# How to Convert CC to HP for Small Engines

by Joe Friedman hanhanpeggy/iStock/Getty Images

The relationship between cubic centimeters (cc) and horsepower (hp) is complex and depends on many factors. First of all, it's important to note that cc is a measure of engine size, while hp is a measure of how much power it produces. Generally, a larger engine will produce more power, but the ratio isn't uniform across all engines. It depends on how well-tuned the engine is, as well as the type of fuel it uses. Most modern passenger cars, however, do fall into a small range of ratios.

## Step 1 Divide the cc of the engine by 15. For example, the 1800 cc of a 1.8-liter 16V Ford Escort's engine divided by 15 yields 120 hp.

## Step 2 Divide the cc of the engine by 17. For example, the Escort's 1800 cc divided by 17 yields approximately 106.

## Step 3 Recognize the horsepower falls somewhere in the range established by the previous steps. In fact, the Escort's horsepower is 115. Its cc to hp ratio is 15.6522.

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