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Milliamperes to Amperes

1 milliampere = 0.001 amperes · 1 A = 1,000 mA

1 milliampere = 0.001 amperes

How it’s calculated

A = mA × 0.001

  • Multiply the value in milliamperes by 0.001.
  • To go back, divide by 0.001 (or multiply by 1000).
  • 1 mA = 0.001 A · 1 A = 1,000 mA
Show worked solutionFactor, unit cancellation and rounding, step by step

  1. Find the conversion factor

    By definition 1 A = 1000 mA. Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units); BIPM SI Brochure (9th ed.).

  2. Multiply by the factor written as a fraction

    Put mA in the denominator so it cancels, leaving A.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 0.001 A

1 mA in other units

Batch convert mA → A
Results
  1. 1 mA = 0.001 A
  2. 5 mA = 0.005 A
  3. 10 mA = 0.01 A
  4. 25 mA = 0.025 A

Permanent link to this conversion

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Quick examples

  • 1 milliampere = 0.001 amperes
  • 5 milliamperes = 0.005 amperes
  • 10 milliamperes = 0.01 amperes
  • 25 milliamperes = 0.025 amperes
  • 100 milliamperes = 0.1 amperes

About these units

Milliampere (mA)

SI (metric)

1 mA = 0.001 A

Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)

Ampere (A)

SI (metric)

SI base unit of electric current, defined by fixing the elementary charge.

Base unit

Source: BIPM SI Brochure (9th ed.)

Milliamperes to amperes conversion table

milliampere (mA) to ampere (A)
Milliamperes (mA)Amperes (A)
0.1 mA0.0001 A
0.5 mA0.0005 A
1 mA0.001 A
2 mA0.002 A
3 mA0.003 A
4 mA0.004 A
5 mA0.005 A
6 mA0.006 A
7 mA0.007 A
8 mA0.008 A
9 mA0.009 A
10 mA0.01 A
15 mA0.015 A
20 mA0.02 A
25 mA0.025 A
30 mA0.03 A
40 mA0.04 A
50 mA0.05 A
75 mA0.075 A
100 mA0.1 A
250 mA0.25 A
500 mA0.5 A
1,000 mA1 A

Related conversions

Frequently asked questions

How do I convert milliamperes to amperes?

Use A = mA × 0.001. Multiply the value in milliamperes by 0.001.

How many amperes are in 1 milliampere?

1 milliampere (mA) equals 0.001 amperes (A).

How many milliamperes are in 1 ampere?

1 ampere (A) equals 1,000 milliamperes (mA).

What is 10 mA in A?

10 milliamperes = 0.01 amperes.

What is a ampere?

SI base unit of electric current, defined by fixing the elementary charge.

Formula: A = mA × 0.001. Factors last reviewed 2026-10-27.