At 115kg the BMI runs from 51.1 at 150cm to 28.8 at two metres — still above the healthy band at every adult height. What a category can tell you at this point is fairly limited. It sees a ratio of two numbers and nothing else: not where weight sits, not what proportion is muscle, not blood pressure or glucose or fitn..
= 5ft 8.9in
YOUR RESULTS
BODY MASS INDEX
37.6
Obese Class II
BMI PRIME
1.50
Normal = 0.74–1.00
PONDERAL INDEX
21.5
kg/m³
HEALTHY WEIGHT RANGE
56.7 – 76.3 kg
Lose 38.7 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 115kg, which is about 254 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 115kg the healthy band runs 215 to 249cm, 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 115kg — about 254 pounds — the BMI is undetermined until a height is supplied. At 150cm it is 51.1, at 175cm 37.6, and at 200cm 28.8: a spread of 22.4 points from one unchanged weight, which is wider than the entire healthy band. Inverting the formula gives what a weight can determine: 115kg sits inside the healthy BMI band for heights between 215cm and 249cm, a window 34cm wide, or roughly 7ft 1in to 8ft 2in. On the WHO 2004 cut-offs for South and East Asian populations the shortest suitable height rises to 224cm, 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.