Inductor color code
The inductance of an inductor can be calculated with the colors of the bands. Inductors can have four or five bands. Smaller inductors use numbers instead of colors, You can find more about these here.
Most inductors have four bands. The first two of these represent a two-digit significant number. The third band represents the multiplier. The inductance is calculated by multiplying the significant number by ten to the power of the value of the third band. The fourth band represents the tolerance. This is given as a percentage and indicates the error your inductor might have.
Five band inductors have an additional silver band at the beginning, which is a military identifier. Five band inductors work the same as their four band counterparts.
Color code table