Convert coulombs to ampere-hours
1 C = 0.000277777777778 Ah — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.000 277 777 777 778Ah
As a fraction: 1/3600
More converter tools
Readable results
Ranges, ± tolerances, feet/inches and clock durations work in the value field.
Unit picker
Export this result
1 C = 0.000277777777778 Ah
Show this value in all 13 electric charge units
- Kilocoulombs kC 0.001
- Coulombs C 1
- Millicoulombs mC 1000
- Microcoulombs µC 1 000 000
- Nanocoulombs nC 1 000 000 000
- Picocoulombs pC 1 000 000 000 000
- Ampere-hours Ah 0.000 277 777 777 778
- Milliampere-hours mAh 0.277 777 777 778
- Ampere-minutes A·min 0.016 666 666 666 7
- Faradays F 0.000 010 364 269 656 3
- Elementary charges e 6.24150907446e+18
- Abcoulombs abC 0.1
- Statcoulombs statC 29 979 245.8
Every row is Coulomb (C) converted through the coulomb, in exact rational arithmetic.
How to convert coulombs to ampere-hours
Multiply the number of coulombs by 0.000277777777778 to get ampere-hours.
Ampere-hour: Battery capacity. Multiply by the pack voltage to get watt-hours.
Coulomb to Ampere-hour conversion table
| Coulombs (C) | Ampere-hours (Ah) |
|---|---|
| 1 C | 0.000 277 777 78 |
| 2 C | 0.000 555 555 56 |
| 3 C | 0.000 833 333 33 |
| 5 C | 0.001 388 888 9 |
| 10 C | 0.002 777 777 8 |
| 20 C | 0.005 555 555 6 |
| 25 C | 0.006 944 444 4 |
| 50 C | 0.013 888 889 |
| 100 C | 0.027 777 778 |
| 250 C | 0.069 444 444 |
| 500 C | 0.138 888 89 |
| 1000 C | 0.277 777 78 |
Ampere-hour to Coulomb conversion table
| Ampere-hours (Ah) | Coulombs (C) |
|---|---|
| 1 Ah | 3600 |
| 2 Ah | 7200 |
| 3 Ah | 10 800 |
| 5 Ah | 18 000 |
| 10 Ah | 36 000 |
| 20 Ah | 72 000 |
| 25 Ah | 90 000 |
| 50 Ah | 180 000 |
| 100 Ah | 360 000 |
| 250 Ah | 900 000 |
| 500 Ah | 1 800 000 |
| 1000 Ah | 3 600 000 |
Frequently asked
How many ampere-hours are in a coulomb?
One coulomb equals 0.0002777777778 ampere-hours (C → Ah). That figure is exact, not rounded.
How do you convert coulombs to ampere-hours?
Multiply the number of coulombs by 0.000277777777778 to get ampere-hours.
What is 1 Ah in coulombs?
One ampere-hour is 3600 coulombs.
What is 10 C in Ah?
10 C = 0.002 777 777 8 Ah.
What exactly is a ampere-hour?
Battery capacity. Multiply by the pack voltage to get watt-hours.