One milliamp is exactly 1,000,000 nanoamps, so converting milliamps to nanoamps is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
The milliamp is the unit almost every consumer specification uses: phone chargers, LEDs and fuses are all rated in mA. One nano ampere is one billionth of a ampere (1e-9 amperes).
Below the calculator there is a step table for the values people look up most, and a second table putting real how much charge flows past a point each second figures into nanoamps so the number you get has something to be compared against.
The formula
milliamps- The amount you are converting, in milliamps
1,000,000- The exact number of nanoamps in one milliamp
nanoamps- The converted result
How it works, step by step
- Enter the value in milliamps.
- It is multiplied by 1,000,000, the exact factor between the two units.
- The answer is shown in nanoamps, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Domestic ring-main fuse (UK): 3.2e+04 mA in nanoamps
Take domestic ring-main fuse (uk), roughly 3.2e+04 mA. The conversion is a single multiplication — 3.2e+04 × 1e+06 — giving 3.2e+10 nA. Because the relationship is proportional, doubling the input doubles the answer to 6.4e+10 nA.
LED indicator: 20 mA in nanoamps
Take led indicator, roughly 20 mA. The conversion is a single multiplication — 20 × 1e+06 — giving 2e+07 nA. Because the relationship is proportional, doubling the input doubles the answer to 4e+07 nA.
How to read your score
Frequently asked questions
How many nanoamps are in one milliamp?
Exactly 1,000,000. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert milliamps to nanoamps?
nanoamps = milliamps × 1,000,000. Reversed, milliamps = nanoamps ÷ 1,000,000, which is the same as multiplying by 1e-06.
Which is the bigger unit, the milliamp or the nanoamp?
The milliamp. One milliamp equals 1e+06 nanoamps.
What does this quantity actually measure?
Both units measure how much charge flows past a point each second. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a milliamp?
The milliamp is the unit almost every consumer specification uses: phone chargers, LEDs and fuses are all rated in mA.
What is a nanoamp?
One nano ampere is one billionth of a ampere (1e-9 amperes).
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Milliamps to nanoamps reference tables
| Milliamps | Nanoamps |
|---|---|
| 0.5 mA | 500,000 nA |
| 1 mA | 1e+06 nA |
| 2 mA | 2e+06 nA |
| 3 mA | 3e+06 nA |
| 5 mA | 5e+06 nA |
| 10 mA | 1e+07 nA |
| 20 mA | 2e+07 nA |
| 25 mA | 2.5e+07 nA |
| 50 mA | 5e+07 nA |
| 75 mA | 7.5e+07 nA |
| 100 mA | 1e+08 nA |
| 250 mA | 2.5e+08 nA |
| 500 mA | 5e+08 nA |
| 1000 mA | 1e+09 nA |
| 5000 mA | 5e+09 nA |
Exact factor: 1 milliamp = 1,000,000 nanoamps.
| Quantity | mA | nA |
|---|---|---|
| LED indicator | 20 mA | 2e+07 nA |
| Phone fast charger | 3000 mA | 3e+09 nA |
| Domestic ring-main fuse (UK) | 3.2e+04 mA | 3.2e+10 nA |
| Car starter motor | 3e+05 mA | 3e+11 nA |
| MIG welder at full output | 2.5e+05 mA | 2.5e+11 nA |
| Microcontroller sleep mode | 0.005 mA | 5000 nA |
Published reference values, converted with the same factor this page uses.