What this tool does
Convert between electric current units: ampere, milliampere, microampere, kiloampere, abampere and more. Type an amount in amperes, choose the units, and the tool converts it to milliamperes. It offers 10 electric current units and also shows the same amount in the others.
Inputs
- Value: A number.
- From: Choose one from 10 options, including Megaampere, Kiloampere, Ampere, Milliampere, Microampere, Nanoampere. Starts as Ampere.
- To: Choose one of the same 10 units as "From". Starts as Milliampere.
How to use
- Enter the amount you want to convert.
- Choose the unit to convert from and the unit to convert to.
- Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.
Worked examples
Conversions from amperes to milliamperes:
- 1 A = 1,000 mA
- 5 A = 5,000 mA
- 10 A = 10,000 mA
- 50 A = 50,000 mA
- 100 A = 100,000 mA
Multiply the number of amperes by 1,000 to get milliamperes. Both units are exact definitions, so 1,000 is the exact factor: 1 A = 1,000 mA.
Sources: Ampere: SI Brochure, 9th edition (2019). Milliampere: SI Brochure, 9th edition (2019, updated 2022), Table 7 (SI prefixes).
Limitations
- Converts the unit of an electric current only. It does not work out current from power, voltage or resistance.
- Abampere and statampere are historical CGS units, listed for completeness.
FAQs
- Q: What is the SI unit of electric current?
- A: The ampere (A). It is one of the seven SI base units. The other units here are prefixed amperes or historical CGS units.
- Q: How many milliamperes are in an ampere?
- A: One ampere is 1000 milliamperes.
- Q: What are abamperes and statamperes?
- A: They are the electromagnetic and electrostatic CGS units of current. One abampere is exactly 10 amperes. One statampere is about 3.3356 × 10⁻¹⁰ amperes.
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