Calculates body surface area (BSA) from height and weight using three formulas: Du Bois, Shintani, and Fujimoto.
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Calculation basis and official references
Reviewed on:
This calculator is not a diagnosis, treatment plan, or prescription. Please consult a qualified clinician about your medical decisions.
Formula basis
Du Bois formula: BSA (m²) = 0.007184 × height(cm)^0.725 × weight(kg)^0.425. Shintani formula: the same exponents (height^0.725 × weight^0.425) with the coefficient replaced by 0.007358. Fujimoto formula: BSA (m²) = 0.008883 × height(cm)^0.663 × weight(kg)^0.444. This implementation displays all three results rounded to 6 significant figures.
Calculation method
Shows three regression-based estimates of body surface area (BSA) from measured height and weight: the Du Bois formula, the Shintani formula, and the Fujimoto formula.
Exclusions and checks required
All three are regression-based estimates; an individual's measured surface area can differ from the formula result by a few percent.
The 1931 paper attributed as the origin of the Shintani formula's coefficient (0.007358) could not be directly accessed online during this review, so the coefficient has not been checked against that primary source.
For medical decisions such as drug dosing, results must be independently confirmed by a qualified clinician.
Example input:：Example for height 170 cm and weight 65 kg
height
170
weight
65
The three formulas can differ by a few percent because they were derived from different measured populations and regression methods. All are reference estimates, not direct measurements.
Who is this calculator for? Body Surface Area (BSA)
Calculates body surface area (BSA) from height and weight using three formulas: Du Bois, Shintani, and Fujimoto.
What values should I enter?
Applies to: Body & metabolism
How should I interpret this estimate?
Shows three regression-based estimates of body surface area (BSA) from measured height and weight: the Du Bois formula, the Shintani formula, and the Fujimoto formula.
How to use
Enter your input values and press Calculate.
Review the result and compare it with expected context.
Du Bois formula: BSA (m²) = 0.007184 × height(cm)^0.725 × weight(kg)^0.425. Shintani formula: the same exponents (height^0.725 × weight^0.425) with the coefficient replaced by 0.007358. Fujimoto formula: BSA (m²) = 0.008883 × height(cm)^0.663 × weight(kg)^0.444. This implementation displays all three results rounded to 6 significant figures.