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Table of Capacitance Conversions and Values
By Mike Morris WA6ILQ
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.
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.