Electric Charge Converter

Convert any electric charge unit to another with this free electric charge converter. It supports 6 units including coulombs, millicoulombs, microcoulombs, nanocoulombs, ampere-hours, milliampere-hours. Pick a conversion below for a dedicated calculator, formula, and reference table. For example, 1 C = 1000 mC.

All electric charge conversions

Coulomb → Millicoulomb Coulomb → Microcoulomb Coulomb → Nanocoulomb Coulomb → Ampere-hour Coulomb → Milliampere-hour Millicoulomb → Coulomb Millicoulomb → Microcoulomb Millicoulomb → Nanocoulomb Millicoulomb → Ampere-hour Millicoulomb → Milliampere-hour Microcoulomb → Coulomb Microcoulomb → Millicoulomb Microcoulomb → Nanocoulomb Microcoulomb → Ampere-hour Microcoulomb → Milliampere-hour Nanocoulomb → Coulomb Nanocoulomb → Millicoulomb Nanocoulomb → Microcoulomb Nanocoulomb → Ampere-hour Nanocoulomb → Milliampere-hour Ampere-hour → Coulomb Ampere-hour → Millicoulomb Ampere-hour → Microcoulomb Ampere-hour → Nanocoulomb Ampere-hour → Milliampere-hour Milliampere-hour → Coulomb Milliampere-hour → Millicoulomb Milliampere-hour → Microcoulomb Milliampere-hour → Nanocoulomb Milliampere-hour → Ampere-hour

About these units

Coulomb (C)

Definition: The coulomb (C) is the SI unit of electric charge, defined as the charge transported by one ampere of current in one second.
History: Named after French physicist Charles-Augustin de Coulomb, it was formalised with the SI system and redefined in 2019 in terms of the elementary charge.
Current use: Coulombs are used in electrochemistry, capacitor ratings, and electrostatics calculations.

Millicoulomb (mC)

Definition: A millicoulomb (mC) is one thousandth of a coulomb.
History: A metric sub-multiple of the coulomb.
Current use: Used in small capacitor and electrostatic discharge calculations.

Microcoulomb (µC)

Definition: A microcoulomb (µC) is one millionth of a coulomb.
History: A metric sub-multiple of the coulomb.
Current use: Common in electrostatic and sensor circuit analysis.

Nanocoulomb (nC)

Definition: A nanocoulomb (nC) is one billionth of a coulomb.
History: A metric sub-multiple used in low-charge applications.
Current use: Found in precision capacitor and MEMS device specifications.

Ampere-hour (Ah)

Definition: An ampere-hour (Ah) is a unit of electric charge equal to 3,600 coulombs — the charge transferred by one ampere flowing for one hour.
History: It came into widespread use with the commercialisation of lead-acid batteries in the late 19th century.
Current use: Ampere-hours rate battery capacity in electric vehicles, uninterruptible power supplies, and solar storage systems.

Milliampere-hour (mAh)

Definition: A milliampere-hour (mAh) is one thousandth of an ampere-hour, equal to 3.6 coulombs.
History: It became the standard consumer electronics capacity unit as portable devices shrank.
Current use: Battery capacity of smartphones, earbuds, and wearables is universally quoted in mAh.

Frequently asked questions

What electric charge units can I convert?

This electric charge converter supports 6 units: coulombs, millicoulombs, microcoulombs, nanocoulombs, ampere-hours, milliampere-hours. Select any pair below to open a dedicated converter with a formula and conversion table.

How accurate is the electric charge converter?

Conversions use exact definitional factors, so results are accurate to the precision you need for science, engineering, and everyday use. Values are rounded only for display.

Is the electric charge converter free?

Yes. Every electric charge conversion is completely free, needs no sign-up, and runs entirely in your browser — your inputs never leave your device.

Free, private, and instant — every conversion runs in your browser.

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