Convert

Ampere hour to Coulomb

Exact answer: 1 Ah = 3600 C (exact defined factor)

Ampere hour and Coulomb 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?

From0.5 Ah

Result1,800 C

Factor1 Ah = 3600 C

Source basisBIPM SI Brochure · NIST Guide to SI Appendix B

Examples

010.5 Ah = 1,800 C

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 Ah = 3600 C. Then the value is converted through the base unit C into Coulomb.

Table

Ampere hour to Coulomb
Ampere hour	Coulomb
0.5	1,800
1	3,600
2	7,200
5	18,000
10	36,000
100	360,000

Formula

1 Ah = 3600 C. Then the value is converted through the base unit C into Coulomb.

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 Coulomb to Ampere hourC → AhElectric charge Milliampere hour to CoulombmAh → CElectric charge

Search and practice paths

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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 Ampere hour to Coulomb?

1 Ah = 3600 C

Which formula does Ampere hour to Coulomb use?

1 Ah = 3600 C. Then the value is converted through the base unit C into Coulomb.

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.