Question 1

How do I read a 3-digit capacitor code?

Accepted Answer

The first two digits are the value in picofarads and the third digit is the multiplier (power of 10). For example, 104 = 10 x 10^4 pF = 100,000 pF = 100 nF = 0.1 µF.

Question 2

What does the letter after the code mean?

Accepted Answer

The letter is the tolerance code. Common codes: F = ±1%, G = ±2%, J = ±5%, K = ±10%, M = ±20%, Z = +80/-20%. The tool shows the tolerance automatically when you enter a code with a letter suffix.

Question 3

How do I convert between pF, nF and µF?

Accepted Answer

1000 pF = 1 nF and 1000 nF = 1 µF. The calculator shows the value in all three units simultaneously so you never have to convert by hand.

Question 4

Are capacitor values stored anywhere?

Accepted Answer

No. Every calculation runs in your browser. No values are sent to any server.