BMI for 55 kg and 155 cm
Instant answer: A person who weighs 55 kg (121 lbs) and is 155 cm (5'1") tall has a BMI of 22.9, classified as normal weight.
At 155 cm, the BMI-based healthy weight range spans 44.4 kg to 59.8 kg, with the midpoint considered the most statistically protective.
What does a BMI of 22.9 mean?
Staying inside this band is associated with the most favourable metabolic markers in adult populations under 65.
BMI is a screening tool, not a diagnosis. Two people at 55 kg and 155 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 155 cm
The BMI-based healthy weight range for 155 cm tall adults is 44.4–59.8 kg (98–132 lbs).
| Weight | In lbs | BMI | Category |
|---|---|---|---|
| 40 kg | 88 lbs | 16.6 | Underweight |
| 45 kg | 99 lbs | 18.7 | Normal weight |
| 50 kg | 110 lbs | 20.8 | Normal weight |
| 55 kg (this page) | 121 lbs | 22.9 | Normal weight |
| 60 kg | 132 lbs | 25.0 | Overweight |
| 65 kg | 143 lbs | 27.1 | Overweight |
| 70 kg | 154 lbs | 29.1 | Overweight |
Practical next steps
- Continue current habits; this BMI band is associated with the lowest health risk.
- Focus on protein intake (0.8–1 g per kg) and quality sleep.
- Track waist circumference rather than weight as you age.
- Annual labs are still worthwhile even at a healthy weight.
Frequently asked questions
What is the BMI for 55 kg and 155 cm?
Using the formula BMI = weight (kg) ÷ height (m)², a person who weighs 55 kg and is 155 cm tall has a BMI of 22.9. This places them in the normal weight category as defined by the World Health Organization.
Is 55 kg a healthy weight at 155 cm?
The healthy weight range for 155 cm is 44.4–59.8 kg, corresponding to a BMI of 18.5–24.9. 55 kg gives a BMI of 22.9, which is normal weight.
How was this BMI calculated?
BMI = 55 ÷ (1.55 × 1.55) = 55 ÷ 2.4025 = 22.9.
What should I do if my BMI is 22.9?
Continue current habits; this BMI band is associated with the lowest health risk. Focus on protein intake (0.8–1 g per kg) and quality sleep.