healthy range.Calorie calculatorCalorie calculator: estimate how many calories you need a day to maintain, lose or gain weight from your age, sex, height, weight and activity level.Pace calculatorPace calculator: work out your running pace per kilometre and per mile and your average speed from any distance and finish time.Sleep calculatorSleep calculator: find the best time to go to bed so you wake at the end of a 90-minute sleep cycle, based on when you need to get up.Body fat calculatorBody fat calculator: estimate your body fat percentage, fat mass and lean mass from your height, weight and tape-measure readings using the US Navy method.Water intake calculatorWater intake calculator: estimate how much water to drink each day based on European Food Safety Authority guidance, including in pregnancy and breastfeeding.
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IN THIS COLLECTION
Planned health and fitness calculators
Calculators we're building next in this category.
- 01Tdee calculatorPlanned
- 02Calorie deficit calculatorPlanned
- 03Bmr calculatorPlanned
- 04Bra size calculatorPlanned
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- 061rm calculatorPlanned
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- 08Height calculatorPlanned
- 09Macro calculatorPlanned
- 10Protein calculatorPlanned
- 11Alcohol unit calculatorPlanned
- 12Ideal weight calculatorPlanned
- 13Bac calculatorPlanned
- 14Bmi calculator childPlanned
- 15Food calorie calculatorPlanned
- 16Ffmi calculatorPlanned
- 17Life expectancy calculatorPlanned
- 18Body shape calculatorPlanned
- 19Calories expended calculatorPlanned
- 20Percentile calculatorPlanned
- 21Max heart rate calculatorPlanned
- 22Vo2 max calculatorPlanned
- 23Waist and height ratio calculatorPlanned
- 24Bsa calculatorPlanned
- 25Heart rate zone calculatorPlanned
- 26Rpe calculatorPlanned
- 27Waist to hip ratio calculatorPlanned
- 28Nhs weight calculatorPlanned
- 29Ring size calculatorPlanned
- 30Run distance calculatorPlanned
- 31Weight loss percentage calculatorPlanned
- 32Penis size calculatorPlanned
- 33Weight gain calculatorPlanned
- 34Zone 2 heart rate calculatorPlanned
- 35Age grade calculatorPlanned
- 36Body recomposition calculatorPlanned
- 37Condom size calculatorPlanned
- 38Dots calculatorPlanned
- 39Fibre calculatorPlanned
- 40Caffeine calculatorPlanned
- 41Carb calculatorPlanned
CALCULATOR INPUTS AND METHODS
Health calculator inputs and methods
Choose the calculation that matches your question and the inputs you have. Each calculator in the health and fitness calculators collection explains its inputs, method and result limitations.
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