BMI Calculator for Kids and Adolescents
Body Mass Index (BMI) is calculated for children and adolescents similarly to adults, but it takes the child's or adolescent's age into consideration.
BMI Calculator for Kids
Information about the BMI calculator for children and adolescents
As children grow, the amount of body fat varies, so the calculator must take into account the age and gender of the child or adolescent.
Please note that this calculator only provides an approximation. If you are concerned about the growth of your child, always consult a doctor.
BMI Levels for Girls
| Age | Underweight | Overweight | Significantly overweight |
|---|---|---|---|
| 2 | 14.0 | 18.0 | 19.1 |
| 3 | 14.0 | 17.2 | 18.3 |
| 4 | 13.7 | 16.8 | 18.0 |
| 5 | 13.5 | 16.8 | 18.3 |
| 6 | 13.4 | 17.1 | 18.8 |
| 7 | 13.4 | 17.6 | 19.7 |
| 8 | 13.5 | 18.3 | 20.7 |
| 9 | 13.7 | 19.1 | 21.8 |
| 10 | 14.0 | 20.0 | 23.0 |
| 11 | 14.4 | 20.9 | 24.1 |
| 12 | 14.8 | 21.7 | 25.3 |
| 13 | 15.3 | 22.6 | 26.3 |
| 14 | 15.8 | 23.3 | 27.3 |
| 15 | 16.3 | 24.0 | 28.1 |
| 16 | 16.8 | 24.7 | 28.9 |
| 17 | 17.2 | 25.2 | 29.6 |
| 18 | 17.6 | 25.7 | 30.3 |
| 19 | 17.8 | 26.1 | 31.0 |
| 20 | 17.8 | 26.5 | 31.8 |
BMI Levels for Boys
| Age | Underweight | Overweight | Significantly overweight |
|---|---|---|---|
| 2 | 14.7 | 18.1 | 19.3 |
| 3 | 14.3 | 17.3 | 18.2 |
| 4 | 14.0 | 16.9 | 17.8 |
| 5 | 13.8 | 16.8 | 17.9 |
| 6 | 13.7 | 17.0 | 18.4 |
| 7 | 13.7 | 17.4 | 19.1 |
| 8 | 13.8 | 18.0 | 20.0 |
| 9 | 14.0 | 18.6 | 21.1 |
| 10 | 14.2 | 19.4 | 22.2 |
| 11 | 14.6 | 20.2 | 23.2 |
| 12 | 15.0 | 21.0 | 24.2 |
| 13 | 15.5 | 21.6 | 25.2 |
| 14 | 16.0 | 22.7 | 26.1 |
| 15 | 16.6 | 23.5 | 26.8 |
| 16 | 17.1 | 24.2 | 27.6 |
| 17 | 17.7 | 24.9 | 28.3 |
| 18 | 18.2 | 25.7 | 29.0 |
| 19 | 18.7 | 26.4 | 29.7 |
| 20 | 19.1 | 27.0 | 30.6 |