Capacitor Code Calculator
Decode a 3-digit capacitor code into picofarads, nanofarads and microfarads.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Capacitor Code Calculator
How to use this tool
- Enter the 3-digit code printed on the capacitor.
- Press Generate to see the value in pF, nF and microfarads.
- Use Load sample for code 104, or Clear to start again.
Worked example
For code 104, the first two digits give 10 and the third digit adds 4 zeros: 10 followed by 0000 is 100,000 pF, which is 100 nF or 0.1 microfarads.
What this tool does not do / Limits
This decodes standard 3-digit ceramic capacitor codes only. It does not cover letter tolerance codes, voltage ratings, or codes printed on electrolytic capacitors, which use a different marking style.
Frequently asked questions
What does the third digit mean?
It is the number of zeros to add after the first two digits. In 104, the 4 adds four zeros to 10, giving 100,000 pF.
Why are there three units?
Picofarads, nanofarads and microfarads are the same value at different scales: 1,000 pF is 1 nF, and 1,000 nF is 1 microfarad.
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