All Charge Units

How to Convert Electric Charge Units?

Electric charge is measured in Coulombs (SI unit) or ampere-hours (practical unit for batteries). One Coulomb equals the charge transported by one ampere of current in one second. Converting between Coulombs and ampere-hours requires the relationship: 1 Ah = 3600 C. Our converter handles both scientific prefixes (milli, micro, nano, pico) and practical battery units.

Units

Coulomb (C)

The SI unit of electric charge, named after Charles-Augustin de Coulomb. One Coulomb is the amount of charge transferred by a current of one ampere flowing for one second. It equals approximately 6.242 x 10^18 elementary charges (electrons or protons).

Milliampere-hour (mAh)

The most common unit for battery capacity in consumer electronics. Smartphones typically have 3000-5000 mAh batteries, while wireless earbuds may have 30-60 mAh. One mAh equals 3.6 Coulombs of charge.

Ampere-hour (Ah)

Used for larger batteries such as car batteries, power tools, and energy storage systems. A typical car battery has 40-100 Ah capacity. One Ah equals 1000 mAh or 3600 Coulombs.

Microcoulomb (uC)

Used in scientific measurements and electrostatics. Common in capacitor charge calculations, piezoelectric sensors, and laboratory experiments. One microcoulomb equals 0.000001 Coulombs.

Nanocoulomb (nC)

Used in precision electronics, semiconductor physics, and charge measurements in microchips. Essential for understanding charge transfer in transistors and integrated circuits.

Common Electric Charge Conversions