Body Surface Area (BSA) Calculator
Calculate your Body Surface Area using multiple formulas.
What is the Body Surface Area (BSA) Calculator?
The Body Surface Area (BSA) Calculator allows you to calculate the total surface area of the human body. BSA is an important metric used in various clinical purposes, such as calculating doses of chemotherapy and determining the cardiac index.
We provide calculations based on the most widely recognized formulas, including Du Bois, Mosteller, Haycock, Gehan and George, Boyd, Fujimoto, Takahira, and Schlich.
Practical Examples & Reference Guide
Example Output for a Standard Adult
For an average adult male with a height of 180 cm (5' 11") and a weight of 75 kg (165 lbs), the results from different formulas are:
| Formula | BSA (m²) | BSA (ft²) |
|---|---|---|
| Du Bois | 1.94 | 20.84 |
| Mosteller | 1.94 | 20.85 |
| Haycock | 1.95 | 21.03 |
| Gehan & George | 1.95 | 21.04 |
| Boyd | 1.97 | 21.21 |
| Fujimoto | 1.90 | 20.50 |
| Takahira | 1.95 | 20.97 |
| Schlich (Male) | 1.96 | 21.14 |
Note: Results may slightly vary based on the specific formula used.
In-Depth Technical Guide
Why Calculate Body Surface Area?
Body Surface Area (BSA) is a better indicator of metabolic mass than body weight because it is less affected by abnormal adipose mass. It is commonly used in medicine to determine:
- Safe chemotherapy dosages.
- Glucocorticoid dosages.
- Renal function assessments (e.g., estimating GFR).
- Cardiac index.
Formulas Used
- Du Bois Formula: A widely used standard dating back to 1916.
- Mosteller Formula: Simplest and most commonly used today due to ease of calculation.
- Haycock Formula: Recommended for children and infants.
- Boyd Formula: An intricate formula developed for precise measurements.