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Table of Capacitance Conversions and ValuesBy Mike Morris WA6ILQ |

__Background:__

It's easy for others, but every time I try to convert capacitance values I always end up off by at least one factor of ten ! My high school electronics instructor, Mr. Andreano, wrote the first three columns on the chalkboard one day in 1965, and I copied it into my notebook. I added column 4 while I worked at NASA/JPL. Just print it, cut it out and post it over your workbench. End of problem !

microFarads | nanoFarads | picoFarads | 3-digit Markings | Other Markings |
---|---|---|---|---|

0.000,001 µF | 0.001 nF | 1 pF | Sometimes labeled with a centered "P", as in 3P3=3.3pF | |

0.000,01 µF | 0.01 nF | 10 pF | 100 | |

0.000,1 µF | 0.1 nF | 100 pF | 101 | |

0.001 µF | 1 nF | 1,000 pF | 102 | As above, a centered "N" indicates nanoFarads, as in 3N3=3.3nF=.0033µF=3300pF |

0.01 µF | 10 nF | 10,000 pF | 103 | |

0.1 µF | 100 nF | 100,000 pF | 104 | |

1 µF | 1,000 nF | 1,000,000 pF | 105 | As above, a centered "U" indicates microFarads, as in "1U0"=1.0µF. Just insert a decimal point for the "U" and call it µF. Likewise 2U2=2.2 µF. |

10 µF | 10,000 nF | 10,000,000 pF | 106 | |

100 µF | 100,000 nF | 100,000,000 pF | ||

1,000 µF | 1,000,000 nF | 1,000,000,000 pF |

This is all based on the fact that 1 µF=1x10^{-6} Farads, 1 nF=1x10^{-9}
Farads and 1 pF=1x10^{-12} Farads.

Sometimes you will see parts labeled in a format similar to "3U3 63V". Those are most likely 3.3 microFarad 63 Volt DC capacitors. As above, just insert a decimal point for the "U" and call it microFarads.

The same situation applies to some resistor designations. 3K3 would be 3.3 K Ohms, 2M2 would be 2.2 megohms, 1R0 would be 1.0 Ohms.

__Contact Information:__

The author can be contacted at: his-callsign // at // repeater-builder // dot // com.

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This page originally posted on Tuesday 26-Dec-2007

Article text, and hand-coded HTML © Copyright 2009 by Michael Morris WA6ILQ.

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.