Convert

Coulomb to Milliampere hour

Exact answer: 1 C = 0.277777777778 mAh (exact defined factor)

Coulomb and Milliampere hour describe the same quantity from the Electric charge family but come from different systems of units. The factor is defined exactly. Charge appears with batteries, power banks, capacitors and in electrical engineering.

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What do you want to convert?

From3.6 C

Result1 mAh

Factor1 C = 0.277777777778 mAh

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

013.6 C = 1 mAh

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

Ampere hours measure charge, watt hours measure energy. mAh and Wh are only linked through voltage: Wh = Ah × volts. Two batteries with identical mAh can store different amounts of energy.

03Base unit: C

1 C = 0.277777777778 mAh. Coulomb is the base unit of the family, so the value is converted directly.

Table

Coulomb to Milliampere hour
Coulomb	Milliampere hour
3.6	1
36	10
360	100
3,600	1,000
7,200	2,000
18,000	5,000

Formula

1 C = 0.277777777778 mAh. Coulomb is the base unit of the family, so the value is converted directly.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

Related conversions

Ampere hour to Milliampere hourAh → mAhElectric charge Milliampere hour to Ampere hourmAh → AhElectric charge Ampere hour to CoulombAh → CElectric charge Coulomb to Ampere hourC → AhElectric charge

Search and practice paths

FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view

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Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources reviewed: September 2026. Electric charge. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.

Common questions

What is the factor for Coulomb to Milliampere hour?

1 C = 0.277777777778 mAh

Which formula does Coulomb to Milliampere hour use?

1 C = 0.277777777778 mAh. Coulomb is the base unit of the family, so the value is converted directly.

What is the most common mistake?

Ampere hours measure charge, watt hours measure energy. mAh and Wh are only linked through voltage: Wh = Ah × volts. Two batteries with identical mAh can store different amounts of energy.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.