# Capacitor codes

There are multiple ways a capacitor can indicate its capacitance. Larger capacitors often have their capacitance, tolerance and maximum voltage written on the side. Smaller capacitors often use a code consisting of three numbers and sometimes one letter.

### Calculator

You can use this calculator to calculate the capacitance and tolerance of a capacitor.

### Calculation

The capacitance in picofarad (pF) is equal to the first two digits multiplied by ten to the power of the third digit: C = AB·10 ^{C }. Some capacitors contain the letter R, which represents the decimal point. The capacitance in pF is equal to all digits linked together with a decimal point on the location of the R in this case. The letter at the end indicates the tolerance. These values can be found in the table below.

letter | tolerance | letter | tolerance |
---|---|---|---|

A | 0.05pF | H | 3% |

B | 0.1pF | J | 5% |

C | 0.25pF | K | 10% |

D | 0.5pF | L | 15% |

E | 0.5% | M | 20% |

F | 1% | V | 25% |

G | 2% | N | 30% |

Z | +80% -20% | - | - |

#### Example

We have a capacitor with the code 156J. The capacitance is 15·10 ^{6 } pF = 15μF. The tolerance for J is 5%.