Electrical calculator + value chart
Resistor Color Code Calculator & Chart
Decode resistor color bands into resistance and tolerance, or enter an ohm value to find the nearest 4-band or 5-band color sequence.
Inputs
Results
Resistance
1 kΩ
Tolerance
±5%
Allowed range
950 Ω – 1.05 kΩ
Brown · Black · Red · Gold
Common resistor color code chart
Popular 4-band values shown with a ±5% gold tolerance band.
| Resistance | 4-band colour code |
|---|---|
| 220 Ω | Red · Red · Brown · Gold |
| 330 Ω | Orange · Orange · Brown · Gold |
| 470 Ω | Yellow · Violet · Brown · Gold |
| 1 kΩ | Brown · Black · Red · Gold |
| 2.2 kΩ | Red · Red · Red · Gold |
| 4.7 kΩ | Yellow · Violet · Red · Gold |
| 10 kΩ | Brown · Black · Orange · Gold |
| 47 kΩ | Yellow · Violet · Orange · Gold |
| 100 kΩ | Brown · Black · Yellow · Gold |
| 1 MΩ | Brown · Black · Green · Gold |
How resistor colour codes work
4-band resistor
Band 1 and Band 2 are significant digits, Band 3 is the multiplier and Band 4 is tolerance. Example: Brown–Black–Red–Gold = 10 × 100 = 1,000 Ω ±5%.
5-band resistor
The first three bands are significant digits, the fourth band is the multiplier and the fifth band is tolerance. This supports finer resistor values commonly used in precision circuits.
Resistor color code FAQ
What is the colour code for a 1k resistor?
A common 4-band 1 kΩ resistor is Brown, Black, Red, Gold, which represents 10 × 100 = 1,000 Ω with ±5% tolerance.
What is the colour code for a 10k resistor?
A common 4-band 10 kΩ resistor is Brown, Black, Orange, Gold, which represents 10 × 1,000 = 10,000 Ω with ±5% tolerance.
What is the colour code for a 220 ohm resistor?
A common 4-band 220 Ω resistor is Red, Red, Brown, Gold, which represents 22 × 10 = 220 Ω with ±5% tolerance.
What is the difference between 4-band and 5-band resistor codes?
A 4-band resistor uses two significant digits, a multiplier and tolerance. A 5-band resistor uses three significant digits, a multiplier and tolerance for finer value resolution.
What does a resistor color code chart show?
A resistor color code chart maps each band color to a digit, multiplier or tolerance. Use the chart for a quick lookup, or use the calculator above to decode 4-band and 5-band resistors automatically.