Science
Resistor Color Code Calculator
Decode a 4-band resistor from band 1, band 2, multiplier, and tolerance colors.
Inputs
Resistor Color Code Calculator
Result
Resistance
1 kΩ ±5%
- Minimum
- 950 Ω
- Maximum
- 1.05 kΩ
How it's calculated
R = (digit₁ × 10 + digit₂) × 10^multiplier
Common questions
Which end do I read first?
Hold the resistor with the tolerance band (usually gold or silver) on the right. Then read the remaining bands left-to-right.
What if my resistor has 5 bands?
A 5-band resistor uses three significant digits instead of two, followed by a multiplier and tolerance. This calculator handles the more common 4-band code.
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