Why do some people use mF for microFarad and others use uF for Capacitance Units?
The Greek letter mu (like a u but with a tail starting the letter) is the correct symbol for micro. Mu isnt available on many keyboards so m is often used instead., as millifarads (m is used for milli in the SI system) are not generally used in electronics (although it is a scientific unit). Others use the keyboard letter u for the Greek letter mu as it looks similar and can`t be confused with any other notation. In older circuits youll often see mmf which is not m for milli either but means million millionths of a farad, or pF picofarads as we know them now. The units are, 1 Farad (F) = 1000 milli Farad (mF – not generally used) = 1000 000 micro Farad (uF) = 1000 000 000 nano Farad (nF) = 1000 000 000 000 pico Farad (pF – old mmF) Some capacitor values may be marked in alternative ways such as a number followed by K being used to show thousands of pF (= number of nF). Most formulae use the full Farad, so convert the value for calculations. The units relate by thousands/thousandths so
