Resistor Color Code
Click the bands to read a resistor, or type a value to get its colours. SMD codes too.
Examples:
About this tool
Reading the bands
Hold the resistor so the tolerance band (often gold or brown, set slightly apart) is on the right. Read the digit bands from the left, then multiply by the multiplier band. A 4-band resistor has two digits; 5 and 6-band precision resistors have three. The sixth band is the temperature coefficient in ppm per kelvin. Colours follow IEC 60062.
SMD codes
3 digits (5% parts): two digits then the number of zeros, so 472 = 4,700 ฮฉ. 4 digits (1%): three digits then zeros, so 4701 = 4,700 ฮฉ. R marks the decimal point: 4R7 = 4.7 ฮฉ, R010 = 0.01 ฮฉ. EIA-96 (1%, tiny parts): a two-digit index into the E96 table plus a letter multiplier, so 01C = 100 ร 100 = 10 kฮฉ. A part marked 0 or 000 is a zero-ohm jumper.
Standard values
Resistors are sold in E-series steps: E12 (10%), E24 (5%) and E96 (1%). If your value isn't in any series, re-check the band order or colours: red and orange, and brown and red, are easy to confuse under warm light.