Body & Health Calculator

BMI with WHO and Asian ranges, body-fat estimate, ideal weight and waist-to-height ratio — with your healthy weight range.

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Your measurements

Weight

Height

Neck

Waist

Measure with the tape flat and snug, breathing out normally: the neck just below the Adam’s apple, the waist at your belly button.

Body mass index (BMI)

22.2 kg/m²

Healthy weight

on the WHO scale

Your result under both standards
Measure	WHO	Asian
Your category	Healthy weight	Healthy weight
Healthy BMI	18.5–24.9	18.5–22.9
Healthy weight at 175 cm	56.7–76.3 kg	56.7–70.1 kg
Your weight	Within the range	Within the range

BMI Prime: 0.89

Your BMI divided by 25, the top of the WHO healthy range. Under 0.74 is underweight, and 1.00 or more is above the healthy range.

How it’s calculated

BMI is your weight in kilograms divided by your height in metres, squared: 68.0 ÷ 1.75² = 22.2.

BMI categories

BMI ranges for each category, WHO and Asian
Category	WHO	Asian
Underweight	Under 18.5	Under 18.5
Healthy weight	18.5–24.9 You	18.5–22.9 You
Overweight	25–29.9	23–24.9
Obese (class I)	30–34.9	25–29.9
Obese (class II)	35–39.9	30 or more
Obese (class III)	40 or more	Not used

The Asian ranges come from the WHO Western Pacific Region (2000), which set lower cut-offs because health risks start at a lower BMI for many Asian people.

Body fat estimate

16.2%

Fitness

US Navy tape method, men’s categories

Fat mass: 11.0 kg
Lean mass: 57.0 kg

Body fat categories for men
Category	Body fat
Essential fat	2–5%
Athletes	6–13%
Fitness You	14–17%
Average	18–24%
Obese	25% or more

A tape estimate, usually within a few percentage points of a lab scan. Categories are from the American Council on Exercise.

Waist-to-height ratio

0.48

Healthy

Your waist divided by your height

Keep your waist to less than half your height: for you, that’s under 87.5 cm.

Waist-to-height ratio categories
Category	Ratio
Below the usual range	Under 0.4
Healthy You	0.4–0.49
Increased health risk	0.5–0.59
High health risk	0.6 or more

Bands from NICE, the UK’s health guidance body (2022). The ratio works the same in centimetres or inches.

Ideal weight

68.7–70.5 kg

Range of three formulas

For a man 175 cm tall

Ideal weight by formula
Formula	Ideal weight
Devine (1974)	70.5 kg
Robinson (1983)	68.9 kg
Miller (1983)	68.7 kg
Healthy BMI range (WHO)	56.7–76.3 kg

These formulas date from the 1970s and 80s and were made for working out medicine doses, so treat them as a rough guide; the healthy BMI range is wider and allows for build.

These numbers are screening estimates, not a diagnosis, and they aren’t meant for anyone under 18 or during pregnancy, so talk to a doctor about your own health.

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