- 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 definition

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

### Amperemeter

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.

### Table of ampere unit prefixes

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 |

### How to convert amps to microamps (μA)

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

*I*_{(μA)} = *I*_{(A)} / 1000000

### How to convert amps to milliamps (mA)

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

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

### How to convert amps to kiloamps (kA)

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

*I*_{(kA)} = *I*_{(A)} ⋅ 1000

### How to convert amps to watts (W)

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)}

### How to convert amps to volts (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)}

### How to convert amps to ohms (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)}

### How to convert amps to kilowatts (kW)

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

### How to convert amps to kilovolt-ampere (kVA)

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

### How to convert amps to coulombs (C)

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)}

Currently, we have around 1977 calculators, conversion tables and usefull online tools and software features for students, teaching and teachers, designers and simply for everyone.

You can find at this page financial calculators, mortgage calculators, calculators for loans, calculators for auto loan and lease calculators, interest calculators, payment calculators, retirement calculators, amortization calculators, investment calculators, inflation calculators, finance calculators, income tax calculators, compound interest calculators, salary calculator, interest rate calculator, sales tax calculator, fitness & health calculators, bmi calculator, calorie calculators, body fat calculator, bmr calculator, ideal weight calculator, pace calculator, pregnancy calculator, pregnancy conception calculator, due date calculator, math calculators, scientific calculator, fraction calculator, percentage calculators, random number generator, triangle calculator, standard deviation calculator, other calculators, age calculator, date calculator, time calculator, hours calculator, gpa calculator, grade calculator, concrete calculator, subnet calculator, password generator conversion calculator and many other tools and for text editing and formating, downloading videos from Facebok (we built one of the most famous Facebook video downloader online tools). We also provide you online downloanders for YouTube, Linkedin, Instagram, Twitter, Snapchat, TikTok and other social media sites (please note we does not host any videos on its servers. All videos that you download are downloaded from Facebook's, YouTube's, Linkedin's, Instagram's, Twitter's, Snapchat's, TikTok's CDNs. We also specialise on keyboard shortcuts, ALT codes for Mac, Windows and Linux and other usefull hints and tools (how to write emoji online etc.)

There are many very usefull online free tools and we would be happy if you share our page to others or send us any suggestions for other tools which will come on your mind. Also in case you find any of our tools that it does not work properly or need a better translation - please let us know. Our tools will make your life easier or simply help you to do your work or duties faster and in more effective way.

These below are the most commonly used by many users all over the world.

- Free online calculators and tools
- Time zones/Clocks/Dates calculators
- Free online units conversion tools
- Free online web design tools
- Free online electricity & electronics tools
- Mathematics
- Online Tools
- Text Tools
- PDF Tools
- Code
- Ecology
- Others
- Basic Electrical Terms
- Electrical & Electronic Units
- Electronic Components
- Electrical & Electronic Symbols
- Electronic Circuit Laws
- Ampere (A)
- Decibel (dB)
- Decibel-milliwatt (dBm)
- Decibel-Watt (dBW)
- Farad (F)
- Joule (J) unit
- Kilovolt-amp (kVA)
- Kilowatt (kW)
- Kilowatt-hour (kWh)
- Lumen (lm) unit
- Lux unit definition
- Ohm (Ω)
- Volt (V)
- Watt (W)

And we are still developing more. Our goal is to become the one-stop, go-to site for people who need to make quick calculations or who need to find quick answer for basic conversions.

Additionally, we believe the internet should be a source of free information. Therefore, all of our tools and services are completely free, with no registration required. We coded and developed each calculator individually and put each one through strict, comprehensive testing. However, please inform us if you notice even the slightest error – your input is extremely valuable to us. While most calculators on Justfreetools.com are designed to be universally applicable for worldwide usage, some are for specific countries only.