221 capacitor value

The code 221 reads as 22 × 10¹ pF: 220 pF, which is the same as 0.22 nF or 0.00022 µF.

The value in each unit

220pF

0.22nF

0.00022µF

Open 221 in the capacitor code calculator →

With a tolerance letter

Marking	Tolerance	Minimum	Maximum
`221J`	±5%	0.000209 µF	0.000231 µF
`221K`	±10%	0.000198 µF	0.000242 µF
`221M`	±20%	0.000176 µF	0.000264 µF

Other ways it's marked

On schematics and parts lists, the same capacitor appears as 220p, 0.22 nF or 0.00022 µF.

Where it's used

Values below 1 nF are typical in radio circuits, oscillators and high-frequency filters, usually as C0G (NP0) ceramic capacitors, which stay stable with temperature.

Nearby codes

← 151 = 150 pF 331 = 330 pF →

Capacitor code chart →

Frequently asked questions

What is the value of a 221 capacitor?

220 pF, the same as 0.22 nF or 0.00022 µF.

Is 221 the same as 220p?

Yes. 221 is the 3-digit code and 220p is the letter code for the same 220 pF.

What does the letter after 221 mean?

It's the tolerance: 221J is ±5%, 221K is ±10% and 221M is ±20%.

Does the code 221 show the voltage?

No. The voltage is printed separately (such as 50V, or a code like 2A, which means 100 V) or only given in the datasheet. Replace it with a capacitor rated for the same voltage or higher.