The resistor color code indicates the value of resistance and the tolerance of a resistor. This app calculate values after selection the colors of the bands on a resistor.The calculator above will display the value. Resistance is measured in ohms(?). Min. and max. range values also can be see. If you start inputting from the wrong end, you can reverse the order easily by press the "reverse order" button.It may be useful for students of electricity/electronics and radio geeks. Resistor Color Code Reader.