Electrical & Electronics

Resistor Color Code Calculator

Decode 4, 5 and 6-band resistors, including tolerance and temperature coefficient.

CALCULATOR

Enter values

Reverse lookup

Resistance

UnitTolerance

USAGE

How to use it

Choose the number of bands.
Select a color for each band; the value and drawing update instantly.
Use reverse lookup to turn a resistance and tolerance into a common color code.

FORMULA

Calculation

4-band: AB × multiplier; 5/6-band: ABC × multiplier

Example

Brown – Black – Red – Gold = 1 kΩ ±5%

TECHNICAL

Technical notes

Gold and silver cannot be used as significant digits.
The E12/E24 comparison reports the nearest preferred value.