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Brake Specific Fuel Consumption (BSFC) Calculator

Physics
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Calculates the Brake Specific Fuel Consumption (BSFC) of an engine. BSFC is a crucial metric for engine efficiency, representing the mass of fuel consumed per unit of power generated per hour.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Fuel Consumption and Brake Horsepower (BHP) in the units shown.

Step 2

Read Brake Specific Fuel Consumption (BSFC) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Example 1: Moderate Engine

Fuel Consumption: 20 lb/hr; Brake Horsepower (BHP): 100 hp

Brake Specific Fuel Consumption (BSFC): 0.2 lb/hp-hr

Example 2: Low Consumption

Fuel Consumption: 15 lb/hr; Brake Horsepower (BHP): 150 hp

Brake Specific Fuel Consumption (BSFC): 0.1 lb/hp-hr

Example 3: High Power

Fuel Consumption: 30 lb/hr; Brake Horsepower (BHP): 250 hp

Brake Specific Fuel Consumption (BSFC): 0.12 lb/hp-hr

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