Resistor Color Code & Ohm’s Law

4/5-band resistor decoder with visual bands plus V=IR power solver.

Bands:

Digit 1

Digit 2

Multiplier

Tolerance

Resistance1 kΩ ±5%

Range (± tol.)950 Ω … 1.05 kΩ

175 available

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About this calculator

Decode 4/5-band resistor color codes with a visual body, tolerance range in Ω/kΩ/MΩ — plus an Ohm’s law solver for V, I, R and P.

How to read the bands?

First bands are digits, next is the multiplier (number of zeros), last is tolerance; gold means ×0.1 and ±5%.

4 or 5 bands?

4-band uses two digits, 5-band uses three for tighter precision; select the count to match your part.

What is Ohm’s law?

V = I × R and P = V × I: give any two of voltage, current, resistance to get the rest.