Coulomb to Ampere-Hour Conversion

Convert between Coulomb and Ampere-Hour quickly and accurately.

From Coulomb

To Ampere-Hour

A·h

How to Convert Coulomb to Ampere-Hour

Conversion Formula

1 C = 0 A·h

1 A·h = 3600 C

Example

Convert 15 C to A·h:

15 C = 15 × 0 A·h = 0.004 A·h

Unit Information

Learn about the charge units you're converting between

Coulomb

Definition

The coulomb is the SI base unit of electric charge, representing the amount of electric charge transported by a constant current of one ampere flowing for one second. It is named after French physicist Charles-Augustin de Coulomb.

History/Origin

The coulomb was first defined in 1881 by the International Electrical Congress and became part of the SI system in 1960. It honors Charles-Augustin de Coulomb (1736-1806), who formulated Coulomb's law describing the electrostatic force between charged particles.

Current Use

Coulomb is the fundamental unit for measuring electric charge in physics, engineering, and electronics. It's used in calculations involving capacitance, electric fields, and electromagnetic phenomena.

Multiplier

Offset

Ampere-Hour

A·h

Definition

Ampere-hour is a unit of electric charge equal to the charge transferred by a current of one ampere flowing for one hour, equivalent to 3,600 coulombs.

History/Origin

Ampere-hour was introduced as a practical unit for measuring battery capacity and electrical charge in time-based applications. It combines current (ampere) with time (hour).

Current Use

Widely used for measuring battery capacity, electric vehicle range, and electrical energy storage. Common in automotive, electronics, and renewable energy applications.

Multiplier

3600

Offset