How do I read resistor colour bands?

Read from the end where the bands are grouped: the first bands are digits, the next is the multiplier, and the last is the tolerance.

Which way round do I read a resistor?

Put the tolerance band (often gold or silver, and slightly spaced apart) on the right, then read the digit bands from the left.

As a tolerance band, gold means ±5%. As a multiplier band it means ×0.1.

免費電阻色碼，輸入值直接在您的裝置上計算。

Number of bands

Choose the number of bands (4, 5 or 6).
Select the colour of each band from left to right.
Read the resistance, tolerance and (for 6 bands) temperature coefficient instantly.

Resistors use colored bands to mark their value. Reading from the end with the bands grouped closest together:

Color	Digit	Multiplier	Tolerance
Black	0	×1	—
Brown	1	×10	±1%
Red	2	×100	±2%
Orange	3	×1k	—
Yellow	4	×10k	—
Green	5	×100k	±0.5%
Blue	6	×1M	±0.25%
Violet	7	×10M	±0.1%
Grey	8	×100M	±0.05%
White	9	×1G	—
Gold	—	×0.1	±5%
Silver	—	×0.01	±10%

How do I read resistor colour bands?: Read from the end where the bands are grouped: the first bands are digits, the next is the multiplier, and the last is the tolerance.
Which way round do I read a resistor?: Put the tolerance band (often gold or silver, and slightly spaced apart) on the right, then read the digit bands from the left.
What does a gold band mean?: As a tolerance band, gold means ±5%. As a multiplier band it means ×0.1.