milliampere-hour to ampere-hour
Convert milliampere-hour (mAh) to ampere-hour (Ah). Use an editable electric charge converter, conversion formula, and reference table.
1 mAh = 0.001 Ah
Conversion formula
One milliampere-hour equals 0.001 ampere-hour. Multiply your value in milliampere-hour by this factor to get ampere-hour. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 milliampere-hour:5 × 0.001 = 0.005 Ah
Conversion table
| milliampere-hour (mAh) | ampere-hour (Ah) |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1000 | 1 |
About these measurements
Electric charge can be expressed in coulombs or ampere-hours.
The base reference used here is the coulomb. One milliampere-hour is 3.6 base units; one ampere-hour is 3,600 base units.
Important distinctions
Ampere-hours are charge, not energy. Battery voltage is needed to calculate watt-hours.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert mAh to Ah?
Multiply the quantity in mAh by 0.001. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the ampere-hour to milliampere-hour converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
