Capacitor code calculator

Type the code printed on a ceramic, film or tantalum capacitor. Tolerance letters (J, K, M) and voltage codes (like 2A = 100 V) are decoded too.

Code on the capacitor

Capacitance → code

CapacitanceUnit

How capacitor codes work

Small capacitors use the same idea as SMD resistors, in picofarads: two digits and a multiplier. 104 = 10 × 10⁴ pF = 100,000 pF = 100 nF = 0.1 µF. A third digit of 8 or 9 means ×0.01 or ×0.1 (109 = 1 pF). A one- or two-digit number is simply the value in pF: 22 = 22 pF. An R or n can mark the decimal point: 4n7 = 4.7 nF.

Common capacitor codes

Code	pF	nF	µF
101	100 pF	0.1 nF	0.0001 µF
102	1,000 pF	1 nF	0.001 µF
103	10,000 pF	10 nF	0.01 µF
104	100,000 pF	100 nF	0.1 µF
105	1,000,000 pF	1,000 nF	1 µF
106	10,000,000 pF	10,000 nF	10 µF
220	22 pF	0.022 nF	0.000022 µF
221	220 pF	0.22 nF	0.00022 µF
222	2,200 pF	2.2 nF	0.0022 µF
223	22,000 pF	22 nF	0.022 µF
224	220,000 pF	220 nF	0.22 µF
471	470 pF	0.47 nF	0.00047 µF
472	4,700 pF	4.7 nF	0.0047 µF
473	47,000 pF	47 nF	0.047 µF
474	470,000 pF	470 nF	0.47 µF

Tolerance letters

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

Voltage codes

Film and some ceramic capacitors print an EIA voltage code before the value — 2A104J is 100 V, 100 nF, ±5%. Electrolytic capacitors print the voltage in full.

Code	Rated voltage
`0G`	4 V
`0J`	6.3 V
`1A`	10 V
`1C`	16 V
`1E`	25 V
`1V`	35 V
`1H`	50 V
`1J`	63 V
`1K`	80 V
`2A`	100 V
`2C`	160 V
`2D`	200 V
`2E`	250 V
`2G`	400 V
`2W`	450 V
`2J`	630 V
`3A`	1000 V

All common codes have their own page in the capacitor code list.

Common values: code, reactance and RC tables

FAQ

What is a 104 capacitor?

A 104 capacitor is 100,000 pF = 100 nF = 0.1 µF, the standard decoupling capacitor.

What does the K mean on a capacitor?

K is the tolerance: ±10%. J is ±5% and M is ±20%. It does not mean kilo.

How do I convert nF to µF?

Divide by 1,000: 100 nF = 0.1 µF. Multiply nF by 1,000 for pF.