Health Calculators

BMI plus the healthy weight range for your height: enter height and weight in metric or imperial units, and it works out your BMI, places it in the standard or Asian-cutoff band, converts that band into a weight range for your exact height, and shows how much to lose or gain to reach it, plus BMI prime. It does not measure body fat, muscle, or health on its own — and it is estimates only, not medical advice.

Because health risks rise at lower BMIs in Asian populations, according to the WHO expert consultation. The healthy band ends at 22.9 instead of 24.9, overweight starts at 23, and obese at 27.5. The BMI itself is identical under either set; only the band it falls in changes.

BMR, TDEE, a deficit target, and a goal date: enter age, sex, height, and weight in metric or imperial units plus your activity level, and it works out your BMR with the Mifflin-St Jeor equation, multiplies it by your activity factor for maintenance calories, applies your chosen deficit for a daily target, and estimates how long to your goal weight. Targets below 1,200 kcal/day get a warning, and everything is estimates only, not medical advice.

BMI divided by 25 — the top of the standard healthy band. A prime of 0.91 (the 70 kg at 1.75 m example) sits inside the healthy band; a prime of 1.00 is exactly BMI 25; a prime of 1.20 is BMI 30, the obese threshold. It is a compact way to say how far above or below the healthy ceiling a BMI sits.