Charge Converter
Convert between pC, nC, µC, mC, C, mAh, Ah. Free, with no limits and no account needed.
About Charge Units
Electric charge is measured in coulombs (C), with milliamp-hours (mAh) used for battery capacity.
Battery capacity is almost always given in milliamp-hours: a 2000 mAh cell can supply 2000 mA for one hour, or 200 mA for ten. Converting between coulombs and milliamp-hours (1 mAh = 3.6 C) connects datasheet ratings to the current draw you measure.
Example conversions
- 2000 mAh = 7200 C — a typical 18650 cell.
- 225 mAh = 810 C — a CR2032 coin cell.
Frequently asked questions
How do I convert milliamp-hours to coulombs?
Multiply by 3.6. 2000 mAh is 7200 C.
How do I convert amp-hours to milliamp-hours?
Multiply by 1000. 2.5 Ah is 2500 mAh.
How do I convert coulombs to milliamp-hours?
Divide by 3.6. 7200 C is 2000 mAh.
Related converters
Charge is closely related to these quantities in everyday electronics work.