Fuel Pump Sizing Calculator

Calculate required fuel pump flow rate based on target horsepower, BSFC, fuel pressure, and system voltage considerations.

Input Parameters

Results

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Required Fuel Flow
lb/hr
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Flow Rate
gph
--
Flow Rate
lph
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Min Pump Rating
lph
Note: Fuel pump flow decreases with increasing pressure. Always check pump curves at operating pressure. E85 requires ~30% more flow than gasoline.

Reference

Fuel Flow (lb/hr) = HP x BSFC Flow (GPH) = lb/hr / 6.17 (gasoline density) Flow (LPH) = GPH x 3.785 Pressure Correction = sqrt(Base_P / Actual_P) Pump Rating = Corrected Flow x (1 + Safety%)