Unit console

Convert units with formula, context and precision

UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

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Unit family

Electric charge

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. Charge appears with batteries, power banks, capacitors and in electrical engineering.

Electric charge
Unit	Symbol	Formula
Coulomb	C	base
Millicoulomb	mC	1 mC = 0.001 C
Kilocoulomb	kC	1 kC = 1000 C
Ampere hour	Ah	1 Ah = 3600 C
Milliampere hour	mAh	1 mAh = 3.6 C

Direct conversions

Every maintained pair of this family with formula, table and common mistake.

All 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 Milliampere hour to CoulombmAh → CElectric charge Coulomb to Milliampere hourC → mAhElectric charge Kilocoulomb to Ampere hourkC → AhElectric charge

Base unitC

UnitCloud is a calculation aid. Standards, contracts, medical decisions, engineering approvals and official requirements need original sources.

Units5

Every unit of this family converts through the same base unit.

Direct conversions7

Maintained pairs with their own page, table and common mistake.

Sources

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

Search and practice paths

FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view

Electric chargeComparing batteries: mAh, Ah and Wh Data rateReading internet speed correctly

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.