Calculate resistor value by selecting the band colors.Or Reverse: Enter a resistor value and find the color code.If the value is not an standard E-series value the two nearest values are shown.* 3, 4, 5 and 6 band resistor support *If the resistor has a standard E-series value then also the E-series number will be shown.If something is wrong please contact me by email before rating this app.It is not possible for me to test it on every device available.Send me the details of your device and then i will correct it.This app is designed for mobile phones.It’s also working on tablets but the layout will not be optimal.