# Amperes to Milliamperes Conversion

Enter the electric current in amperes below to get the value converted to milliamperes.

**Results in Milliamperes:**

## How to Convert Amperes to Milliamperes

To convert an ampere measurement to a milliampere measurement, multiply the electric current by the conversion ratio.

Since one ampere is equal to 1,000 milliamperes, you can use this simple formula to convert:

The electric current in milliamperes is equal to the amperes multiplied by 1,000.

**For example,**here's how to convert 5 amperes to milliamperes using the formula above.

### How Many Milliamperes are in an Ampere?

There are **1,000** milliamperes in an ampere, which is why we use this value in the formula above.

1 A = 1,000 mA

Amperes and milliamperes are both units used to measure electric current. Keep reading to learn more about each unit of measure.

## Amperes

The ampere, commonly referred to as an "amp," is the electrical current constant equal to the flow of one coulomb per second.

The ampere was previously defined as a constant current that when passed 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.

In 2019, the ampere was redefined as the electric current corresponding to the flow of 1/(1.602 176 634 × 10^{-19}) elementary charges per second.^{[1]}

The ampere is the SI base unit for electric current in the metric system. An 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.

I_{A} = V_{V}R_{Ω}

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

## Milliamperes

One milliampere is equal to 1/1,000 of an ampere, which is the electrical current equal to the flow of one coulomb per second.

The milliampere is a multiple of the ampere, which is the SI base unit for electric current. In the metric system, "milli" is the prefix for 10^{-3}. A milliampere is sometimes also referred to as a milliamp. Milliamperes can be abbreviated as *mA*; for example, 1 milliampere can be written as 1 mA.

## Ampere to Milliampere Conversion Table

Amperes | Milliamperes |
---|---|

0.001 A | 1 mA |

0.002 A | 2 mA |

0.003 A | 3 mA |

0.004 A | 4 mA |

0.005 A | 5 mA |

0.006 A | 6 mA |

0.007 A | 7 mA |

0.008 A | 8 mA |

0.009 A | 9 mA |

0.01 A | 10 mA |

0.02 A | 20 mA |

0.03 A | 30 mA |

0.04 A | 40 mA |

0.05 A | 50 mA |

0.06 A | 60 mA |

0.07 A | 70 mA |

0.08 A | 80 mA |

0.09 A | 90 mA |

0.1 A | 100 mA |

0.2 A | 200 mA |

0.3 A | 300 mA |

0.4 A | 400 mA |

0.5 A | 500 mA |

0.6 A | 600 mA |

0.7 A | 700 mA |

0.8 A | 800 mA |

0.9 A | 900 mA |

1 A | 1,000 mA |

## References

- 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