Body Surface Area Calculator

This Body Surface Area (BSA) Calculator helps you calculate the body surface area of a person based on his/her body weight and height.

Its not very easy to do a direct measurement of BSA, so several formulas have been published to estimate BSA.

These calculators employ well-known formulas to calculate BSA.

BSA is often used in clinical purposes and is preferred over body weight because it is a more accurate indicator of metabolic mass (fat-free mass).

Here are the steps to calculate body surface area:

1. Select the measurement system (imperial or metric)
2. Input your gender
3. Enter weight and height
4. Select the equation you would like to use
5. Click on the “Calculate” button to observe the results.

Here are links to BSA Calculators:

• Body Surface Area Calculator on eviq.org.au
• Body Surface Area Calculator

References:

• Griggs JJ, Mangu PB, Anderson H, et al: Appropriate chemotherapy dosing for obese adult patients with cancer: American Society of Clinical Oncology clinical practice guideline. J Clin Oncol. 2012 May 1;30(13):1553-61
• Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974; 8:650-5.
• Erstad BL. Dosing of medications in morbidly obese patients in the intensive care unit setting. Intensive Care Med. 2004; 30:18-32.
• Dubois D, Dubois EF. A formula to estimate the approximate surface area if height and weight be known. Arch Intern Med. 1916; 17:863-871. Mosteller RD. Simplified calculation of body surface area. NEJM. 1987; 317:1098.