BMI for 100 kg and 180 cm
Instant answer: A person who weighs 100 kg (220 lbs) and is 180 cm (5'11") tall has a BMI of 30.9, classified as obese class i.
At 180 cm, the BMI-based healthy weight range spans 59.9 kg to 80.7 kg, with the midpoint considered the most statistically protective.
What does a BMI of 30.9 mean?
At this BMI level, the relative risk of type 2 diabetes is roughly five-fold compared with a BMI of 22, but even a 5–10% weight reduction meaningfully improves most metabolic markers.
BMI is a screening tool, not a diagnosis. Two people at 100 kg and 180 cm can have very different body compositions and very different health profiles. Use BMI alongside waist circumference, fitness level, and routine bloodwork.
Healthy weight range for 180 cm
The BMI-based healthy weight range for 180 cm tall adults is 59.9–80.7 kg (132–178 lbs).
| Weight | In lbs | BMI | Category |
|---|---|---|---|
| 85 kg | 187 lbs | 26.2 | Overweight |
| 90 kg | 198 lbs | 27.8 | Overweight |
| 95 kg | 209 lbs | 29.3 | Overweight |
| 100 kg (this page) | 220 lbs | 30.9 | Obese Class I |
| 105 kg | 231 lbs | 32.4 | Obese Class I |
| 110 kg | 243 lbs | 34.0 | Obese Class I |
| 115 kg | 254 lbs | 35.5 | Obese Class II |
Practical next steps
- Consult a GP for a full metabolic assessment (blood pressure, HbA1c, lipids).
- Set an initial target of 5–10% body-weight loss — clinically meaningful and achievable.
- Combine dietary change, daily movement, and sleep optimisation.
- Discuss whether structured programmes or medication are appropriate.
Frequently asked questions
What is the BMI for 100 kg and 180 cm?
Using the formula BMI = weight (kg) ÷ height (m)², a person who weighs 100 kg and is 180 cm tall has a BMI of 30.9. This places them in the obese class i category as defined by the World Health Organization.
Is 100 kg a healthy weight at 180 cm?
The healthy weight range for 180 cm is 59.9–80.7 kg, corresponding to a BMI of 18.5–24.9. 100 kg gives a BMI of 30.9, which is obese class i.
How was this BMI calculated?
BMI = 100 ÷ (1.80 × 1.80) = 100 ÷ 3.2400 = 30.9.
What should I do if my BMI is 30.9?
Consult a GP for a full metabolic assessment (blood pressure, HbA1c, lipids). Set an initial target of 5–10% body-weight loss — clinically meaningful and achievable.