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Milliampere-hours to Ampere-hours Conversion

One milliampere-hour is one thousandth of an ampere-hour, so a charge given in milliamp-hours turns into amp-hours by dividing by 1000. Enter a value and press Convert to get the result right away.

Milliampere-hours and ampere-hours

Both units measure electric charge. The milliampere-hour is the smaller of the two: exactly 1/1000 of an ampere-hour, which also means one ampere-hour equals 1000 milliampere-hours.

Because the relationship is a plain factor of one thousand, a charge of 1000 mAh and a charge of 1 Ah describe the same amount of charge, only written in different units.

Using the converter

Type the charge in milliampere-hours into the input and press Convert. The ampere-hour value appears in a card below the buttons, and you can copy it or clear the field to run another conversion.

mAh to Ah formula

To get the charge Q(Ah) in ampere-hours, divide the milliampere-hour figure Q(mAh) by 1000:

Q(Ah) = Q(mAh) / 1000

For example, converting 3 milliampere-hours gives Q(Ah) = 3 mAh / 1000 = 0.003 Ah.