Watt-Hours to Amp-Hours Converter
Convert battery capacity from watt-hours (Wh) to amp-hours (Ah) by entering the energy in watt-hours and the battery voltage below.
Watt-Hours to Amp-Hours Conversion Table
| Watt-hours (Wh) | Voltage (V) | Amp-hours (Ah) |
|---|---|---|
| 100 | 12 | 8.33 |
| 200 | 12 | 16.67 |
| 500 | 12 | 41.67 |
| 1000 | 12 | 83.33 |
| 100 | 24 | 4.17 |
| 200 | 24 | 8.33 |
| 500 | 24 | 20.83 |
| 1000 | 24 | 41.67 |
| 100 | 48 | 2.08 |
| 1000 | 48 | 20.83 |
| 5000 | 48 | 104.17 |
| 10000 | 48 | 208.33 |
Understanding Watt-Hours and Amp-Hours
What are Watt-Hours (Wh)?
Watt-hours (Wh) are a unit of energy commonly used to measure battery capacity. They represent the amount of energy a battery can supply to a load. One watt-hour equals one watt of power sustained for one hour.
What are Amp-Hours (Ah)?
Amp-hours (Ah) are a unit of electric charge that indicates how much current a battery can supply over time. One amp-hour equals one ampere of current flowing for one hour.
Conversion Formula
To convert from watt-hours to amp-hours, use this formula:
This formula is derived from the relationship between power, current, and voltage in electrical systems:
Therefore:
Rearranging to solve for charge:
Conversion Examples
Example 1: Convert 600 Wh at 12 V to Ah
This means a 600 Wh battery operating at 12 V has a charge capacity of 50 Ah.
Example 2: Convert 1200 Wh at 24 V to Ah
Notice that doubling both the watt-hours and voltage results in the same amp-hour rating.
Practical Applications
Understanding the relationship between watt-hours and amp-hours is crucial when:
- Selecting batteries for solar power systems
- Calculating runtime for electrical devices
- Comparing different battery specifications
- Designing power backup systems
- Sizing batteries for electric vehicles
Related Conversions
You can also convert in the opposite direction:
For kilowatt-hours to amp-hours:
For watt-hours to milliamp-hours: