Milliampere-hour to Ampere-hour Converter

1 milliampere-hour is exactly 0.001 ampere-hours. Convert milliampere-hours (mAh) to ampere-hours (Ah) below: type a value and the result updates as you type.

mAh to Ah calculator

Result

Milliampere-hour to Ampere-hour conversion

1 mAh = 0.001 Ahone milliampere-hour in ampere-hours

1 Ah = 1000 mAhone ampere-hour in milliampere-hours

Milliampere-hour (mAh): One thousandth of an ampere-hour: exactly 3.6 C. Phone and power bank batteries are rated in mAh.

Ampere-hour (Ah): The charge of one ampere flowing for one hour: exactly 3600 C. Car and storage batteries are rated in Ah.

Source:SI Brochure, 9th edition (BIPM, 2019)

How to convert milliampere-hours to ampere-hours

To convert milliampere-hours to ampere-hours, multiply the number of milliampere-hours by 0.001.

Formula

Ah = mAh × 0.001

Examples

5 mAh = 5 × 0.001 = 0.005 Ah
25 mAh = 25 × 0.001 = 0.025 Ah
100 mAh = 100 × 0.001 = 0.1 Ah

Milliampere-hour to Ampere-hour conversion table

Milliampere-hour to Ampere-hour
Milliampere-hour (mAh)	Ampere-hour (Ah)
0.1 mAh	0.0001 Ah
0.5 mAh	0.0005 Ah
1 mAh	0.001 Ah
2 mAh	0.002 Ah
3 mAh	0.003 Ah
5 mAh	0.005 Ah
10 mAh	0.01 Ah
20 mAh	0.02 Ah
25 mAh	0.025 Ah
50 mAh	0.05 Ah
100 mAh	0.1 Ah
250 mAh	0.25 Ah
500 mAh	0.5 Ah
1000 mAh	1 Ah

Values rounded to 10 significant digits where needed.

Frequently asked questions

How many ampere-hours are in one milliampere-hour?: One milliampere-hour is exactly 0.001 ampere-hours.
How do I convert ampere-hours to milliampere-hours?: To convert ampere-hours to milliampere-hours, multiply the number of ampere-hours by 1000. The formula is mAh = Ah × 1000.
Is this conversion exact?: Yes. Both units have exact definitions and the factor 0.001 is exact. Displayed results are only rounded when they have many decimal places.
Which is larger, a milliampere-hour or a ampere-hour?: A ampere-hour is 1000 times larger than a milliampere-hour. In other words, a milliampere-hour is exactly 1/1000 of a ampere-hour.