BSFC Calculator

Brake-specific fuel consumption.

BSFC (lb/hp·h) 0.1667

Step-by-step with your numbers:

1. Values used:

2. Fuel flow = 50 lb/h

3. Horsepower = 300 hp

4. BSFC = Fuel flow / Horsepower = 50 / 300 = 0.1667lb/hp·h

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BSFC measures engine fuel efficiency — lower is better.

The math behind it

BSFC = fuel flow rate ÷ horsepower.

Good BSFC?

Gasoline engines typically 0.45–0.55 lb/hp·h.