Capacitor code calculator
Find what the 104, 473J or 4n7 on a ceramic or film capacitor is in pF, nF and µF, or see the code of a value.
From a code to a value
100 nF
- pF
- 100000 pF
- nF
- 100 nF
- µF
- 0.1 µF
From a value to a code
Common codes
| Code | pF | nF | µF |
|---|---|---|---|
| 100 | 10 pF | 0.01 nF | 0.00001 µF |
| 220 | 22 pF | 0.022 nF | 0.000022 µF |
| 101 | 100 pF | 0.1 nF | 0.0001 µF |
| 102 | 1000 pF | 1 nF | 0.001 µF |
| 222 | 2200 pF | 2.2 nF | 0.0022 µF |
| 103 | 10000 pF | 10 nF | 0.01 µF |
| 223 | 22000 pF | 22 nF | 0.022 µF |
| 473 | 47000 pF | 47 nF | 0.047 µF |
| 104 | 100000 pF | 100 nF | 0.1 µF |
| 224 | 220000 pF | 220 nF | 0.22 µF |
| 474 | 470000 pF | 470 nF | 0.47 µF |
| 105 | 1000000 pF | 1000 nF | 1 µF |
How to read it
The code is in picofarads (pF). The first two digits are the value and the third is how many zeros follow: 104 = 10 and four zeros = 100,000 pF = 100 nF = 0.1 µF. One or two digits are picofarads as they are: 22 = 22 pF. A third digit of 9 means ×0.1 and 8 means ×0.01: 479 = 4.7 pF. In codes like 4n7 the letter is both the unit and the decimal point: 4n7 = 4.7 nF. A letter after the code is the tolerance (J = ±5%, K = ±10%). A separate code like 2A or 1H is not the value but the voltage it withstands. The 100 nF marked 104 is the capacitor Arduino projects most often put next to a chip's supply pin to filter out noise.
Tolerance letters
| Letter | Tolerance |
|---|---|
| B | ±0.1 pF |
| C | ±0.25 pF |
| D | ±0.5 pF |
| F | ±1% |
| G | ±2% |
| J | ±5% |
| K | ±10% |
| M | ±20% |
| Z | +80% / −20% |
In the app, tick off every wire, match the parts to your inventory and pick up where you left off.
