Ampere-hours to Watt-hours Converter
Enter the electric charge in ampere-hours below to convert it to watt-hours.
Convert Ampere-hours to Watt-hours
Enter a value in ampere-hours (Ah) to convert to watt-hours (Wh).
Ampere-hour to Watt-hour Conversion Table
Table showing various ampere-hour measurements converted to watt-hours. Click any preset value or arrow to load it into the converter.
How to Convert Ampere-hours to Watt-hours
To convert ampere-hours to watt-hours, multiply the electric charge by the following conversion ratio: 12 watt-hours/ampere-hour.
Since one ampere-hour is equal to 12 watt-hours, you can use this simple formula to convert:
The electric charge in watt-hours is equal to the electric charge in ampere-hours multiplied by 12.
For example, here's how to convert 100 ampere-hours to watt-hours using the formula above.
How Many Watt-hours Are in an Ampere-hour?
There are 12 watt-hours in an ampere-hour, which is why we use this value in the formula above.
Our ampere-hour to watt-hour calculator automatically converts your electric charge measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Ampere-hours and watt-hours 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 Watt-hour?
A watt-hour is a unit of energy equal to 3,600 joules (J), the base unit for energy. Equal to 3,600 Joules. [2]
The watt-hour is classified as a metric and SI-compatible unit of energy. Watt-hours can be abbreviated as Wh; for example, 1 watt-hour can be written as 1 Wh.
When working with watt-hours (Wh) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, watt-hours (Wh) are widely used across large-scale industrial, bulk, and macro-level energy specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting electric charge between ampere-hours (Ah) and watt-hours (Wh), keep full floating-point precision (1 Ah = 12 Wh; 1 Wh = 0.0833333 Ah) during intermediate calculations and round only the final watt-hour figure to match your instrument tolerance.
More Ampere-hour & Watt-hour Conversions
Need to calculate in the opposite direction? Use our watt-hours to ampere-hours converter (Wh to Ah) to switch your starting unit immediately. You can also explore related tools such as converting milliampere-hours to watt-hours, converting ampere-hours to milliampere-hours, or converting ampere-hours to kilowatt-hours.
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 Watt-hours (Wh)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Electric Current)·Unit Specifications: Ampere-hour (Ah) & Watt-hour (Wh)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9 (1 Ah = 3,600 C))·Conversion Factors & Mathematical Basis (Ah to Wh)