Capacitor code calculator

Code to Value Converter

Please enter 2 or 3-digit code.

Value to Code Converter

Enter The Capacitance Value

µF nF pF

You may also try – Capacitor Unit Converter Calculator

Method of Finding the value/Meaning of codes of the capacitor

How to calculate capacitor value

•  Ceramic disc capacitors have two to three-digit codes printed on them.

•  The first two numbers describe the value of the capacitor, and the third number is the number of zeros in the multiplier.

•   When the first two numbers are multiplied by the multiplier, the resulting value is the capacitor’s value in picofarads.

•  If there is only two numbers,  it means there is no multiplier. Then you just read the value of the first two numbers in picofarads.

•  If any capacitor has 10 printed on it, then its value is 10 PF

104 capacitor code value

•  When any capacitor has 104 printed, it has a multiplier of 4 (the Third number of the code ) 10 is multiplied by 10×10⁴ =10000.  Then its value is 10×10000= 100000PF= 100nF=0.1uf

The last number is the power of 10 and is multiplied with the first two numbers.

If a capacitor has 682 code – first check the last no. Here the last no is 2. Now  the multiplier is 10²

For example—

• 204 = 20×10⁴ = 200000 PF
• 472 = 47×10² = 4700 PF
• 502 = 50×10² = 5000 PF
• 330 = 33×10⁰ = 33 PF   [10⁰ = 1]

UNITS—

• 1000 nanofarad(nF) = 1 microfarad(µF)
• 1 picofarad = 10^-12farads.
• Nano= 10^-9
• Micro= 10^-6
• 1 Nano Farad= 10^-9 Farad
• 1 Microfarad (µF)= 10^-6 Farad

1 nF = 1000 pF
1 pF = 0.001 nF

Example: 

convert 15 nF to pF:
15 nF = 15 × 1000 pF = 15000 pF

Codes of Polyester Film and Metallized Film Capacitor

If a capacitor is marked with 2A474J, the capacitance is decoded as described above, the two first signs is the voltage rating and can be decoded from the table given below here. 2A is a 100VDC rating according to the EIA (Electronic Industries Alliance) standard.

A second letter will be a temperature coefficient if it’s present.

Some capacitors are only marked as 0.1 or 0.01; in these cases, the values are mostly given in uF.

Some small capacitance capacitors can be marked with an R between numbers. If the code is 3R9, then R is an indicator of values Less than 10pF and has nothing to do with resistance. 3R9 would be 3.9pF

105J = 10×10⁵ = 1000000pf = 1000nf = 1.0uf

j = +/- 5% Tolerance

104 = 10×10⁴ = 100000pf = 100nf = 0.1uf

j = +-5% Tolerance

2A= 100VDC voltage rating

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