SpecCalc

SpecCalc Hub

Resistor Color Code Calculator

Decode common 4-band resistor color codes.

Status
live
Type
Calculation
Risk
Low risk
Group
Electronics and pinouts

Interactive block

Resistance1 kΩ
Tolerance±5%

Client-side estimate. No input is stored by SpecCalc Hub.

Reference formula

This simplified formula block is educational and depends on the page status and limitations.

R = (10 x first_digit + second_digit) x multiplier
R
resistance
multiplier
color-band multiplier

Graphics

Resistor color code diagramdigits x multiplier +/- tolerance
Simplified educational resistor color-band diagram.

This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.