How to Convert CCA to AH/Amp Hours

Learn the formula of how to convert CCA to Ah


Are you going to purchase a new car battery for your car?

Car batteries have a lot of specifications you should be aware of. Modern cars use many electronic components, and you must get the right battery for your car.

In this article, we will help you to find the information you need about how to find the right car battery for your needs and how you can convert CCA to Ah/ampere-hours.

How to Convert CCA to AH

Electric Law

There is no correlation between CCA and Ah. Therefore you can’t convert it directly to get the exact value.

However, you can get a rule of thumb value for most batteries, even if it’s not an exact value, depending on the battery.

The rule of thumb for converting CCA to Ah is dividing the CCA by 7.25. For instance, if your battery is marked with a 1450 CCA, it represents 200 Ah.

A battery of this rating should last for 25 hours while producing power of 8 amps.

Understanding your rate of use and your voltage level will help you make the right battery choices, even if you only have the CCA figures. Conversely, if you have the Ah ratings on your battery, you can calculate the CCA measurement to determine how suitable your battery is for cranking your engine in cold temperatures.

What Are Ampere Hours (Ah)?

Amp Hours Batteries

The ampere measures the flow of electrons and current within a conductor. A single ampere represents a single coulomb of electrical charge, which passes throughout every part of the conducting item within a second.

Battery measurements are commonly written out in units of ampere-hours (Ah), and milliampere hours (mAh), which represents 1/1000. This unit represents the battery operation threshold, which can calculate how long the battery might last without recharging.

RELATED: AGM vs. GEL Batteries -Differences

What Are Cold Cranking Amps?

Cold Start

Many batteries use CCA to present the battery’s ability to start an engine at certain temperatures, usually ranging between 30-32 degrees Fahrenheit. While knowing this starting power can help you choose a better battery, you will need to convert CCA to AH to determine capacity.

CCA can be a good unit of measure to help you determine the best battery for you if you live in cold conditions. Higher capacity and power batteries will have better CCA values than weaker batteries. Even as the battery power deteriorates over time, they will be more likely to last longer and provide better service.

Even though you cannot calculate battery capacity, you can still determine the best battery for replacement.

Written by: Magnus Sellén

Founder, owner & main author of Mechanic Base. I have been repairing cars for more than 10 years, specialized in advanced diagnostics & troubleshooting. I have also been a drifting driver and mechanic for over 7 years.