Body Surface Area Calculator

Calculated using standard mathematical and industry formulas.

Free online Bsa Calculator calculator and unit conversion tool for everyday, engineering, and home projects.

How to use this calculator?

  1. Select your unit system (metric or imperial).
  2. Enter height and weight.
  3. Compare BSA results across Mosteller, DuBois, and Haycock equations.

Formula & calculation method

Mosteller & DuBois BSA Formulas

Mosteller BSA = √((Height(cm) × Weight(kg)) ÷ 3600)

DuBois BSA = 0.007184 × Height(cm)^0.725 × Weight(kg)^0.425.

Step-by-step calculation example

Height 175 cm, Weight 70 kg → Mosteller BSA = √((175 × 70) / 3600) ≈ 1.84 m².

Key insights to remember

How to interpret your results?

Mosteller BSA

Standard clinical BSA estimation method.

DuBois BSA

Historical reference formula for metabolic indexing.

Frequently asked questions

How do I use the Bsa Calculator calculator?
Enter your numerical input and select desired units to get instant accurate results.
How accurate are the conversions?
Conversions use official ISO conversion factors for maximum precision.
Does it convert metric and imperial units?
Yes, seamless conversions between metric (meters, kg) and imperial (feet, lbs) are supported.
Is my data stored?
No, all calculations execute 100% locally in your browser with zero data logging.
Can I use this for DIY or engineering projects?
Yes, it provides reliable estimates for construction, crafting, science, and everyday math.
What if I enter invalid inputs?
The calculator will display a friendly error prompt if non-numeric values are entered.

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