What does 104 mean on a capacitor?

10 followed by 4 zeros in picofarads: 100,000 pF = 100 nF = 0.1 µF.

What does the K mean, like in 104K?

The trailing letter is the tolerance — K means ±10% (J is ±5%, M is ±20%).

The R is a decimal point, so 4R7 = 4.7 pF.

커패시터 코드

커패시터 코드을(를) 위한 무료 온라인 도구입니다. 입력값은 기기 안에서 계산됩니다.

Capacitor code

How to use this calculator

Type the code printed on the ceramic capacitor (e.g. 104, 223, 4R7 or 104K).
The value in pF, nF and µF appears instantly, with the tolerance letter if present.

How capacitor codes work

Small ceramic capacitors are marked with a 3-character code. The first two digits are the significant figures and the third is the number of zeros (the power-of-ten multiplier), giving a value in picofarads (pF):

104 → 10 × 10⁴ pF = 100,000 pF = 100 nF = 0.1 µF

A letter R stands for a decimal point (so 4R7 = 4.7 pF). One- and two-digit codes are read directly in pF. A trailing letter indicates the tolerance.

Letter	Tolerance	Letter	Tolerance
B	±0.1 pF	J	±5%
C	±0.25 pF	K	±10%
D	±0.5 pF	M	±20%
F	±1%	Z	+80% / −20%
G	±2%

Common codes

Code	Capacitance
102	1 nF
103	10 nF
104	100 nF (0.1 µF)
105	1 µF
223	22 nF
473	47 nF

자주 묻는 질문

What does 104 mean on a capacitor?: 10 followed by 4 zeros in picofarads: 100,000 pF = 100 nF = 0.1 µF.
What does the K mean, like in 104K?: The trailing letter is the tolerance — K means ±10% (J is ±5%, M is ±20%).
How do I read 4R7?: The R is a decimal point, so 4R7 = 4.7 pF.

커패시터 코드

How to use this calculator

How capacitor codes work

Common codes

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