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Fuel Pump Calculator — Free Online Tool
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Fuel Pump Calculator

Calculate required fuel pump flow rate (GPH and LPH) based on engine horsepower

Formula: $\text{Fuel Flow (lbs/hr)} = \text{Horsepower} \text{ (HP)} \times \text{BSFC}$. Converted to gallons per hour (GPH) and liters per hour (LPH) factoring safety margins. Enter your engine specs below.
Engine & Fuel Parameters Input

Calculation Results

⚠️ Always factor in fuel pressure drop, line restriction, and voltage drops when selecting an aftermarket fuel pump.

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