Use this free, accurate coulomb to ampere-hour (ah) calculator to convert between Coulomb (C) and Ampere-hour (Ah) (Ah). Includes live instant results, complete mathematical formulas, conversion tables, and step-by-step examples.
0.0002777778 Ampere-hour
1 C is equal to 0.000278 Ah.
Ah = C × 0.00027778
electric-charge Converters
To convert from Coulomb to Ampere-hour (Ah), multiply the value in Coulomb by 0.000278 (or use the formula: Ah = C × 0.000278).
Take your initial measurement in Coulomb (C). For instance, let's convert 1 C.
Multiply by the standard conversion factor (0.000278).
The final converted measurement equals 0.000278 Ampere-hour (Ah) (Ah).
Compare standard reference values and common conversion benchmarks.
| Coulomb (C) | Ampere-hour (Ah) (Ah) | Action |
|---|---|---|
| 1 C | 0.00028 Ah | |
| 2 C | 0.00056 Ah | |
| 3 C | 0.00083 Ah | |
| 5 C | 0.00139 Ah | |
| 10 C | 0.00278 Ah | |
| 15 C | 0.00417 Ah | |
| 20 C | 0.00556 Ah | |
| 25 C | 0.00694 Ah | |
| 50 C | 0.01389 Ah | |
| 75 C | 0.02083 Ah | |
| 100 C | 0.02778 Ah | |
| 250 C | 0.06944 Ah | |
| 500 C | 0.13889 Ah | |
| 1000 C | 0.27778 Ah |
Official standards, measurement systems, and real-world everyday applications.
A coulomb is the SI base derived unit of electric charge, equal to the charge transferred by a constant current of one ampere in one second (1 A·s).
Common Practical Uses
An ampere-hour is a unit of electric charge equal to 3,600 coulombs (1,000 mAh), standard for large vehicle and solar batteries.
Common Practical Uses
Calculate from Ampere-hour (Ah) (Ah) back to Coulomb (C).
Frequently used unit conversions in this category:
Explore other measurement and calculation tools:
There are 0.000278 ampere-hours in 1 coulombs. Exactly 1 C is equal to 0.000278 Ah.
The conversion formula is: Ampere-hour (Ah) = Ah = C × 0.00027778. Applying this to 1 C gives: 1 × 0.000278 = 0.000278 Ah.
To convert in reverse from ampere-hours to coulombs, multiply by the inverse factor: 1 Ah = 3600 C. Alternatively, divide your Ampere-hour (Ah) amount by 0.000278.
For quick estimates, divide the Coulomb value by 3600.
Coulomb (C) belongs to the Metric (SI) system, commonly used in Electrostatics, Capacitor charge storage (Q = CV), Physics formulas. In comparison, Ampere-hour (Ah) (Ah) is part of the Industrial Battery system, frequently applied in Car lead-acid batteries (e.g. 60 Ah), Solar energy storage banks, Marine boat batteries.
Key milestones include: 1 C = 0.000278 Ah, 5 C = 0.0014 Ah, 10 C = 0.0028 Ah, 50 C = 0.0139 Ah, and 100 C = 0.0278 Ah.