Current converter
A, mA, µA, nA.
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
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.).
Multiply by the factor written as a fraction
Put mA in the denominator so it cancels, leaving A.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 0.001 A
1 mA in other units
Batch convert mA → A
- 1 mA = 0.001 A
- 5 mA = 0.005 A
- 10 mA = 0.01 A
- 25 mA = 0.025 A
Common current conversions
Current units and exact definitions
| Unit | System | Definition |
|---|---|---|
| Ampere (A) | SI (metric) | Base unit |
| Milliampere (mA) | SI (metric) | 1 mA = 0.001 A |
| Microampere (µA) | SI (metric) | 1 µA = 0.000001 A |
| Nanoampere (nA) | SI (metric) | 1 nA = 1e-9 A |
| Kiloampere (kA) | SI (metric) | 1 kA = 1000 A |
Milliamperes to amperes conversion table
| Milliamperes (mA) | Amperes (A) |
|---|---|
| 0.1 mA | 0.0001 A |
| 0.5 mA | 0.0005 A |
| 1 mA | 0.001 A |
| 2 mA | 0.002 A |
| 3 mA | 0.003 A |
| 4 mA | 0.004 A |
| 5 mA | 0.005 A |
| 6 mA | 0.006 A |
| 7 mA | 0.007 A |
| 8 mA | 0.008 A |
| 9 mA | 0.009 A |
| 10 mA | 0.01 A |
| 15 mA | 0.015 A |
| 20 mA | 0.02 A |
| 25 mA | 0.025 A |
| 30 mA | 0.03 A |
| 40 mA | 0.04 A |
| 50 mA | 0.05 A |
| 75 mA | 0.075 A |
| 100 mA | 0.1 A |
| 250 mA | 0.25 A |
| 500 mA | 0.5 A |
| 1,000 mA | 1 A |
Frequently asked questions
Which current units can I convert?
amperes (A), milliamperes (mA), microamperes (µA), nanoamperes (nA), kiloamperes (kA).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.