Body Surface Area Calculator
Calculate your Body Surface Area (BSA) using different medical formulas for accurate medication dosing and clinical assessment.
Your Body Surface Area
Based on the information you provided
Mosteller Formula
DuBois & DuBois
Haycock Formula
Frequently Asked Questions
What is Body Surface Area (BSA)?
Body Surface Area (BSA) is the measured or calculated surface area of the human body. It's used in many medical aspects, including calculating drug dosages and medical indicators. BSA is considered a more accurate indicator of metabolic mass than body weight.
Why is BSA important in medicine?
BSA is used to calculate drug dosages for many medications that have a narrow therapeutic index, such as chemotherapy drugs. It helps to individualize therapy and reduce the risk of underdosing or overdosing. BSA is also used in burn cases to estimate the extent of burns.
Which BSA formula is the most accurate?
The Mosteller formula is the most commonly used because of its simplicity and reasonable accuracy. However, the DuBois & DuBois formula was the original and is still considered very accurate. For pediatric patients, the Haycock formula is often preferred.
How often should BSA be recalculated?
BSA should be recalculated whenever there is a significant change in weight (5-10% change). For patients receiving long-term therapy, especially chemotherapy, BSA should be recalculated before each treatment cycle.
Can children use the same BSA formulas as adults?
While the same formulas are often used for both children and adults, the Haycock formula was specifically developed for use in both pediatric and adult populations. For very young children, specialized pediatric formulas may be used in clinical settings.