Capacitor code calculator
Capacitance from a three digit code and tolerance letter, in pF, nF and µF, with the minimum and maximum value.
Code 104K
100nF
10 × 10^4 pF, ±10%- Picofarads
- 100,000 pF
- Nanofarads
- 100 nF
- Microfarads
- 0.1 µF
- Tolerance range
- 90 nF to 110 nF
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% |
Method
How this is calculated
C = first two digits × 10^third digit in pF Third digit 9 → × 0.1 (1.0 to 9.9 pF, e.g. 229 = 2.2 pF) Third digit 8 → × 0.01 (0.5 to 0.99 pF, e.g. 508 = 0.5 pF) 104 = 10 × 10⁴ pF = 100 nF One or two digits → the value in pF (47 = 47 pF)
- Tolerance letters
- 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%. B, C and D are absolute and used on small values.
- Not covered
- Voltage and dielectric codes, and two character letter and digit codes.
Sources
- KEMET, Surface Mount Multilayer Ceramic Chip Capacitors, C0G Dielectric, C1003_C0G (ordering information: capacitance code and tolerance)2/20/2025
- KEMET, Surface Mount Multilayer Ceramic Chip Capacitors, Y5V Dielectric, C1005_Y5V_SMD (ordering information: Z = +80% / −20%)2/20/2025
- IEC 60062, Marking codes for resistors and capacitorsEdition 6.1, 2019-08-20 (edition 6.0:2016 consolidated with Amendment 1:2019)
FAQ
Questions
10 followed by four zeros in picofarads: 100,000 pF, which is 100 nF or 0.1 µF.
10,000 pF, so 10 nF or 0.01 µF. 102 is 1 nF and 105 is 1 µF.
Tolerance. 104K is 100 nF ±10%, so 90 to 110 nF. J is ±5%, M ±20%, and Z is +80% / −20%.
With 9 as the third digit for × 0.1 and 8 for × 0.01. 229 is 2.2 pF and 508 is 0.5 pF. These small values usually carry an absolute tolerance such as C, ±0.25 pF.
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