To convert microfarads to millifarads, multiply by 0.001. That factor is the whole relationship: both units measure how much charge a component stores per volt, so the conversion is a proportion with no offset and no substance-specific constant.
Microfarads cover electrolytics, motor-run capacitors and audio coupling — the values most repair jobs deal with. One milli farad is one thousandth of a farad (1e-3 farads).
Capacitor labelling. The same part may be printed 100 nF, 0.1 uF, or the three-digit code 104, and all three mean the same component. Nanofarads are the awkward middle: European schematics favour nF, American ones favour uF. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into millifarads, which is usually more useful than the bare number.
The formula
microfarads- The amount you are converting, in microfarads
0.001- The exact number of millifarads in one microfarad
millifarads- The converted result
How it works, step by step
- Enter the value in microfarads.
- It is multiplied by 0.001, the exact factor between the two units.
- The answer is shown in millifarads, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Decoupling capacitor: 0.1 µF in millifarads
Decoupling capacitor comes to about 0.1 µF. Multiplying by the factor: 0.1 × 0.001 = 0.0001 mF. Dividing the answer back by 0.001 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
Motor-run capacitor: 25 µF in millifarads
At 25 µF (motor-run capacitor), the same quantity in millifarads is 25 × 0.001 = 0.025 mF. One microfarad is 0.001 millifarads, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many millifarads are in one microfarad?
Exactly 0.001. 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 microfarads to millifarads?
millifarads = microfarads × 0.001. Reversed, microfarads = millifarads ÷ 0.001, which is the same as multiplying by 1000.
Which is the bigger unit, the microfarad or the millifarad?
The millifarad. One microfarad is only 0.001 of a millifarad, so it takes 1000 microfarads to make one millifarad.
What does this quantity actually measure?
Both units measure how much charge a component stores per volt. 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 microfarad?
Microfarads cover electrolytics, motor-run capacitors and audio coupling — the values most repair jobs deal with.
What is a millifarad?
One milli farad is one thousandth of a farad (1e-3 farads).
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.
Microfarads to millifarads reference tables
| Microfarads | Millifarads |
|---|---|
| 0.5 µF | 0.0005 mF |
| 1 µF | 0.001 mF |
| 2 µF | 0.002 mF |
| 3 µF | 0.003 mF |
| 5 µF | 0.005 mF |
| 10 µF | 0.01 mF |
| 20 µF | 0.02 mF |
| 25 µF | 0.025 mF |
| 50 µF | 0.05 mF |
| 75 µF | 0.075 mF |
| 100 µF | 0.1 mF |
| 250 µF | 0.25 mF |
| 500 µF | 0.5 mF |
| 1000 µF | 1 mF |
| 5000 µF | 5 mF |
Exact factor: 1 microfarad = 0.001 millifarads.
| Quantity | µF | mF |
|---|---|---|
| Crystal load capacitor | 2.2e-05 µF | 2.2e-08 mF |
| Decoupling capacitor | 0.1 µF | 0.0001 mF |
| Audio coupling capacitor | 1 µF | 0.001 mF |
| Motor-run capacitor | 25 µF | 0.025 mF |
| Power supply smoothing capacitor | 4700 µF | 4.7 mF |
| Supercapacitor cell | 1e+06 µF | 1000 mF |
Published reference values, converted with the same factor this page uses.