4 Band Resistor Color Code Calculator

Resistor Color Chart

Some resistors have the color bands grouped together  close to one end. Hold the resistor with the closely grouped bands to your left and read the resistor from the left to the right. Also, the first band can’t be silver or gold.

20% resistors do not have a tolerance ring. They will be calculated using the 4 band rule ,  you do not have to enter the 4th band.  If you select none 20% will be displayed.