Capacitor code calculator

Ceramic and film capacitor markings to pF, nF and µF, and a value back to its code. Results update as you type.

Indicative calculation; verify before use.

Code to value

Marking on the capacitor

Examples: 104, 473K, 4R7, 47, 2A104J, 1H222K, 105K 250V, 4n7.

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Picofarad: –
Nanofarad: –
Microfarad: –
Tolerance: –
Voltage: –

Value to code

Capacitance

Unit

Code

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Below 10 pF the code uses R as the decimal point (4R7 = 4.7 pF). The three-digit code holds two significant digits, so values are rounded.

Common codes

Tap a code to decode it above.

pF	nF	µF
1 pF	0.001 nF	0.000001 µF
2.2 pF	0.0022 nF	0.0000022 µF
4.7 pF	0.0047 nF	0.0000047 µF
10 pF	0.01 nF	0.00001 µF
22 pF	0.022 nF	0.000022 µF
47 pF	0.047 nF	0.000047 µF
100 pF	0.1 nF	0.0001 µF
220 pF	0.22 nF	0.00022 µF
470 pF	0.47 nF	0.00047 µF
1000 pF	1 nF	0.001 µF
2200 pF	2.2 nF	0.0022 µF
4700 pF	4.7 nF	0.0047 µF
10000 pF	10 nF	0.01 µF
22000 pF	22 nF	0.022 µF
47000 pF	47 nF	0.047 µF
100000 pF	100 nF	0.1 µF
220000 pF	220 nF	0.22 µF
470000 pF	470 nF	0.47 µF
1000000 pF	1000 nF	1 µF
10000000 pF	10000 nF	10 µF

How it works

Code XYZ → C = XY × 10^Z pF Z = 8 → × 0.01, Z = 9 → × 0.1 4R7 → 4.7 pF (R marks the decimal point) 1 nF = 1000 pF, 1 µF = 1000 nF

The first two digits are the significant figures and the third is the number of zeros, in picofarads: 104 is 10 followed by four zeros = 100 000 pF = 100 nF. One- and two-digit markings (47) are plain picofarads. Some parts use a unit letter as the decimal point instead (4n7 = 4.7 nF, 1u0 = 1 µF).

A letter after the code is the tolerance: F ±1 %, G ±2 %, J ±5 %, K ±10 %, M ±20 %, Z +80 % / −20 %. For values below 10 pF, B, C, D, F and G mean ±0.1, ±0.25, ±0.5, ±1 and ±2 pF. A digit and a letter before the code is the voltage rating, for example 1H = 50 V and 2A = 100 V. Supported voltage codes: 0G 4 V, 0J 6.3 V, 1A 10 V, 1C 16 V, 1E 25 V, 1H 50 V, 1J 63 V, 2A 100 V, 2D 200 V, 2E 250 V, 2F 315 V, 2G 400 V. Many parts write the voltage out (100V) instead.

A third digit of 9 or 8 is read as × 0.1 or × 0.01 (109 = 1 pF, 108 = 0.1 pF). Some manufacturers use this; we could not confirm it in the sources below, so treat such readings with extra care.

Markings are not fully standardised across manufacturers. Check the datasheet when a part matters, and measure unknown parts.

Sources (checked 2026-10-31):

Three-digit code XY × 10^Z pF, J/K/M tolerance letters, μ as decimal marker: https://en.wikipedia.org/wiki/Ceramic_capacitor
Tolerance letters, with B/C/D/F/G in pF below 10 pF (IEC 60062, as tabulated): https://en.wikipedia.org/wiki/Ceramic_capacitor
Unit letter as decimal point (4n7 = 4.7 nF, RKM code): https://en.wikipedia.org/wiki/Capacitor
EIA voltage codes (digit + letter), R as decimal point (0R5, 2R2), tolerance letters J/K/M/Z: https://www.electronics-notes.com/articles/electronic_components/capacitors/capacitor-codes-markings.php