At 80kg the BMI runs from 35.6 at 150cm to 20.0 at two metres — a spread of 15.6 points. Fifteen points is more than the entire healthy band is wide. A weight quoted without a height therefore carries less information than the category it is being used to determine, which is a reasonable summary of why BMI divides by ..
= 5ft 8.9in
YOUR RESULTS
BODY MASS INDEX
26.1
Overweight
BMI PRIME
1.04
Normal = 0.74–1.00
PONDERAL INDEX
14.9
kg/m³
HEALTHY WEIGHT RANGE
56.7 – 76.3 kg
Lose 3.7 kg to reach healthy weight
Above healthy range. Lifestyle changes may reduce health risks.
BMI GAUGE
YOUR POSITION
FULL SUMMARY
WHO BMI CATEGORIES
The weight is already set to 80kg, which is about 176 pounds. Enter your height and the BMI follows — until you do, the figure is undetermined.
Both unit systems are seeded, so switching between kilograms and pounds keeps the same weight rather than reverting to a default.
Read the band of heights rather than any single BMI. At 80kg the healthy band runs 179 to 208cm, and that band is what a weight actually determines.
A reading near a category boundary should be read as near a boundary. Most people vary by one to two kilograms across a day from food and fluid alone.
At 80kg — about 176 pounds — the BMI is undetermined until a height is supplied. At 150cm it is 35.6, at 175cm 26.1, and at 200cm 20.0: a spread of 15.6 points from one unchanged weight, which is wider than the entire healthy band. Inverting the formula gives what a weight can determine: 80kg sits inside the healthy BMI band for heights between 179cm and 208cm, a window 29cm wide, or roughly 5ft 11in to 6ft 10in. On the WHO 2004 cut-offs for South and East Asian populations the shortest suitable height rises to 187cm, because those thresholds lower the top of the BMI band while leaving 18.5 in place.
FORMULA REFERENCE TABLE
| Name | Formula | Description |
|---|---|---|
| BMI (Metric) | BMI = weight(kg) / height(m)² | Divide weight in kg by height in metres squared |
| BMI (Imperial) | BMI = 703 × weight(lbs) / height(in)² | Multiply weight in pounds by 703, divide by height in inches squared |
| Height in metres | h(m) = h(cm) / 100 | Convert centimetres to metres before squaring |
| BMI Prime | BMI Prime = BMI / 25 | Ratio of BMI to upper limit of normal (25). Values >1.00 indicate overweight |
| Ponderal Index | PI = weight(kg) / height(m)³ | More accurate than BMI for very tall or short individuals. Normal: 11–15 kg/m³ |
| Healthy weight | w = BMI × height(m)² | Rearranged BMI formula: weight(kg) for any target BMI at your height |
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Last updated: August 2, 2026 · Formula verified by EagleCalculator team · Source: WHO Global Database on Body Mass Index · Eagle-eyed accuracy for every calculation.