Resistor colour codes

Resistors should be read from left to right when you holding the resistor with the grouping of the rings to the left. If it is a 5% or 10% resistor, the gold and silver ring must be to the right, as they can never be the first ring.

Resistors with 3 bands are a 20% tolerance resistors and should be decoded as a 4 band resistor.

Resistors with 6 bands are special resistors with a temperature coefficient used in equipment where resistors able of withstanding a certain temperature is critical.

On SMD and other small resistors, the value can be given in a numerical way, like “103F”. These numbers should be decoded in the table as a 4 band resistors.

In order to write Ohm values easily in schematics, R is used for sub 1000 Ohm values, as 0R1 = 0,1 Ohm. K is kilo and is used for thousands as in 4K7 = 4700 Ohm. M is mega and is used for millions as in 10M = 10000000 Ohm.

Colour 1st band 2nd band 3rd band Multiplier Tolerance
Black 0 0 0 1 Ω
Brown 1 1 1 10 Ω 1% (F)
Red 2 2 2 100 Ω 2% (G)
Orange 3 3 3 1 KΩ
Yellow 4 4 4 10 KΩ
Green 5 5 5 100 KΩ 0,5% (D)
Blue 6 6 6 1 MΩ 0,25% (C)
Violet 7 7 7 10 MΩ 0,1% (B)
Grey 8 8 8 0,05%
White 9 9 9
Gold 0,1 Ω 5% (J)
Silver 0,01 Ω 10% (K)

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