Ampere-hours to Coulombs Converter
Enter the electric charge in ampere-hours below to convert it to coulombs.
Convert Ampere-hours to Coulombs
Enter a value in ampere-hours (Ah) to convert to coulombs (C).
Ampere-hour to Coulomb Conversion Table
Table showing various ampere-hour measurements converted to coulombs. Click any preset value or arrow to load it into the converter.
How to Convert Ampere-hours to Coulombs
To convert ampere-hours to coulombs, multiply the electric charge by the following conversion ratio: 3,600 coulombs/ampere-hour.
Since one ampere-hour is equal to 3,600 coulombs, you can use this simple formula to convert:
The electric charge in coulombs is equal to the electric charge in ampere-hours multiplied by 3,600.
For example, here's how to convert 5 ampere-hours to coulombs using the formula above.
How Many Coulombs Are in an Ampere-hour?
There are 3,600 coulombs in an ampere-hour, which is why we use this value in the formula above.
Our ampere-hour to coulomb calculator automatically converts your electric charge measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Ampere-hours and coulombs are both units used to measure electric charge. Keep reading to learn more about each unit.
What Is an Ampere-hour?
An ampere-hour is a unit of electric charge equal to 3,600 coulombs (C), the base unit for electric charge. Battery charge capacity unit equal to 3,600 Coulombs (1,000 mAh). [1]
The ampere-hour is classified as a standard unit of electric charge. Ampere-hours can be abbreviated as Ah; for example, 1 ampere-hour can be written as 1 Ah.
When working with ampere-hours (Ah) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, ampere-hours (Ah) are widely used across large-scale industrial, bulk, and macro-level electric charge specifications within international standard workflows, engineering documentation, and technical data sheets.
What Is a Coulomb?
SI unit of electric charge (1 A·s). It serves as a primary reference unit for measuring electric charge across scientific and practical applications. [2]
The coulomb is classified as an International System of Units (SI) unit of electric charge. Coulombs can be abbreviated as C; for example, 1 coulomb can be written as 1 C.
As the primary coherent reference unit for electric charge in this category, all other electric charge units are mathematically anchored to the coulomb (C).
In practice, coulombs (C) are widely used across standard electric charge applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting electric charge between ampere-hours (Ah) and coulombs (C), keep full floating-point precision (1 Ah = 3,600 C; 1 C = 0.000277778 Ah) during intermediate calculations and round only the final coulomb figure to match your instrument tolerance.
More Ampere-hour & Coulomb Conversions
Need to calculate in the opposite direction? Use our coulombs to ampere-hours calculator to switch your starting unit immediately. You can also explore related tools such as converting coulombs to ampere-hours, converting microcoulombs to coulombs, or converting nanocoulombs to coulombs.
Convert from Ampere-hours
Frequently Asked Questions
References
- [1]NIST CUU StandardNIST CUU (Derived SI Unit: Coulomb (C))·Electric Charge Metrology Standard — Ampere-hours (Ah) to Coulombs (C)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Electric Current)·Unit Specifications: Ampere-hour (Ah) & Coulomb (C)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9 (1 Ah = 3,600 C))·Conversion Factors & Mathematical Basis (Ah to C)