# Coulomb Conversion Calculator

Enter a value in coulombs below to convert to another unit of electric charge.

## What Is a Coulomb?

A coulomb is a unit used to measure electric charge.

The coulomb is the SI derived unit for electric charge in the metric system. Coulombs can be abbreviated as C; for example, 1 coulomb can be written as 1 C.

### Background and Origin

Coulombs are named in honor of Charles-Augustin de Coulomb who published a law quantifying the force between two electrically charged particles in 1785. This law is known today as Coulomb's Law. The coulomb was named as a unit of electromotive force in 1881.

## How Much Is a Coulomb?

One coulomb is the electric charge equal to one ampere of current over one second.[1]

The coulomb can be expressed as QC = IA × ts

The charge in coulombs is equal to the current in amperes times the time in seconds.

## How to Convert Coulombs

To convert coulombs to another unit of electric charge, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[2]

You can find the conversion factors for coulombs in the conversion table below.

Then, multiply the electric charge measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

coulombs × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

## Coulomb Conversion Table

Common coulomb values and equivalent imperial and metric electric charge measurements
coulombs millicoulombs microcoulombs nanocoulombs picocoulombs statcoulombs abcoulombs electron charge ampere-hours milliampere-hours
1 C 1,000 mC 1,000,000 μC 1,000,000,000 nC 1,000,000,000,000 pC 2,997,920,000 stC 0.1 abC 6,241,500,000,000,000,000 e 0.000278 Ah 0.277778 mAh
2 C 2,000 mC 2,000,000 μC 2,000,000,000 nC 2,000,000,000,000 pC 5,995,840,000 stC 0.2 abC 12,483,000,000,000,000,000 e 0.000556 Ah 0.555556 mAh
3 C 3,000 mC 3,000,000 μC 3,000,000,000 nC 3,000,000,000,000 pC 8,993,760,000 stC 0.3 abC 18,725,000,000,000,000,000 e 0.000833 Ah 0.833333 mAh
4 C 4,000 mC 4,000,000 μC 4,000,000,000 nC 4,000,000,000,000 pC 11,991,680,000 stC 0.4 abC 24,966,000,000,000,000,000 e 0.001111 Ah 1.111111 mAh
5 C 5,000 mC 5,000,000 μC 5,000,000,000 nC 5,000,000,000,000 pC 14,989,600,000 stC 0.5 abC 31,208,000,000,000,000,000 e 0.001389 Ah 1.388889 mAh
6 C 6,000 mC 6,000,000 μC 6,000,000,000 nC 6,000,000,000,000 pC 17,987,520,000 stC 0.6 abC 37,449,000,000,000,000,000 e 0.001667 Ah 1.666667 mAh
7 C 7,000 mC 7,000,000 μC 7,000,000,000 nC 7,000,000,000,000 pC 20,985,440,000 stC 0.7 abC 43,691,000,000,000,000,000 e 0.001944 Ah 1.944444 mAh
8 C 8,000 mC 8,000,000 μC 8,000,000,000 nC 8,000,000,000,000 pC 23,983,359,999 stC 0.8 abC 49,932,000,000,000,000,000 e 0.002222 Ah 2.222222 mAh
9 C 9,000 mC 9,000,000 μC 9,000,000,000 nC 9,000,000,000,000 pC 26,981,279,999 stC 0.9 abC 56,174,000,000,000,000,000 e 0.0025 Ah 2.5 mAh
10 C 10,000 mC 10,000,000 μC 10,000,000,000 nC 10,000,000,000,000 pC 29,979,199,999 stC 1 abC 62,415,000,000,000,000,000 e 0.002778 Ah 2.777778 mAh
11 C 11,000 mC 11,000,000 μC 11,000,000,000 nC 11,000,000,000,000 pC 32,977,119,999 stC 1.1 abC 68,657,000,000,000,000,000 e 0.003056 Ah 3.055556 mAh
12 C 12,000 mC 12,000,000 μC 12,000,000,000 nC 12,000,000,000,000 pC 35,975,039,999 stC 1.2 abC 74,898,000,000,000,000,000 e 0.003333 Ah 3.333333 mAh
13 C 13,000 mC 13,000,000 μC 13,000,000,000 nC 13,000,000,000,000 pC 38,972,959,999 stC 1.3 abC 81,140,000,000,000,000,000 e 0.003611 Ah 3.611111 mAh
14 C 14,000 mC 14,000,000 μC 14,000,000,000 nC 14,000,000,000,000 pC 41,970,879,999 stC 1.4 abC 87,381,000,000,000,000,000 e 0.003889 Ah 3.888889 mAh
15 C 15,000 mC 15,000,000 μC 15,000,000,000 nC 15,000,000,000,000 pC 44,968,799,999 stC 1.5 abC 93,623,000,000,000,000,000 e 0.004167 Ah 4.166667 mAh
16 C 16,000 mC 16,000,000 μC 16,000,000,000 nC 16,000,000,000,000 pC 47,966,719,999 stC 1.6 abC 99,864,000,000,000,000,000 e 0.004444 Ah 4.444444 mAh
17 C 17,000 mC 17,000,000 μC 17,000,000,000 nC 17,000,000,000,000 pC 50,964,639,999 stC 1.7 abC 106,110,000,000,000,000,000 e 0.004722 Ah 4.722222 mAh
18 C 18,000 mC 18,000,000 μC 18,000,000,000 nC 18,000,000,000,000 pC 53,962,559,999 stC 1.8 abC 112,350,000,000,000,000,000 e 0.005 Ah 5 mAh
19 C 19,000 mC 19,000,000 μC 19,000,000,000 nC 19,000,000,000,000 pC 56,960,479,999 stC 1.9 abC 118,590,000,000,000,000,000 e 0.005278 Ah 5.277778 mAh
20 C 20,000 mC 20,000,000 μC 20,000,000,000 nC 20,000,000,000,000 pC 59,958,399,999 stC 2 abC 124,830,000,000,000,000,000 e 0.005556 Ah 5.555556 mAh

## Coulomb Conversion Calculators

You can also convert electric charge using one of our coulomb converters below.

SI Units
Centimetre–Gram–Second Units
Other Units

You might also find our other electrical calculators useful.

## References

1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf
2. National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion

## Other Electric Charge Units

SI Units
Centimetre–Gram–Second Units
Other Units