BMI for 55 kg and 163 cm
Instant answer: A person who weighs 55 kg (121 lbs) and is 163 cm (5'4") tall has a BMI of 20.7, classified as normal weight.
Public-health guidelines place the ideal weight for 163 cm tall adults at 49.2–66.2 kg, equivalent to a BMI between 18.5 and 24.9.
What does a BMI of 20.7 mean?
Multi-decade studies (notably the NIH-AARP cohort of more than 500,000 adults) link this BMI band to the lowest all-cause mortality.
BMI is a screening tool, not a diagnosis. Two people at 55 kg and 163 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 163 cm
The BMI-based healthy weight range for 163 cm tall adults is 49.2–66.2 kg (108–146 lbs).
| Weight | In lbs | BMI | Category |
|---|---|---|---|
| 40 kg | 88 lbs | 15.1 | Underweight |
| 45 kg | 99 lbs | 16.9 | Underweight |
| 50 kg | 110 lbs | 18.8 | Normal weight |
| 55 kg (this page) | 121 lbs | 20.7 | Normal weight |
| 60 kg | 132 lbs | 22.6 | Normal weight |
| 65 kg | 143 lbs | 24.5 | Normal weight |
| 70 kg | 154 lbs | 26.3 | 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 163 cm?
Using the formula BMI = weight (kg) ÷ height (m)², a person who weighs 55 kg and is 163 cm tall has a BMI of 20.7. This places them in the normal weight category as defined by the World Health Organization.
Is 55 kg a healthy weight at 163 cm?
The healthy weight range for 163 cm is 49.2–66.2 kg, corresponding to a BMI of 18.5–24.9. 55 kg gives a BMI of 20.7, which is normal weight.
How was this BMI calculated?
BMI = 55 ÷ (1.63 × 1.63) = 55 ÷ 2.6569 = 20.7.
What should I do if my BMI is 20.7?
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.