Body Surface Area Calculator
Estimate adult body surface area from height and weight using Mosteller’s 1987 equation.
Formula
BSA (m²) = √(height in cm × weight in kg / 3600).
Weight: 176 lb · Height: 71 in · Estimated surface area ≈ sqrt((176 lb × 0.45359237 kg/lb)×(71 in × 0.0254 m/in)×100÷3600)
How to use
- Enter adult weight.
- Enter height and units.
- Read the area in square meters.
Examples
- 80 kg and 180 cm: 2.00 m².
Frequently asked questions
Is this measured skin area?
No. It is a mathematical estimate; body proportions can change accuracy.
Can I calculate a medicine dose?
Do not use this tool to choose or change treatment; dosing requires clinical supervision.
Does this replace medical advice?
For information only; it does not replace a doctor or individual assessment.
Sources
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