Resistor color code
Calculate, convert and check circuit values in your browser.
Inputs
Results
- Resistance
- 1,000 Ω
- Tolerance
- 5 %
- Minimum
- 950 Ω
- Maximum
- 1,050 Ω
Questions, examples and engineering limits
Decode 4-, 5- and 6-band resistor colors into resistance, tolerance and temperature coefficient. Learn reading direction and why color does not give power rating.
Content updated:
How is Resistor Color Code Calculator: 4, 5 and 6 Bands calculated?
Use R = significant digits × 10^multiplier. Decode 4-, 5- and 6-band resistor colors into resistance, tolerance and temperature coefficient. Learn reading direction and why color does not give power rating.
Sources: digikey.com [1]
How do I calculate this example: brown-black-red-gold?
1000 Ω ±5%; 950…1050 Ω. This is a calculated example under the model stated above; it is not a measured component specification.
Which units does Resistor Color Code Calculator: 4, 5 and 6 Bands use?
Ω, %, ppm/K. Convert prefixes before substituting values; keep the input and output units attached to every number.
Sources: digikey.com [1]
How are four and five bands different?
Four bands use two significant digits; five bands use three. Both then add multiplier and tolerance.
Sources: digikey.com [1]
What is the sixth band for?
In the supported six-band convention it gives temperature coefficient in ppm/K, not another resistance digit.
Sources: digikey.com [1]
Can I identify a damaged resistor by color alone?
No. Heat can change colors; some inductors also use bands. Verify the circuit, package, measurement and manufacturer data.
Sources: digikey.com [1]
Answers use the stated model and units. Examples are calculated values, not measurements or component ratings.