A milliampere (mA) equals one-thousandth of an ampere and is the everyday scale for small electronics and batteries.
Milliamperes to Amperes
Convert Milliampere (mA) to Ampere (A) instantly with an exact formula, conversion table, and FAQ.
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Convert milliamperes (mA) to amperes (A) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The ampere (A) is the SI unit of electric current, measuring the rate of flow of electric charge.
A = mA × 0.001
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Formula
A = mA × 0.001
mA = A × 1000
Conversion table
| 1 mA | 0.001 A |
| 5 mA | 0.005 A |
| 10 mA | 0.01 A |
| 20 mA | 0.02 A |
| 50 mA | 0.05 A |
| 100 mA | 0.1 A |
| 500 mA | 0.5 A |
| 1000 mA | 1 A |
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How the formula works
Both milliampere and ampere measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in milliamperes by 0.001 to get amperes. To reverse the conversion, multiply a ampere value by 1000 to get back to milliamperes.
Frequently asked questions
What is Milliampere (mA)?
A milliampere (mA) equals one-thousandth of an ampere and is the everyday scale for small electronics and batteries.
What is Ampere (A)?
The ampere (A) is the SI unit of electric current, measuring the rate of flow of electric charge.
How do I convert milliamperes to amperes?
Multiply the milliampere value by 0.001 to get the equivalent in amperes. For example, 5 mA × 0.001 = 0.005 A.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.001 is an exact, non-rounded value.
Can I convert amperes back to milliamperes?
Yes. Divide the ampere value by 0.001, or multiply it by 1000, to get milliamperes.
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About converting milliamperes to amperes
A milliampere (mA) equals one-thousandth of an ampere and is the everyday scale for small electronics and batteries. The ampere (A) is the SI unit of electric current, measuring the rate of flow of electric charge.
Use this calculator to move between milliamperes and amperes accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.