SI Units

Notes

• The yellow highlights are commonly used in Electronics and Computing.
• The others are more exotic and/or extreme!
• Note the lower case k for Kilo.
• Using an upper case K is a common but unimportant mistake because it
  does not lead to ambiguity.

Examples

When plugging values into formulas ...

• always use whole Volts, Amps, Farads, Watts, Hertz etc.

Commonly Needed Conversions

47 pF = 47 x 10^-12 F

10 nF = 10 x 10^-9 F

100 µF = 100 x 10^-6 F

22 kΩ = 22 x 10³ Ω

1.5 MΩ = 1.5 x 10⁶ Ω

35 mW = 35 x 10^-3 W

32 kHz = 32 x 10³ Hz

Common Mistakes

• Don't write MV when you mean mV.
• The first is megavolts and the second is millivolts.
• Only a 1000000000 times error!
• If you have 1000 Ohms, that is one kilohm and not one killer-ohm.
• Also say one megohm and not one mega-ohm