Body Surface Area (BSA) Calculator (Mosteller & Du Bois)
Calculates patient Body Surface Area (m²) using both Mosteller and Du Bois equations for clinical dosing and renal indexing.
⚠️ Educational Calculation & Clinical Safety Safeguard: Check oncology protocol specifications on whether BSA is capped at 2.0 m² or calculated on actual body weight. Educational calculations do not replace clinician assessment, patient-specific laboratory monitoring, or institutional prescribing protocols.
Interactive Calculator
Allowed physiological/compounding range: 30 to 240 cm
Allowed physiological/compounding range: 1 to 250 kg
Calculated Output (m² (Mosteller & Du Bois))
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Step-by-Step Mathematical Derivation & Explanation:
Validated Formula & Conversion Rules
Mosteller BSA (m²) = √([Height(cm) × Weight(kg)] / 3600); Du Bois BSA = 0.007184 × Height(cm)^0.725 × Weight(kg)^0.425Worked Clinical Example
Height 160 cm, Weight 90 kg: Mosteller BSA = √(14400 / 3600) = √4 = 2.00 m².
Rounding Rules, Clinical Interpretation, Assumptions & Known Limitations
- 1. Purpose: Calculates patient Body Surface Area (m²) using both Mosteller and Du Bois equations for clinical dosing and renal indexing.
- 2. Required Inputs & Validated Units: Height (cm, range 30–240), Weight (kg, range 1–250)
- 3. Output Unit:
m² (Mosteller & Du Bois) - 4. Result Interpretation Notes: Computes Body Surface Area (m²) via both Mosteller and Du Bois equations for side-by-side clinical verification.
- 5. Rounding Guidance: Round BSA to 2 decimal places (m²).
- 6. Mathematical & Clinical Assumptions: Mosteller is standard in clinical oncology and paediatric protocols due to mathematical simplicity.
- 7. Known Limitations & Contraindications to Formula Use: Use actual vs ideal weight per specific institutional oncology protocol guidelines.
- 8. Supporting Compendial & Clinical References: Indian Pharmacopoeia (IP 2022), National Formulary of India (NFI), British National Formulary (BNF), and NCBI Bookshelf Clinical Pharmacology Compendia.