ZovaTool

Resistor Calculator

Resistance
1 kΩ
±5%

How to use the Resistor Calculator

  1. Pick 4-band or 5-band.
  2. Select each color from the dropdowns.
  3. Read resistance in Ω, kΩ or MΩ with tolerance.
  4. Use the Series/Parallel block for combinations of multiple resistors.
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Reading resistor color bands

4-band: digit, digit, multiplier, tolerance. 5-band: digit, digit, digit, multiplier, tolerance.

Series: R_total = R1 + R2 + … Parallel: 1/R = 1/R1 + 1/R2 + …

Memory aid: Big Boys Race Our Young Girls But Violet Generally Wins.