Coulombs to Ampere-hours Converter
Convert coulombs (C) to ampere-hours (Ah), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter an electric charge, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 C = 0.000277777777778 Ah
- 1 × 0.000277777777778 = 0.000277777777778 Ah
How to convert coulombs to ampere-hours
1 Ah = 3,600 C, so divide by 3,600 to go from coulombs to ampere-hours (1 C = 0.000277777777778 Ah).
Ah = C ÷ 3,600 C = Ah × 3,600
Worked example:
1 C = 0.000277777777778 Ah 5 × 0.000277777777778 = 0.00138888888889 Ah
Coulombs to ampere-hours table
| Coulombs | Ampere-hours |
|---|---|
| 1 C | 0.000277777777778 Ah |
| 2 C | 0.000555555555556 Ah |
| 3 C | 0.000833333333333 Ah |
| 4 C | 0.00111111111111 Ah |
| 5 C | 0.00138888888889 Ah |
| 6 C | 0.00166666666667 Ah |
| 7 C | 0.00194444444444 Ah |
| 8 C | 0.00222222222222 Ah |
| 9 C | 0.0025 Ah |
| 10 C | 0.00277777777778 Ah |
| 15 C | 0.00416666666667 Ah |
| 20 C | 0.00555555555556 Ah |
| 25 C | 0.00694444444444 Ah |
| 30 C | 0.00833333333333 Ah |
| 40 C | 0.0111111111111 Ah |
| 50 C | 0.0138888888889 Ah |
| 75 C | 0.0208333333333 Ah |
| 100 C | 0.0277777777778 Ah |
| 250 C | 0.0694444444444 Ah |
| 500 C | 0.138888888889 Ah |
| 1000 C | 0.277777777778 Ah |
About the units
- Coulombs (C)
- Coulombs, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
- Ampere-hours (Ah)
- Ampere-hours, a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.