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BSA Body Surface Area Calculator

Calculate body surface area for medical dosing and standardization

最后更新:
最后更新:
基本信息

最经典和广泛使用的公式

简化且精确的公式

适用于儿童和成人

基于大样本数据

更复杂但精确的公式

Body surface area formulas
This calculator compares common body surface area equations used to normalize clinical measurements and medication dosing decisions.
Du Bois BSA = 0.007184 x weight(kg)^0.425 x height(cm)^0.725
Mosteller BSA = sqrt((height(cm) x weight(kg)) / 3600)
Haycock BSA = 0.024265 x weight(kg)^0.5378 x height(cm)^0.3964
weight
Body weight
Converted to kilograms before the selected formula is applied.
height
Body height
Converted to centimeters before the selected formula is applied.
BSA
Body surface area
Reported in square meters and rounded for display.
How this BSA calculator works
Body surface area is an estimate, not a direct measurement. The selected equation, patient measurement quality, and local clinical protocol can all change how the result should be used.
  1. Convert height and weight into the units required by each equation.
  2. Apply the selected BSA equation and round the result for display.
  3. Show formula comparisons when multiple equations are selected so clinicians can see the spread between methods.
  4. Use the result as a reference value only; medication dosing and treatment decisions should follow local protocols and clinician review.

Important notes

  • BSA equations may diverge for infants, very small adults, severe obesity, edema, amputations, and other body-composition edge cases.
  • For chemotherapy, pediatric dosing, renal dosing, or critical-care use, verify the equation required by the institution or drug label.
  • A rounded BSA value can materially affect dosing when narrow therapeutic windows are involved.

Medical Disclaimer

This calculator is for clinical reference only. Dosage decisions should be verified by a qualified healthcare professional.