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Resistor Calculator

Resistor: Ideal resistor values.

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Resistor Calculator for United States

US · 12,345.67US customary measurementsRoad distance: miles

United States display and unit preferences. The stated calculation method is used. Review the labeled units before entering your values.

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Your details

Results update instantly as you change the inputs.

Nominal resistance (Ω)

1,000

United States · calculated from your inputs

Minimum within tolerance (Ω)950
Maximum within tolerance (Ω)1,050
Your calculation, beautifully packaged.Download a report with this result, your inputs, the formula, and assumptions.

How this result was calculated

  1. Color-code resistance=significant digits×10^multiplier; series adds resistances; parallel uses 1/Σ(1/R).
  2. Country setup: United States. Displayed measurements are converted to the formula's base units internally.

Assumption: Ideal resistor values. Six-band temperature coefficient is entered numerically; real components have tolerance and thermal/power limits. United States display and unit preferences. The stated calculation method is used. Review the labeled units before entering your values.

Calculation version 1.0.0 · Support state: generic

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Formula and method

Color-code resistance=significant digits×10^multiplier; series adds resistances; parallel uses 1/Σ(1/R).

This calculation uses the values you enter. It runs in your browser and does not request a location or account.

Worked example

Brown, black, red, gold indicates 1000 Ω ±5%.

Questions people ask

Which method does this tool use?

Color-code resistance=significant digits×10^multiplier; series adds resistances; parallel uses 1/Σ(1/R).

What should I check before using the result?

Ideal resistor values. Six-band temperature coefficient is entered numerically; real components have tolerance and thermal/power limits.