buncha/health & fitness/bsa

Body Surface Area (BSA)

Units

Weight (kg)

Height (cm)

BSA results (m²)

Mosteller · default

1.82

DuBois & DuBois

1.81

Haycock

1.83

Better for kids

Boyd

1.83

For 70.0 kg × 170 cm

Which formula to use? Mosteller is the modern default — fast, simple, widely validated for adults and most pediatric ages. Haycock tends to be preferred for children and smaller adults because it was specifically validated in that population. DuBois is the original and is still cited in some pharmacology references. For most clinical purposes the four formulas agree to within a few percent. Use whatever your institution's protocols specify.

Read the guide

BSA — Mosteller vs DuBois vs Haycock vs Boyd, and Which to Use When

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About Body Surface Area (BSA)

BSA from height + weight using Mosteller, DuBois, Haycock, and Boyd formulas. For mg/m² dosing.

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