Capacitor Value / Code Calculator

Small ceramic and film capacitors are marked with a 3-digit code instead of a printed value — the Capacitor Value / Code Calculator decodes that marking into an actual capacitance reading, or converts a known value back into its printed code. To decode a code, enter the 3-digit capacitor code and select a tolerance code to get the capacitance value in pF, nF, and µF. To find a code, enter your capacitance value and unit (pF, nF, or µF) to get the corresponding 3-digit code.

Enter the 3-digit code printed on the capacitor

Results

Capacitance Value

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Capacitor Code

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Tolerance

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Value in nF

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Value in µF

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Frequently Asked Questions

How does the capacitor code calculator work?

Ceramic capacitors use a 3-digit code system where the first two digits represent the significant figures and the third digit is the multiplier (number of zeros). For example, 104 means 10 followed by 4 zeros = 100,000 pF = 100 nF.

What do the tolerance codes mean on capacitors?

Tolerance codes indicate the accuracy of the capacitor value. Common codes include: J (±5%), K (±10%), M (±20%), F (±1%), G (±2%). For small values under 10pF, C (±0.25pF) and D (±0.5pF) are used.

How do I convert between pF, nF, and µF?

The conversion is: 1 µF = 1,000 nF = 1,000,000 pF. To convert pF to nF, divide by 1,000. To convert nF to µF, divide by 1,000. Going the other way, multiply by 1,000 for each step up.

What if my capacitor code has letters or other markings?

This calculator works for standard 3-digit ceramic capacitor codes. Some capacitors may have additional letters indicating voltage rating or temperature coefficient. Focus on the 3-digit number for value calculation.

Why don't small capacitors show their full value?

Due to their tiny size, ceramic capacitors don't have enough space to print the full capacitance value. The 3-digit code system allows manufacturers to mark the value in a compact format while maintaining readability.

What's the difference between ceramic and other capacitor types?

This calculator is specifically for ceramic capacitors with 3-digit codes. Electrolytic capacitors typically have their values printed directly, while film capacitors may use different marking systems or color codes.

How accurate are ceramic capacitors?

Ceramic capacitor accuracy depends on the tolerance code. Standard tolerances range from ±1% for precision applications to ±20% for general purpose use. The tolerance code letter indicates the expected variation from the nominal value.