Last updated: March 2, 2026 by Dr. David Park

Resistor Color Code Calculator

Formula

Decode resistor color bands to find resistance and tolerance. Enter the digit values for each band and the multiplier to get the resistance in ohms with min/max tolerance range.

Common use cases:

  • Electronics prototyping
  • Circuit board repair
  • Electrical engineering education

Frequently Asked Questions

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Dr. David Park

Applied Mathematician, PhD Mathematics

David holds a PhD in Applied Mathematics from MIT. He has published research on numerical methods and computational algorithms used in engineering and scientific calculators.

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