Milliampere-hours to Ampere-hours Converter
Enter the electric charge in milliampere-hours below to convert it to ampere-hours.
Convert Milliampere-hours to Ampere-hours
Enter a value in milliampere-hours (mAh) to convert to ampere-hours (Ah).
Milliampere-hour to Ampere-hour Conversion Table
Table showing various milliampere-hour measurements converted to ampere-hours. Click any preset value or arrow to load it into the converter.
How to Convert Milliampere-hours to Ampere-hours
To convert milliampere-hours to ampere-hours, multiply the electric charge by the following conversion ratio: 0.001 ampere-hours/milliampere-hour.
Since one milliampere-hour is equal to 0.001 ampere-hours, you can use this simple formula to convert:
The electric charge in ampere-hours is equal to the electric charge in milliampere-hours multiplied by 0.001.
For example, here's how to convert 5000 milliampere-hours to ampere-hours using the formula above.
How Many Ampere-hours Are in a Milliampere-hour?
There are 0.001 ampere-hours in a milliampere-hour, which is why we use this value in the formula above.
Our milliampere-hour to ampere-hour calculator automatically converts your electric charge measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milliampere-hours and ampere-hours are both units used to measure electric charge. Keep reading to learn more about each unit.
What Is a Milliampere-hour?
A milliampere-hour is a unit of electric charge equal to 3.6 coulombs (C), the base unit for electric charge. Battery capacity unit equal to 0.001 Ah or 3.6 Coulombs. [1]
The milliampere-hour is classified as a standard unit of electric charge. Milliampere-hours can be abbreviated as mAh; for example, 1 milliampere-hour can be written as 1 mAh.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliampere-hour (mAh) a convenient decimal multiple of the coulomb (C).
In practice, milliampere-hours (mAh) are widely used across standard electric charge applications within international standard workflows, engineering documentation, and technical data sheets.
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). [2]
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.
When converting electric charge between milliampere-hours (mAh) and ampere-hours (Ah), keep full floating-point precision (1 mAh = 0.001 Ah; 1 Ah = 1,000 mAh) during intermediate calculations and round only the final ampere-hour figure to match your instrument tolerance.
More Milliampere-hour & Ampere-hour Conversions
Need to calculate in the opposite direction? Use our ampere-hours to milliampere-hours converter (Ah to mAh) to switch your starting unit immediately. You can also explore related tools such as converting kilowatt-hours to ampere-hours, converting watt-hours to ampere-hours, or converting milliampere-hours to coulombs.
Convert from Milliampere-hours
Frequently Asked Questions
References
- [1]NIST CUU StandardNIST CUU (Derived SI Unit: Coulomb (C))·Electric Charge Metrology Standard — Milliampere-hours (mAh) to Ampere-hours (Ah)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Electric Current)·Unit Specifications: Milliampere-hour (mAh) & Ampere-hour (Ah)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9 (1 Ah = 3,600 C))·Conversion Factors & Mathematical Basis (mAh to Ah)