Milliampere-hours to ampere-hours
Type a value in milliampere-hours to see it in ampere-hours straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the milliampere-hours box.
- Read the result in ampere-hours as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
Ah = mAh × 0.001
Multiply the value in milliampere-hours by 0.001 to get ampere-hours.
Example
To convert 25 mAh to ampere-hours: 25 × 0.001 = 0.025 Ah.
Conversion table
| Milliampere-hours (mAh) | Ampere-hours (Ah) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
About the units
- Milliampere-hour
- One thousandth of an ampere-hour, exactly 3.6 coulombs, the figure printed on phone batteries and power banks.
- Ampere-hour
- The charge moved by one ampere flowing for one hour, exactly 3600 coulombs, used for car and solar battery capacity.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many ampere-hours are in one milliampere-hour?
1 mAh = 0.001 Ah exactly.
How do I convert milliampere-hours to ampere-hours?
Use Ah = mAh × 0.001. For example, 25 mAh = 0.025 Ah.
How many milliampere-hours are in one ampere-hour?
1 Ah = 1,000 mAh.
How do I convert battery mAh to watt-hours?
You need the battery voltage: Wh equals mAh times volts divided by 1000. A 5000 mAh battery at 3.7 V holds 18.5 Wh.
How many coulombs are in an ampere-hour?
Exactly 3600 coulombs, because an ampere-hour is one ampere flowing for 3600 seconds.