Amperes Conversion

The ampere is a unit used to measure electric current. Use one of the conversion calculators below to convert to another unit of measure, or read on to learn more about amperes.

Ampere Conversion Calculators

Choose a unit of electric current to convert to.

SI Units
Convert amperes to milliamperes
1 ampere is equal to 1,000 milliamperes
Convert amperes to kiloamperes
1 ampere is equal to 0.001 kiloamperes
Convert amperes to megaamperes
1 ampere is equal to 1.0E-6 megaamperes
Centimetre–Gram–Second Units
Convert amperes to biots
1 ampere is equal to 0.1 biots
Convert amperes to abamperes
1 ampere is equal to 0.1 abamperes
Convert amperes to statamperes
1 ampere is equal to 299,792,454 statamperes
Other Units
Convert amperes to coulombs per second
1 ampere is equal to 1 coulomb per second
Related Calculators
Convert amperes to horsepower
1 amp at 120 volts with 90% efficiency is equal to .145 horsepower
Convert amperes to kilovolt-amperes
1 amp at 120 volts is equal to .12 kilovolt-amperes
Convert amperes to volt-amperes
1 amp at 120 volts is equal to 120 volt-amperes
Convert amperes to volts
1 amp at 10 watts is equal to 10 volts
Convert amperes to watts
1 amp at 120 volts is equal to 120 watts

Ampere Definition and Usage

The ampere, commonly referred to as just "amp," is the electrical current constant equal to the flow of one coulomb per second. According to an SI brochure, the ampere is a constant current that when passsed through two straight and parallel conductors that are spaced one meter apart, will produce a force equal to 0.0000002 newtons per meter of length.

The ampere is the SI base unit for electric current in the metric system. A ampere is sometimes also referred to as an amp. Amperes can be abbreviated as A, for example 1 ampere can be written as 1 A.

Ohm's Law states the current between two points on a conductor is proportional to the voltage and inversely proportional to the resistance. Using Ohm's Law, it's possible to express the current in amperes as an expression using resistance and voltage.

IA = VVR

The current in amperes is equal to the potential difference in volts divided by the resistance in ohms.

Background and Origin

The ampere is named for French physicist André-Marie Ampère to credit his work in electromagnetism and electrodynamics. The ampere was originally defined as one-tenth of an abampere, but has been redefined several times since.

Amperes Measurement Conversion Table

Common ampere values and equivalent imperial and metric electric current measurements
amperes milliamperes kiloamperes megaamperes biots abamperes statamperes coulombs per second
1 A 1,000 mA 0.001 kA 0.000001 MA 0.1 Bi 0.1 abA 299,792,454 statA 1 C/s
2 A 2,000 mA 0.002 kA 0.000002 MA 0.2 Bi 0.2 abA 599,584,907 statA 2 C/s
3 A 3,000 mA 0.003 kA 0.000003 MA 0.3 Bi 0.3 abA 899,377,361 statA 3 C/s
4 A 4,000 mA 0.004 kA 0.000004 MA 0.4 Bi 0.4 abA 1,199,169,815 statA 4 C/s
5 A 5,000 mA 0.005 kA 0.000005 MA 0.5 Bi 0.5 abA 1,498,962,268 statA 5 C/s
6 A 6,000 mA 0.006 kA 0.000006 MA 0.6 Bi 0.6 abA 1,798,754,722 statA 6 C/s
7 A 7,000 mA 0.007 kA 0.000007 MA 0.7 Bi 0.7 abA 2,098,547,176 statA 7 C/s
8 A 8,000 mA 0.008 kA 0.000008 MA 0.8 Bi 0.8 abA 2,398,339,629 statA 8 C/s
9 A 9,000 mA 0.009 kA 0.000009 MA 0.9 Bi 0.9 abA 2,698,132,083 statA 9 C/s
10 A 10,000 mA 0.01 kA 0.00001 MA 1 Bi 1 abA 2,997,924,537 statA 10 C/s
11 A 11,000 mA 0.011 kA 0.000011 MA 1.1 Bi 1.1 abA 3,297,716,991 statA 11 C/s
12 A 12,000 mA 0.012 kA 0.000012 MA 1.2 Bi 1.2 abA 3,597,509,444 statA 12 C/s
13 A 13,000 mA 0.013 kA 0.000013 MA 1.3 Bi 1.3 abA 3,897,301,898 statA 13 C/s
14 A 14,000 mA 0.014 kA 0.000014 MA 1.4 Bi 1.4 abA 4,197,094,352 statA 14 C/s
15 A 15,000 mA 0.015 kA 0.000015 MA 1.5 Bi 1.5 abA 4,496,886,805 statA 15 C/s
16 A 16,000 mA 0.016 kA 0.000016 MA 1.6 Bi 1.6 abA 4,796,679,259 statA 16 C/s
17 A 17,000 mA 0.017 kA 0.000017 MA 1.7 Bi 1.7 abA 5,096,471,713 statA 17 C/s
18 A 18,000 mA 0.018 kA 0.000018 MA 1.8 Bi 1.8 abA 5,396,264,166 statA 18 C/s
19 A 19,000 mA 0.019 kA 0.000019 MA 1.9 Bi 1.9 abA 5,696,056,620 statA 19 C/s
20 A 20,000 mA 0.02 kA 0.00002 MA 2 Bi 2 abA 5,995,849,074 statA 20 C/s

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