Ceramic capacitors: how to read 3-digit plus 1-letter markings?
The numbers work like a resistor.

The first two numbers are just numbers.

The third number is the number of 0's after.  It's in picofarads.

So:


103 is 1 0 000 or 10,000pf or 10nF
104 is 1 0 0000 or 100,000pf or 100nF


The letter next is the tolerance:

B   +/- 0.10pF
C   +/- 0.25pF
D   +/- 0.5pF
E   +/- 0.5%
F   +/- 1%
G   +/- 2%
H   +/- 3%
J   +/- 5%
K   +/- 10%
M   +/- 20%
N   +/- 30%
P   +100% ,-0%
Z   +80%, -20% 


Anything after that is usually manufacturer specific.