Body mass index is a number used to compare a person's height to their weight. It's often
a rough measure to dertermine if somebody is underweight, a healthy weight, or obese.
An adult BMI between 18.5 and 25 is generally considered healthy. BMI is calculated the same
way for both men and women.
Compare body mass index by height (feet and inches) and weight (lbs)
| 3'10 | 3'10.5 | 3'11 | 3'11.5 | 4'0 | 4'0.5 | 4'1 | 4'1.5 | 4'2 | 4'2.5 | 4'3 | 4'3.5 | 4'4 |
| 311 pounds | 103.3 | 101.1 | 99.0 | 96.9 | 94.9 | 92.9 | 91.1 | 89.2 | 87.5 | 85.7 | 84.1 | 82.4 | 80.9 |
| 311.5 pounds | 103.5 | 101.3 | 99.1 | 97.1 | 95.0 | 93.1 | 91.2 | 89.4 | 87.6 | 85.9 | 84.2 | 82.6 | 81.0 |
| 312 pounds | 103.7 | 101.4 | 99.3 | 97.2 | 95.2 | 93.2 | 91.4 | 89.5 | 87.7 | 86.0 | 84.3 | 82.7 | 81.1 |
| 312.5 pounds | 103.8 | 101.6 | 99.5 | 97.4 | 95.4 | 93.4 | 91.5 | 89.7 | 87.9 | 86.1 | 84.5 | 82.8 | 81.2 |
| 313 pounds | 104.0 | 101.8 | 99.6 | 97.5 | 95.5 | 93.5 | 91.6 | 89.8 | 88.0 | 86.3 | 84.6 | 83.0 | 81.4 |
| 313.5 pounds | 104.2 | 101.9 | 99.8 | 97.7 | 95.7 | 93.7 | 91.8 | 89.9 | 88.2 | 86.4 | 84.7 | 83.1 | 81.5 |
| 314 pounds | 104.3 | 102.1 | 99.9 | 97.8 | 95.8 | 93.8 | 91.9 | 90.1 | 88.3 | 86.6 | 84.9 | 83.2 | 81.6 |
| 314.5 pounds | 104.5 | 102.3 | 100.1 | 98.0 | 96.0 | 94.0 | 92.1 | 90.2 | 88.4 | 86.7 | 85.0 | 83.4 | 81.8 |
| 315 pounds | 104.7 | 102.4 | 100.2 | 98.1 | 96.1 | 94.1 | 92.2 | 90.4 | 88.6 | 86.8 | 85.1 | 83.5 | 81.9 |
| 315.5 pounds | 104.8 | 102.6 | 100.4 | 98.3 | 96.3 | 94.3 | 92.4 | 90.5 | 88.7 | 87.0 | 85.3 | 83.6 | 82.0 |
| 316 pounds | 105.0 | 102.7 | 100.6 | 98.5 | 96.4 | 94.4 | 92.5 | 90.7 | 88.9 | 87.1 | 85.4 | 83.8 | 82.2 |
| 316.5 pounds | 105.2 | 102.9 | 100.7 | 98.6 | 96.6 | 94.6 | 92.7 | 90.8 | 89.0 | 87.2 | 85.5 | 83.9 | 82.3 |
| 317 pounds | 105.3 | 103.1 | 100.9 | 98.8 | 96.7 | 94.7 | 92.8 | 91.0 | 89.1 | 87.4 | 85.7 | 84.0 | 82.4 |
| 317.5 pounds | 105.5 | 103.2 | 101.0 | 98.9 | 96.9 | 94.9 | 93.0 | 91.1 | 89.3 | 87.5 | 85.8 | 84.2 | 82.5 |
| 318 pounds | 105.6 | 103.4 | 101.2 | 99.1 | 97.0 | 95.0 | 93.1 | 91.2 | 89.4 | 87.7 | 85.9 | 84.3 | 82.7 |
| 318.5 pounds | 105.8 | 103.6 | 101.4 | 99.2 | 97.2 | 95.2 | 93.3 | 91.4 | 89.6 | 87.8 | 86.1 | 84.4 | 82.8 |
| 319 pounds | 106.0 | 103.7 | 101.5 | 99.4 | 97.3 | 95.3 | 93.4 | 91.5 | 89.7 | 87.9 | 86.2 | 84.6 | 82.9 |
| 319.5 pounds | 106.1 | 103.9 | 101.7 | 99.5 | 97.5 | 95.5 | 93.5 | 91.7 | 89.8 | 88.1 | 86.4 | 84.7 | 83.1 |
| 320 pounds | 106.3 | 104.0 | 101.8 | 99.7 | 97.6 | 95.6 | 93.7 | 91.8 | 90.0 | 88.2 | 86.5 | 84.8 | 83.2 |
| 320.5 pounds | 106.5 | 104.2 | 102.0 | 99.9 | 97.8 | 95.8 | 93.8 | 92.0 | 90.1 | 88.3 | 86.6 | 85.0 | 83.3 |
| 321 pounds | 106.6 | 104.4 | 102.2 | 100.0 | 97.9 | 95.9 | 94.0 | 92.1 | 90.3 | 88.5 | 86.8 | 85.1 | 83.5 |