At 168cm the healthy range is 52.2 to 70.3kg on the standard thresholds. Something near this height is the median for adult men across much of South Asia, and it is another place where the choice of cut-off does real work: the upper bound falls to 64.6kg under the WHO's supplementary figures, a difference of 5.7 kilog..
= 5ft 6.1in
YOUR RESULTS
BODY MASS INDEX
24.8
Normal weight
BMI PRIME
0.99
Normal = 0.74–1.00
PONDERAL INDEX
14.8
kg/m³
HEALTHY WEIGHT RANGE
52.2 – 70.3 kg
Within the healthy weight range. Maintain with balanced diet and regular exercise.
BMI GAUGE
YOUR POSITION
FULL SUMMARY
WHO BMI CATEGORIES
The height is already set to 168cm, which is about 5 ft 6 in. Change it if that is not yours and everything below recalculates.
Enter a weight in kilograms. Switching to imperial converts the height to the nearest inch, which is a coarser step — two adjacent even centimetre values can land on the same one.
Read the range before the category. At this height it spans 18.1kg, and every weight inside produces the same verdict.
Treat a reading near a boundary as near a boundary. One kilogram is 0.35 of a point here, and most people vary by more than that across a day.
At 168cm — 1.68m, or about 5 ft 6 in — a BMI of 18.5 puts the lower bound at 52.2kg and a BMI of 24.9 puts the upper bound at 70.3kg. The window is 18.1kg, or about 40 pounds. One kilogram moves the number by 0.35 of a point, so it takes roughly 2.8kg to cross a whole one. On the WHO 2004 cut-offs for South and East Asian populations the upper bound drops to 64.6kg, a reduction of 5.6kg, with the lower bound unchanged.
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.