⚖️Weight & Body Composition Calculators

Weight and body composition calculators — BMI, ideal body weight, body fat

This wizard combines three of the most popular weight calculators: BMI calculator, ideal body weight calculator, and body fat calculator. All in one place — no registration, no ads, no data sent to a server.

BMI calculator computes the Body Mass Index according to the WHO formula and instantly classifies the result (underweight, normal weight, overweight, obesity). Ideal body weight calculator provides the optimal weight range for your height and sex using the Devine and Hamwi formulas. Body fat calculator estimates body fat percentage from body circumferences using the Deurenberg method — no specialist equipment needed.

Indicative results

All calculations are performed locally in your browser — no data leaves your device. Results are indicative and do not replace advice from a doctor or dietitian. If you have concerns about your weight or body composition, consult a specialist.

Frequently asked questions

How does BMI differ from body fat percentage?

BMI (Body Mass Index) is the ratio of body weight to the square of height — a quick indicative measure. Body fat percentage (%BF) also considers sex and body circumferences, giving a more accurate picture of body composition. People with high muscle mass can have a high BMI with a low %BF.

How is ideal body weight calculated?

Ideal body weight (IBW) is an estimated optimal weight for a given height and sex. The most popular formulas are Devine and Hamwi — our calculator uses both and shows a range. The result is indicative; individual needs may vary depending on body frame.

Are the weight calculator results reliable?

Results are indicative and based on established scientific formulas (WHO, Devine, Deurenberg). They do not replace medical examinations or consultations with a dietitian who can account for your individual health situation.