ruchira
// ENGINEERING TOOL

Resistor colour code calculator

Decode 4, 5 and 6-band resistor colour codes, or find the bands for any value, snapped to the nearest E12, E24 or E96 standard value.

  • Free
  • No sign-up
  • Private: runs in your browser
// HOW IT WORKS

4 steps, no sign-up.

Built and maintained by Ruchira Sachinthana. Spotted a bug or want a feature? Tell me.

  1. 01Choose 4, 5 or 6 bands.
  2. 02Pick the colour of each band, or type a resistance to get the colours.
  3. 03Read the value, tolerance and range.
  4. 04Use the nearest standard value if your value isn't in the series.
// FAQ

Resistor colour code: questions, answered.

Something else? Ask on WhatsApp.

Start from the band closest to a lead. The tolerance band, often gold or silver, is usually set apart on the other end.

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// CUSTOM TOOLS

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