Math & Science
Motståndets färgkodskalkylator
Decode resistor values from color bands
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Frequently asked questions
How do I read the bands?
Start from the band closest to one end. That's band 1.
What does each band mean?
4-band: digit, digit, multiplier, tolerance. 5-band adds third digit.
What is the gold/silver band?
Typically tolerance: Gold = ±5%, Silver = ±10%.
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About this tool
This Resistor Color Code Calculator turns your inputs into practical results. Provide Resistance Value, Number of Bands, and Band Colors to calculate Resistance and Tolerance.
Adjust values to compare scenarios and see how sensitive the result is. The calculation uses the numbers as entered, so double-check units and expect small differences from rounding in the displayed totals.