Ideal height and BMI for 45 kg adults
45 kg is a healthy weight if you're between 135 cm and 155 cm tall (a BMI of 18.5 to 24.9).
If you're shorter than 135 cm, 45 kg gives you a BMI of 25 or more. If you're taller than 155 cm, your BMI is under 18.5.
Over means overweight. Under means underweight.
Your BMI at 45 kg, by height
We show BMI to one decimal place without rounding up, so 24.96 shows as 24.9 and counts as a healthy weight.
| Height | BMI | Category |
|---|---|---|
| 135 cm | 24.6 | Healthy weight |
| 138 cm | 23.6 | Healthy weight |
| 141 cm | 22.6 | Healthy weight |
| 144 cm | 21.7 | Healthy weight |
| 147 cm | 20.8 | Healthy weight |
| 150 cm | 20.0 | Healthy weight |
| 153 cm | 19.2 | Healthy weight |
| 156 cm | 18.4 | Underweight |
| 159 cm | 17.7 | Underweight |
| 162 cm | 17.1 | Underweight |
| 165 cm | 16.5 | Underweight |
| 168 cm | 15.9 | Underweight |
| 171 cm | 15.3 | Underweight |
| 174 cm | 14.8 | Underweight |
| 177 cm | 14.3 | Underweight |
| 180 cm | 13.8 | Underweight |
| 183 cm | 13.4 | Underweight |
| 186 cm | 13.0 | Underweight |
| 189 cm | 12.5 | Underweight |
| 192 cm | 12.2 | Underweight |
| 195 cm | 11.8 | Underweight |
| 198 cm | 11.4 | Underweight |
What it means
A healthy weight fits a range of heights. At a given weight, your BMI goes down as your height goes up. The heights in your answer are the ones that give a BMI of 18.5 to 24.9.
We don't round BMI up. We show BMI to one decimal place and drop the rest instead of rounding. So 24.96 shows as 24.9 and still counts as a healthy weight.
BMI doesn't tell the whole story. BMI doesn't account for muscle, bone, age or sex. Two adults with the same BMI can have different health.
How BMI works
- BMI is your weight divided by your height squared. If you use pounds and inches, multiply the result by 703.
- For the most accurate number, weigh yourself in the morning and measure your height without shoes.
- Your category comes from the BMI with the extra decimals dropped, not rounded.
Nearby weights
Common questions
Short answers about how these calculators work.
Sources
Where these numbers come from
- About adult BMI (opens in a new tab) - CDCBMI categories for adults
- Calculate your BMI (opens in a new tab) - National Heart, Lung, and Blood InstituteHow BMI is calculated for adults
Related calculators