Boys
Height: 79.4 - 93.8 cm
Weight: 9.2 - 12.9 kg
The height and weight of a boy at 1 year 9 months are normally 79.4 - 93.8 cm and 9.2 - 12.9 kg
| Height | Description |
|---|---|
| Less than 76.5 cm | Below normal (extremely short) |
| 76.5 - 79.4 cm | Below normal (undersized) |
| 79.4 - 82.3 cm | Normal (below average) |
| 82.3 - 88.0 cm | Normal (average) |
| 88.0 - 90.9 cm | Normal (above average) |
| 90.9 - 93.8 cm | OK (high) |
| Over 93.8 cm | Very tall |
| The weight | Description |
|---|---|
| Less than 8.2 kg | Below normal (extremely insufficient) |
| 8.2 - 9.2 kg | Below normal (insufficient) |
| 9.2 - 10.3 kg | Normal (below average) |
| 10.3 - 12.9 kg | Normal (average) |
| 12.9 - 14.5 kg | Normal (above average) |
| 14.5 - 16.2 kg | Normal (very large) |
| More than 16.2 kg | Doesn't match age |
Girls
Height: 77.5 - 92.9 cm
Weight: 8.6 - 12.3 kg
The height and weight of a girl at 1 year 9 months are normally 77.5 - 92.9 cm and 8.6 - 12.3 kg
| Height | Description |
|---|---|
| Less than 74.5 cm | Below normal (extremely short) |
| 74.5 - 77.5 cm | Below normal (undersized) |
| 77.5 - 80.6 cm | Normal (below average) |
| 80.6 - 86.7 cm | Normal (average) |
| 86.7 - 89.8 cm | Normal (above average) |
| 89.8 - 92.9 cm | OK (high) |
| More than 92.9 cm | Very tall |
| The weight | Description |
|---|---|
| Less than 7.6 kg | Below normal (extremely insufficient) |
| 7.6 - 8.6 kg | Below normal (insufficient) |
| 8.6 - 9.6 kg | Normal (below average) |
| 9.6 - 12.3 kg | Normal (average) |
| 12.3 - 14.0 kg | Normal (above average) |
| 14.0 - 16.0 kg | Normal (very large) |
| More than 16.0 kg | Doesn't match age |
You can use the BMI calculator to get a more accurate estimate of your child's age and height.
Learn about the developmental features of a child at one and a half years
