How to use resistor colour decoder
Decode four- or five-band resistor values and tolerance. This browser tool shows the inputs, assumptions and resulting output so you can use it for a specific everyday task.
- Enter your own values or choose a supported file.
- Adjust the options and run the tool.
- Review the result, then copy, export or save it when available.
Try this next
Decode brown, black, red and gold as a four-band resistor.
Read band direction and verify parts with a meter when needed. The decoder does not identify damaged or nonstandard components from a photo.
Questions, answered.
Is resistor colour decoder free to use?
Yes. This tool is part of Nepocore’s free browser toolkit. There is no paid tier, file-download gate or application account required.
What should I check before using the result?
Read band direction and verify parts with a meter when needed. The decoder does not identify damaged or nonstandard components from a photo.
Does this tool upload my files or text?
The tool processes its input in your browser. File contents and text are not sent to a processing server. See the privacy page for local storage and hosting details.