Coulombs to Milliampere-hours

Snapshot

1 Coulomb equals 0.277778 Milliampere-hours. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses exact coulomb-based electric charge definitions.
Example: For 0.001 Coulombs, the result equals 0.000277777778 Milliampere-hours.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Converter Calculator

0.277778 Milliampere-hours (mAh)

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Explanation

Formula: Milliampere-hours = Coulombs × 0.277778. Why: ampere-hour units convert to charge through current over time, with 1 Ah = 3600 C exactly and 1 mAh = 3.6 C exactly, while coulomb-prefixed units scale by exact powers of ten.

Coulombs (C): the SI unit of electric charge, defined by the exact current-time relationship 1 C = 1 A·s.

Milliampere-hours (mAh): a battery-scale electric-charge unit equal to one thousandth of an ampere-hour, commonly used for small batteries and portable electronics.

This route is mainly useful when switching between battery-capacity style units and standard SI charge units while keeping the same physical quantity.

This conversion is purely multiplicative with no offset because both units reduce exactly to coulombs under the same electric-charge model.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Coulomb = 0.277778 Milliampere-hours.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Coulombs (C)	Milliampere-hours (mAh)
0.001	0.000277777778
0.01	0.002778
0.1	0.027778
1	0.277778
10	2.777778
100	27.777778
1,000	277.777778
5,000	1,388.889

Frequently Asked Questions

What is 1 coulomb in milliampere-hours?

1 Coulomb equals 0.277778 Milliampere-hours on this page.

Does this Coulombs to Milliampere-hours page use 1 Ah = 3600 C?

Yes. Routes that involve ampere-hours convert through the exact current-time relationship 1 Ah = 3600 C, then apply any needed SI prefix scaling.

When would I convert coulombs to milliampere-hours?

This route is mainly useful when switching between battery-capacity style units and standard SI charge units while keeping the same physical quantity.

How do I reverse Coulombs to Milliampere-hours?

Use the mirror Milliampere-hours to Coulombs route; it applies the inverse relationship with the same electric-charge assumptions.