Which formula is standard?

The Mosteller formula is the most commonly used in practice because it is simple and robust. The Du Bois formula is the classic standard.

What is the average BSA?

The average BSA for adult men is approximately 1.9 m², and for adult women is approximately 1.6 m².

Why not just use weight?

BSA provides a more accurate estimate of metabolic mass, which is critical for potentially toxic medications with narrow therapeutic indices.

Body Surface Area Calculator

Calculate Body Surface Area (BSA) using Mosteller and Du Bois formulas. Used for medical dosages.

bsabody surface areamostellermedical calculator

Disclaimer: This tool provides estimates for informational and educational purposes only. It does not constitute professional financial, medical, or legal advice. Please consult with a qualified professional before making any significant decisions based on these estimations.

Common Use Cases

general awareness and educational estimates
wellness planning alongside professional guidance
tracking simple ranges over time

What is Body Surface Area Calculator?

The Body Surface Area (BSA) Calculator estimates the total surface area of the human body. It is often considered a better indicator of metabolic mass than body weight alone. BSA is widely used in medicine for calculating drug dosages (especially chemotherapy) and assessing cardiac index.

How to Use This Tool

1Enter your height and weight
2View your BSA calculated by four different formulas

Example

Input

175cm, 75kg

Output

BSA: 1.91 m²

Before You Rely on This Result

UtilityNest keeps tools in this category focused on transparency: short instructions, a worked example, and plain-language guidance so you can review the result before you depend on it.

Check that the inputs reflect your real situation before you rely on the estimate.
Rules, rates, health needs, and legal requirements may vary by country, state, insurer, or provider.
Use this result as a starting point, then confirm important decisions with official sources or a qualified professional.

Frequently Asked Questions

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