# Body Surface Area Calculator

Calculator

Body Surface Area Calculator for calculating body surface area with the four best methods: DuBois and DuBois, Haycock, Gehan and George, Mosteller. Finally, a super easy-to-use BSA calculator.

Q&A

## How to calculate Body Surface Area?

The BSA Calculator uses four different methods to calculate the body surface area:

1. DuBois D, DuBois DF. A formula to estimate the approximate surface area if height and weight be known. Arch Int Med 1916;17:863-71. BSA calculator formula for this method: BSA(m2) = 0.007184 * Height(cm)0.725 * Weight(kg)0.425
2. Haycock GB, Schwartz GJ, Wisotsky DH. Geometric method for measuring body surface area: A height-weight formula validated in infants, children and adults. J Pediatr 1978;93:62-6. BSA calculator formula for this method: BSA (m2) = 0.024265 * Height(cm)0.3964 * Weight(kg)0.5378
3. Gehan EA, George SL. Estimation of human body surface area from height and weight. Cancer Chemother Rep 1970;54:225-35. BSA calculator formula for this method: BSA (m2) = 0.0235 * Height(cm)0.42246 * Weight(kg)0.51456
4. Mosteller RD. Simplified calculation of body-surface area. N Engl J Med 1987;317:1098. BSA calculator formula for this method: BSA (m2) = [(Height(cm) * Weight(kg))/3600]0.5

The most widely used formula for calculating Body Surface Area is the Du Bois formula, which has been shown to be equally as effective in estimating body fat in obese and non-obese patients, something the Body mass index fails to do.

## How to use the Body Surface Area Calculator?

Select the unit first (imperial or metric) for BSA Calculation. Enter your height and weight and then click on the Calculate button of the BSA Calculator. The BSA Calculation results are shown immediately.

## What is Body Surface Area Calculation used for?

Body Surface Area Calculation is used for clinical purposes, for example, to calculate drug dosages and medical indicators or assessments. BSA seems to be a better indicator of metabolic mass than body weight because it is less affected by abnormal adipose mass.

## Average values for Body Surface Area by age and gender

### BSA Calculator: Average Male BSA Values

 AGE IMPERIAL METRIC Neonate (newborn) 2.612 ft2 0.243 m2 2 years 6.060 ft2 0.563 m2 5 years 8.471 ft2 0.787 m2 10 years 13.304 ft2 1.236 m2 13 years 17.255 ft2 1.603 m2 18 years 21.313 ft2 1.980 m2 20-79 years 22.173 ft2 2.060 m2 80+ years 20.667 ft2 1.920 m2

### BSA Calculator: Average Female BSA Values

 AGE IMPERIAL METRIC Neonate (newborn) 2.519 ft2 0.234 m2 2 years 5.813 ft2 0.540 m2 5 years 8.299 ft2 0.771 m2 10 years 13.401 ft2 1.245 m2 13 years 16.684 ft2 1.550 m2 18 years 18.579 ft2 1.726 m2 20-79 years 19.697 ft2 1.830 m2 80+ years 17.631 ft2 1.638 m2

Body Surface Area averages in the tables above are based weight and height data from the U.S. NCHS National Health and Nutrition Examination Survey (2011-2014)