At 120kg the BMI is 39.2 at 175cm, 33.2 at 190cm and 30.0 at two metres. Above 30 the WHO subdivides: class I from 30 to 34.9, class II from 35 to 39.9, and class III at 40 and above. The subdivision exists because a single label had stopped being informative across so wide a span — a BMI of 31 and one of 45 were bein..
= 5ft 8.9in
YOUR RESULTS
BODY MASS INDEX
39.2
Obese Class II
BMI PRIME
1.57
Normal = 0.74–1.00
PONDERAL INDEX
22.4
kg/m³
HEALTHY WEIGHT RANGE
56.7 – 76.3 kg
Lose 43.7 kg to reach healthy weight
Severely obese. Significant health risks. Medical guidance strongly recommended.
BMI GAUGE
YOUR POSITION
FULL SUMMARY
WHO BMI CATEGORIES
The weight is already set to 120kg, which is about 265 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 120kg the healthy band runs 220 to 255cm, 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 120kg — about 265 pounds — the BMI is undetermined until a height is supplied. At 150cm it is 53.3, at 175cm 39.2, and at 200cm 30.0: a spread of 23.3 points from one unchanged weight, which is wider than the entire healthy band. Inverting the formula gives what a weight can determine: 120kg sits inside the healthy BMI band for heights between 220cm and 255cm, a window 35cm wide, or roughly 7ft 2in to 8ft 4in. On the WHO 2004 cut-offs for South and East Asian populations the shortest suitable height rises to 229cm, 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.