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Capacitor Code Calculator - Online 3-Digit to Picofarad & Nanofarad

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Capacitor Code Calculator

Decode 3-digit capacitor codes to picofarads (pF) and nanofarads (nF) instantly.

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picofarads (pF)
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nanofarads (nF)
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microfarads (µF)
Reverse: Capacitance to Code

Find the standard 3-digit code for a given capacitance value (in pF).

pF
(closest standard code)
Assumes standard two‑digit significant figures (10–99). For values like 1 pF use code 010 (not standard but sometimes seen).
Common Capacitor Codes
CodepFnFµF
10010 pF0.01 nF0.00001 µF
101100 pF0.1 nF0.0001 µF
1021,000 pF1 nF0.001 µF
10310,000 pF10 nF0.01 µF
104100,000 pF100 nF0.1 µF
1051,000,000 pF1,000 nF1 µF
10610,000,000 pF10,000 nF10 µF
107100,000,000 pF100,000 nF100 µF
22022 pF0.022 nF0.000022 µF
221220 pF0.22 nF0.00022 µF
2222,200 pF2.2 nF0.0022 µF
22322,000 pF22 nF0.022 µF
224220,000 pF220 nF0.22 µF
474470,000 pF470 nF0.47 µF

Click any row to load the code.

Frequently Asked Questions

How do I read a 3-digit capacitor code?

The first two digits represent the significant figures, and the third digit is the multiplier (power of 10). The result is in picofarads (pF). For example, code 104 means 10 × 10⁴ = 100,000 pF = 100 nF.

What does the letter after the code mean (like 104K)?

The letter indicates the tolerance: J = ±5%, K = ±10%, M = ±20%. This tool ignores letters and only decodes the numeric part. You can still type "104K" and it will extract "104".

Why does a capacitor marked 100 equal 10 pF, not 100 pF?

With the 3-digit code, "100" means 10 × 10⁰ = 10 pF. To get 100 pF the code is 101 (10 × 10¹). Capacitor codes always express the value in picofarads using this multiplier system.

Can a code have letters in the middle, like 4R7?

Yes, that's a different notation (R indicates a decimal point). For example, 4R7 = 4.7 pF. This calculator currently works only with the 3-digit numeric code. We may add R-notation support in the future.

How accurate is the reverse calculation (capacitance to code)?

It finds the nearest standard code by rounding the significant digits to a two-figure integer (10–99) and adjusting the multiplier. Minor rounding may occur; it always displays the closest standard code.

What is the difference between pF, nF, and µF?

1 µF = 1,000 nF = 1,000,000 pF. Capacitors are often labeled in pF or nF depending on size. Our tool shows all three for convenience.

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