· health
Estimate your body fat from a few tape measurements, your waist alone, or your BMI, and see where it sits in the healthy range for your age and sex.
Health
Calculators for everyday health numbers, such as your body mass index, how many calories you need a day and your body fat percentage. Type in metric or imperial units and the result updates as you go, drawn on a scale or a body figure so you can see where you sit.
Each tool shows the formula behind its number and lists the research it comes from, so you can check the math yourself. The results are screening estimates for adults, and every page says who its formula suits and where it falls short. If a result worries you, talk to a doctor.
The calculators run in your browser, so your measurements stay on your device.
3 public tools
Estimate your body fat from a few tape measurements, your waist alone, or your BMI, and see where it sits in the healthy range for your age and sex.
Work out your body mass index from your height and weight, see where it falls on the adult BMI scale, and the healthy weight range for your height.
Work out how many calories you need a day to keep, lose or gain weight, using the 2023 National Academies equations, and see where that energy goes.