Car battery CCA calculator
Estimate the cold cranking amps your battery needs from your engine, climate, and fuel.
CCA measures how much current a battery delivers in the cold, when starting is hardest. Use this as a guide, then confirm the exact rating for your vehicle.
Want the exact spec instead of an estimate? Look up your car's battery →
Frequently asked
How many CCA does my car need?
As a rule of thumb, a small 4-cylinder needs roughly 500-600 CCA, a V6 around 600-700, and a V8 or truck 700-900. Cold climates and diesel engines need more. The exact figure is set by your manufacturer - match or exceed it.
Is more CCA always better?
Higher CCA does not hurt and helps in cold weather, as long as the battery is the correct group size and fits your tray. Going below the OEM rating risks hard starts in winter.
Does hot weather need more CCA?
No - heat does not raise the CCA you need, but it shortens battery life. Cold is what demands high CCA, because a battery delivers far fewer amps when it is freezing.