How it works
Fill in the 2 fields above and Compression Ratio Calculator calculates the result instantly, recalculating as you change any value. It applies the formula (swept + clearance) / clearance. The math runs locally in your browser — nothing is sent to a server.
Formula
(swept + clearance) / clearanceExamples
- Cylinder (swept) volume 500 cc, Clearance volume 55 cc → Compression ratio: 10.09:1
Frequently asked questions
How do I use the Compression Ratio Calculator?
Enter your values in the 2 input fields and the result is calculated automatically as you type. Change any value to see the numbers update instantly.
What formula does the Compression Ratio Calculator use?
It uses (swept + clearance) / clearance. The calculation is performed in your browser using standard, well-established math for accurate results.
Is my data private?
Yes. The Compression Ratio Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the Compression Ratio Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on automotive and the rest of the platform, you can use it as often as you like.
Popular in Automotive
Tire Pressure Temperature Calculator
Estimate tire pressure change with temperature.
Engine Displacement Calculator
Calculate engine displacement from bore and stroke.
EV Range Calculator
Estimate the driving range of an electric vehicle.
Fuel Injector Size Calculator
Calculate the injector size for a target horsepower.