- Ampere definition
- Amperemeter
- Table of ampere unit prefixes
- How to convert amps to microamps (μA)
- How to convert amps to milliamps (mA)
- How to convert amps to kiloamps (kA)
- How to convert amps to watts
- How to convert amps to volts
- How to convert amps to ohms
- How to convert amps to kilowatts
- How to convert amps to kva
- How to convert amps to coulombs

Ampere or amp (symbol: A) is the unit of electrical current.

The Ampere unit is named after Andre-Marie Ampere, from France.

One Ampere is defined as the current that flows with electric charge of one Coulomb per second.

1 A = 1 C/s

Ampere meter or ammeter is an electrical instrument that is used to measure electrical current in amperes.

When we want to measure the electrical current on the load, the ampere-meter is connected in series to the load.

The resistance of the ampere-meter is near zero, so it will not affect the measured circuit.

name | symbol | conversion | example |
---|---|---|---|

microampere (microamps) | μA | 1μA = 10^{-6}A |
I_{ }= 50μA |

milliampere (milliamps) | mA | 1mA = 10^{-3}A |
I_{ }= 3mA |

ampere (amps) | A |
- |
I_{ }= 10A |

kiloampere (kiloamps) | kA | 1kA = 10^{3}A |
I_{ }= 2kA |

The current I in microamperes (μA) is equal to the current I in amperes (A) divided by 1000000:

*I*_{(μA)} = *I*_{(A)} / 1000000

The current I in milliamperes (mA) is equal to the current I in amperes (A) divided by 1000:

*I*_{(mA)} = *I*_{(A)} / 1000

The current I in kiloamperes (mA) is equal to the current I in amperes (A) times 1000:

*I*_{(kA)} = *I*_{(A)} ⋅ 1000

The power P in watts (W) is equal to the current I in amps (A) times the voltage V in volts (V):

*P*_{(W)} = *I*_{(A)} ⋅ *V*_{(V)}

The voltage V in volts (V) is equal to the power P in watts (W) divided by the current I in amperes (A):

*V*_{(V)} = *P*_{(W)} / *I*_{(A)}

The voltage V in volts (V) is equal to the current I in amperes (A) times the resistance R in ohms (Ω):

*V*_{(V)} = *I*_{(A)} ⋅ *R*_{(Ω)}

The resistance R in ohms (Ω) is equal to the voltage V in volts (V) divided by the current I in amperes (A):

*R*_{(Ω)} = *V*_{(V)}* / I*_{(A)}

The power P in kilowatts (kW) is equal to the current I in amps (A) times the voltage V in volts (V) divided by 1000:

*P*_{(kW)} = *I*_{(A)} ⋅
*V*_{(V)} / 1000

The apparent power S in kilovolt-amps (kVA) is equal to RMS current I_{RMS}
in amps (A), times the RMS voltage V_{RMS} in volts (V), divided by 1000:

*S*_{(kVA)} = *I*_{RMS(A)} ⋅
*V*_{RMS}_{(V)}* */ 1000

The electric charge Q in coulombs (C) is equal to the current I in amps (A), times the time of current flow t in seconds (s):

*Q*_{(C)} = *I*_{(A)} ⋅ *t*_{(s)}

- Ampere (A)
- dB-milliwatt (dBm)
- dB-watt (dBW)
- Decibel (dB)
- Farad (F)
- Kilovolt-amp (kVA)
- Kilowatt (kW)
- Kilowatt-hour (kWh)
- Ohm (Ω)
- Volt (V)
- Watt (W)