Math & Science

Resistor Colour Code

Read 4, 5 and 6-band resistor colour codes, or find the bands for a value. Free, no sign-up, and it runs in your browser — your files are never uploaded.

How to use

  1. Pick 4, 5 or 6 bands
  2. Choose each band’s colour
  3. Read the resistance and tolerance — or type a value to get its colours

Questions

Do I need an account?

No. Every tool is free to use without signing up.

Is my data uploaded?

No. This tool runs in your browser, so the text and files you use stay on your device.

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