For body weight under 40 kg
| Body Weight (kg) | Surface area (m2) |
|---|---|
| 40 | 1.3 |
| 39 | 1.3 |
| 38 | 1.2 |
| 37 | 1.2 |
| 36 | 1.2 |
| 35 | 1.2 |
| 34 | 1.1 |
| 33 | 1.1 |
| 32 | 1.1 |
| 31 | 1.1 |
| 30 | 1.1 |
| 29 | 1.0 |
| 28 | 1.0 |
| 27 | 0.97 |
| 26 | 0.95 |
| 25 | 0.92 |
| 24 | 0.90 |
| 23 | 0.87 |
| 22 | 0.85 |
| 21 | 0.82 |
| 20 | 0.79 |
| 19 | 0.77 |
| 18 | 0.74 |
| 17 | 0.71 |
| 16 | 0.68 |
| 15 | 0.65 |
| 14 | 0.62 |
| 13 | 0.59 |
| 12 | 0.56 |
| 11 | 0.53 |
| 10 | 0.49 |
| 9.5 | 0.47 |
| 9 | 0.46 |
| 8.5 | 0.44 |
| 8 | 0.42 |
| 7.5 | 0.40 |
| 7 | 0.38 |
| 6.5 | 0.36 |
| 6 | 0.34 |
| 5.5 | 0.32 |
| 5 | 0.30 |
| 4.5 | 0.28 |
| 4 | 0.26 |
| 3.5 | 0.24 |
| 3 | 0.21 |
| 2.5 | 0.19 |
| 2 | 0.16 |
| 1.5 | 0.13 |
| 1 | 0.10 |
This table was calculated using the Boyd equation
For body weight over 40 kg
| Body Weight (kg) | Surface area (m2) |
|---|---|
| 40 | 1.3 |
| 39 | 1.3 |
| 38 | 1.2 |
| 37 | 1.2 |
| 36 | 1.2 |
| 35 | 1.2 |
| 34 | 1.1 |
| 33 | 1.1 |
| 32 | 1.1 |
| 31 | 1.1 |
| 30 | 1.1 |
| 29 | 1.0 |
| 28 | 1.0 |
| 27 | 0.97 |
| 26 | 0.95 |
| 25 | 0.92 |
| 24 | 0.90 |
| 23 | 0.87 |
| 22 | 0.85 |
| 21 | 0.82 |
| 20 | 0.79 |
| 19 | 0.77 |
| 18 | 0.74 |
| 17 | 0.71 |
| 16 | 0.68 |
| 15 | 0.65 |
| 14 | 0.62 |
| 13 | 0.59 |
| 12 | 0.56 |
| 11 | 0.53 |
| 10 | 0.49 |
| 9.5 | 0.47 |
| 9 | 0.46 |
| 8.5 | 0.44 |
| 8 | 0.42 |
| 7.5 | 0.40 |
| 7 | 0.38 |
| 6.5 | 0.36 |
| 6 | 0.34 |
| 5.5 | 0.32 |
| 5 | 0.30 |
| 4.5 | 0.28 |
| 4 | 0.26 |
| 3.5 | 0.24 |
| 3 | 0.21 |
| 2.5 | 0.19 |
| 2 | 0.16 |
| 1.5 | 0.13 |
| 1 | 0.10 |
This table was calculated using the Boyd equation
If the height is known
Use Royal Children’s Hospital, Melbourne’s BSA calculator.
