This is a handy CC to HP calculator and this page explains everything you need to understand about CC, HP, and the conversion process.
What is Engine 'CC'
cc stands for "cubic centimeter", a unit of measurement commonly used to determine engine displacement.
Engine displacement is the total internal volume of all the cylinders in an internal combustion engine.
What is Engine 'HP'
HP stands for "horsepower," a unit of measurement commonly used to quantify the power or performance of an engine.
HP represents the rate at which work is done, and in the context of engines, it indicates the engine's output power.
Small Engine Calculation Example
This is a 725cc Kohler engine from a Troy-Built 46 inch Super Bronco riding mower and it is rated by the manufacturer as having 22HP.
Let's do the math: 725cc divided by 22HP yields roughly one HP per 33cc.
CC to HP Formula
There isn't a direct conversion between CC and HP because horsepower depends on various factors, including engine efficiency and design.
As a rough estimate for small engines(mowers, chainsaws, etc) , you should use the rule of thumb that 33 CC is approximately equal to 1 horsepower. However, this is a generalization and may not hold exactly true for all small engines.
Examples:
- HP=CC×33 (for small engines like chainsaws and mowers)
- HP=CC×15 (for vehicles like motorcycles and cars)
CC-HP Efficiency
Keep in mind that the CC to HP conversion is a rule of thumb and doesn't consider factors like engine efficiency.
High-quality engines are more efficient, built to tighter specifications, and they can generate more HP for the same CC. Therefore, two mowers with the same CC may have different actual HP outputs due to engine design and build quality.
Importance of Torque in Calculations
While CC and HP are vital, torque is equally essential in determining engine output performance.
Torque is measured in inch-lbs and foot-lbs. Learn more: Inch-lbs to Foot-lbs Converter.
