Resistor Colour Code Calculator
This calculator converts resistor values to or from 5-band or 4-band colour codes. Details of the colour code system can be found
in the technical data section.
To convert from value to colours:
Select the resistor type (4 or 5 bands) using the radio buttons. Type the resistance in the box below and select the
units and (optionally) the tolerance
from the drop-down boxes. The colour bands will be displayed below on the image of the resistor.
To convert from colours to value:
Select the resistor type (4 or 5 bands) using the radio buttons. Hover the mouse over the coloured bands on the image of the resistor to
display the colour selector box, then click on the required
colour. Repeat for all bands (tolerance is optional). The resistance will be shown in the box above the image, along with the units
Preferred resistor values:
Converting a value either way will display the nearest preferred resistor value below the image of the resistor. Use the radio buttons
below the image to select the series of preferred values to use (E12 - E192).
If you found this calulator useful you should try Electronics Assistant!
- All the online calculators and more in a stand-alone application
- Converts Resistor & Inductor colour codes, calculates LED series resistors, capacitance
units, series / parallel resistors & capacitors, frequency, reactance & more
- Calculation of nearest preferred resistor values with a choice of 5 series from E12 to E192
- Print & save calculation results