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How to Convert Engine Horsepower to CC

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CC, or cubic centimeters, is a measurement of volume or size. Engine horsepower is a measurement of power output at certain rotation frequencies. Rotation frequencies are measured in revolutions per minute, or rpm.

Engine horsepower cannot be directly converted to cc because horsepower is measured at rpm levels that cubic centimeters do not account for. While no specific formula for the conversion of engine horsepower to cc exists, on average 1 horsepower equals 16 cc.

Step 1

Determine your engine’s peak horsepower. An engine’s peak horsepower is typically measured at a certain rpm level.