Ideal Weight & Body Fat

Your healthy weight range, and body fat from a tape

calendar_today Last updated: September 1, 2026

You

Sex

Height (cm)

Weight (kg)

With a tape measure

Optional, and the only part of this page that can tell muscle from fat. Measure the neck below the larynx, the waist across the navel at the end of a normal breath out, and the hips at their widest.

Neck (cm)

Waist (cm)

Your healthy range

A BMI of 18.5 to 24.9, at your height

56.7 – 76.3 kg

You are at 25.5

The classical formulas

Devine (1974)built for drug dosing: 70.5 kg
Robinson (1983)a revision of Devine: 68.9 kg
Miller (1983)another revision: 68.7 kg
Hamwi (1964)built for insulin dosing: 72.0 kg

They disagree by 3.3 kg at your height. Each was built for dosing medicine, not for deciding what anyone should weigh — which is why the range above is the answer and these are the footnote.

Add the tape measurements and this becomes the useful half: body fat is what tells a muscular build from a heavy one, and no height-and-weight number can.

The range comes from the WHO BMI bands, which apply to adults; in children and teenagers weight is read against age-and-sex percentile charts instead. Body fat is the US Navy tape method (Hodgdon–Beckett 1984), accurate to within three or four points and less so at the extremes. Screening figures, not a diagnosis.

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