IAN LANG ELECTRONICS

Capacitor Code Crib Sheet

Small capacitor markings are as follows:

uF nF pF Small Marking
0.000001 0.001 1 1
0.00001 0.01 10 10
0.0001 0.1 100 101
0.001 1 1000 102
0.01 10 10,000 103
0.1 100 100,000 104
1 1000 1,000,000 105
10 10,000 10,000,000, -
100 100,000 100,000,000 -

Xc = 1/(2   fC)

C is expressed in Farads, f in Hertz and Xc in ohms

For a 10 microfarad capacitor at 1000 Hertz reactance is 15.92 ohms and at 500 Hz 31.85
A 0.1 microfarad capacitor at 1000Hz = 1592.36 ohms and 3184.71 ohms.

10 microfarad at 60 Hz is 265.4 ohms, 1 microfarad is 2653.9 ohms and 0.1 is 26539 ohms.
 

As frequency goes up reactance goes down, and the smaller the capacitor the more reactance for a given frequency.