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Weight and Body Calculators
Check your BMI, find a healthy weight for your height and estimate body fat from a few tape measurements, with the formula and sources on each page.
Nothing you enter leaves your device.
Results are estimates for general information only, not medical advice.
All weight and body tools
- Weight & Body
BMI Calculator
Estimate body mass index from height and weight in metric or imperial units.
- Weight & Body
Ideal Body Weight Calculator
Find a healthy weight range for your height, with four classic formulas.
- Weight & Body
Body Fat Calculator
Estimate your body fat percentage from a few tape measurements.
- Weight & Body
Waist-to-Height Ratio Calculator
Divide your waist by your height and see whether it is under the advised limit of 0.5.
- Weight & Body
Waist-to-Hip Ratio Calculator
Compare your waist and hip measurements with the WHO reference for men and women.
- Weight & Body
Lean Body Mass Calculator
Estimate the weight of everything except fat from your height, weight and sex.
Good to know
Frequently asked questions
Which calculator should I start with?
BMI is the quickest check. Body fat and waist measurements add detail, because two people with the same BMI can carry very different amounts of fat.
Do these calculators work for children?
No. They use adult ranges. Children and teenagers need growth charts for their age and sex.
Are these calculators medical advice?
No. They give estimates for general information, using the published formulas named on each page. For decisions about your health, talk to a doctor or another qualified professional.
Is anything I enter stored or sent?
No. Every calculator runs in your browser. Nothing you type is saved, sent to a server or used for advertising.
Can I use these calculators on a phone?
Yes. Every calculator works in a phone browser, with metric or imperial units where it applies, and with the number format of your language.