Coulomb to Milliampere-hour Converter
Convert coulombs to milliampere-hours (C to mAh) instantly with this free online electric-charge converter. Enter any value in the Coulomb field and get the equivalent in Milliampere-hour immediately. This converter handles any quantity — from tiny fractions to large numbers — with full precision. No signup, no ads in the widget, and the conversion runs entirely in your browser for instant results.
The conversion factor is exact: 1 C = 0.2777777778 mAh. To convert coulombs to milliampere-hours, multiply your Coulomb value by 0.2777777778. For example, 10 C = 2.777777778 mAh. You can also reverse the calculation: 1 mAh = 3.6 C.
Quick conversion table
| Coulomb (C) | Milliampere-hour (mAh) |
|---|---|
| 1 C | 0.2777777778 mAh |
| 5 C | 1.388888889 mAh |
| 10 C | 2.777777778 mAh |
| 25 C | 6.944444444 mAh |
| 50 C | 13.88888889 mAh |
| 100 C | 27.77777778 mAh |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the electric-charge category.
Formula
Coulomb to Milliampere-hour conversion: 1 C = 0.2777777778 mAh milliampere-hours = coulombs × 0.2777777778 1 mAh = 3.6 C coulombs = milliampere-hours × 3.6
Example
Example: Convert 10 C to mAh: 10 C × 0.2777777778 = 2.777777778 mAh So, 10 C is about 2.777777778 mAh. To convert back, multiply by 3.6: 2.777777778 mAh × 3.6 = 10 C.
How to Use
- Enter the value you want to convert in the Coulomb field
- The result in Milliampere-hour appears instantly below
- Use the dropdown menus to change units if needed
- Click 'Swap Units' to reverse the conversion direction
- Copy the result or adjust the input for a new conversion
Frequently Asked Questions
How do I convert coulombs to milliampere-hours?
Enter the value in Coulomb (C) in the 'From' field. The equivalent in Milliampere-hour (mAh) appears instantly in the 'To' field. The converter uses precise conversion factors and updates in real time as you type.
What is the formula to convert C to mAh?
1 C = 0.2777777778 mAh, so milliampere-hours = coulombs × 0.2777777778. To convert back, 1 mAh = 3.6 C. The full formula and a worked example are shown on this page.
How many milliampere-hours are in one Coulomb?
1 C = 0.2777777778 mAh.
Is this Coulomb to Milliampere-hour converter free?
Yes, completely free with no signup, no limits, and no ads in the converter widget. You can convert as many values as you need. The tool runs entirely in your browser, so your data never leaves your device.
Can I convert milliampere-hours back to coulombs?
Yes. Click the 'Swap Units' button to reverse the direction. You can also use the dropdown menus to select any other electric-charge unit for either field.
How accurate is the C to mAh conversion?
The converter uses high-precision conversion factors (up to 8 decimal places). Results are displayed with up to 6 decimal places, with trailing zeros removed for readability. For scientific or engineering work, always verify with official standards.