Resistor Calculator
Decode resistor color bands to find resistance value and tolerance. Also calculate series and parallel resistor combinations.
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Calculator insights
What this calculator does
Resistor Calculator helps you quickly estimate decode resistor color bands to find resistance value and tolerance. also calculate series and parallel resistor combinations. with clean output and clear next steps.
How the calculation works
Enter Mode, Band 1, Band 2 and this calculator uses standard formulas to determine Resistance. The output is displayed immediately in a user-friendly format.
Example calculation
For example, enter realistic values into the Resistor Calculator to see how the calculator produces Resistance that you can use for planning and comparison.
Disclaimer
The calculations provided by this website are for informational purposes only and should not be considered financial, legal, tax, or professional advice.
Frequently Asked Questions
How do I read resistor color codes?
For 4-band resistors: First two bands = digits, third = multiplier, fourth = tolerance. Brown-Black-Red-Gold = 10 × 100 = 1,000Ω ±5%.