Capacitor Code Calculator
Use this component-code workflow to decode common three-digit capacitor markings. Confirm the full marking and component rating before use.
- Capacitance
- pF
- Capacitance
- nF
- Capacitance
- uF
- Tolerance
- %
- Preferred unit
Calculation details
- Calculation basis
- Component boundary
Recent results
Formulas
- Picofarads = first two digits x 10^third digit
- Nanofarads = picofarads / 1000
- Microfarads = picofarads / 1000000
- Tolerance is decoded from J, K, or M
Use this calculator
Convert a three-digit capacitor marking and tolerance code into pF, nF, uF, and tolerance.
Read the result
Review the calculated values with their displayed units and assumptions. The result is a planning aid for the stated inputs, not a final equipment or installation decision.
Check before final work
This capacitor code estimate decodes a common three-digit marking only. Verify the full component marking, voltage rating, polarity, dielectric, tolerance, temperature, manufacturer data, and safety requirements before use.
FAQs
What does 104 mean on a capacitor?
In the common three-digit convention, 104 means 10 followed by four zeros in picofarads: 100,000 pF, or 100 nF, or 0.1 uF.
Does the code show voltage rating?
No. The capacitance code does not replace the full marking or the voltage, polarity, temperature, and manufacturer data.