Quick reference table
Common electric charge conversions
| From | To |
|---|---|
| 1 mAh | 3.6 C |
| 1 Ah | 1 mAh |
| 1 C | 0.2777777778 mAh |
| 1 Ah | 3,600 C |
| 1 mC | 1 µC |
How to convert electric charge
Electric charge is measured in coulombs. Batteries are rated in ampere-hours (Ah) or milliampere-hours (mAh), where 1 Ah is 3,600 coulombs.
Every electric charge unit is a fixed multiple of one base unit, the C. To convert a value, multiply it by the size of the starting unit and divide by the size of the target unit. For example, to convert mAh to C, multiply by 3.6. To go the other way, divide by 3.6.
The converter above does this for you and shows the exact formula under the result.
Worked examples
Milliampere-hours to Coulombs
| Milliampere-hours (mAh) | Coulombs (C) |
|---|---|
| 1 mAh | 3.6 C |
| 2 mAh | 7.2 C |
| 5 mAh | 18.0 C |
| 10 mAh | 36.0 C |
| 25 mAh | 90.0 C |
| 50 mAh | 180.0 C |
| 100 mAh | 360.0 C |
| 1,000 mAh | 3,600.0 C |
Ampere-hours to Milliampere-hours
| Ampere-hours (Ah) | Milliampere-hours (mAh) |
|---|---|
| 1 Ah | 1 mAh |
| 2 Ah | 2 mAh |
| 5 Ah | 5 mAh |
| 10 Ah | 1 mAh |
| 25 Ah | 25 mAh |
| 50 Ah | 5 mAh |
| 100 Ah | 1 mAh |
| 1,000 Ah | 1 mAh |
Electric charge units explained
| Unit | Symbol | Equals |
|---|---|---|
| Picocoulombs | pC | 1 pC = 1 × 10⁻¹² C |
| Nanocoulombs | nC | 1 nC = 1 × 10⁻⁹ C |
| Microcoulombs | µC | 1 µC = 0.000001 C |
| Millicoulombs | mC | 1 mC = 0.001 C |
| Coulombs | C | 1 C = 1 C |
| Kilocoulombs | kC | 1 kC = 1,000 C |
| Milliampere-hours | mAh | 1 mAh = 3.6 C |
| Ampere-hours | Ah | 1 Ah = 3,600 C |
| Elementary charges | e | 1 e = 1.602177 × 10⁻¹⁹ C |
| Faradays | F (Faraday) | 1 F (Faraday) = 96,485.33212 C |
Popular conversions: mah to coulombs, ah to mah.
Frequently asked questions
How do I convert mAh to coulombs?
Multiply mAh by 3.6. For example, a 5,000 mAh battery holds 18,000 coulombs of charge.
How many C is 1 mAh?
1 mAh = 3.6 C, and 1 C = 0.2777777778 mAh.
Does this electric charge converter work offline?
Yes. After the page has loaded once, all calculations run in your browser, so it keeps working without an internet connection.