How to use the resistor colour code calculator
- Count the bands and choose 3, 4, 5 or 6.
- Pick each colour from the first band; the value, tolerance range and temperature coefficient update immediately.
- Or type a value below to see the bands it should carry.
Resistor colour code chart (IEC 60062)
Read from the end farthest from the gold or silver band. A 4-band resistor has two digits, a multiplier and a tolerance; a 5-band has three digits; a 6-band adds a temperature coefficient.
| Color | Digit | Multiplier | Error | Temp. coefficient |
|---|---|---|---|---|
| Black | 0 | × 1 | — | 250 ppm/K |
| Brown | 1 | × 10 | ± 1% | 100 ppm/K |
| Red | 2 | × 100 | ± 2% | 50 ppm/K |
| Orange | 3 | × 1kΩ | ± 0.05% | 15 ppm/K |
| Yellow | 4 | × 10kΩ | ± 0.02% | 25 ppm/K |
| Green | 5 | × 100kΩ | ± 0.5% | 20 ppm/K |
| Blue | 6 | × 1MΩ | ± 0.25% | 10 ppm/K |
| Violet | 7 | × 10MΩ | ± 0.1% | 5 ppm/K |
| Grey | 8 | × 100MΩ | ± 0.01% | 1 ppm/K |
| White | 9 | × 1GΩ | — | — |
| Gold | — | × 100mΩ | ± 5% | — |
| Silver | — | × 10mΩ | ± 10% | — |
| None | — | — | ± 20% | — |
| Value | 4-band (± 5%) | 5-band (± 1%) |
|---|---|---|
| 10 Ω | Brown Black Black Gold | Brown Black Black Gold Brown |
| 47 Ω | Yellow Violet Black Gold | Yellow Violet Black Gold Brown |
| 100 Ω | Brown Black Brown Gold | Brown Black Black Black Brown |
| 220 Ω | Red Red Brown Gold | Red Red Black Black Brown |
| 330 Ω | Orange Orange Brown Gold | Orange Orange Black Black Brown |
| 470 Ω | Yellow Violet Brown Gold | Yellow Violet Black Black Brown |
| 1 kΩ | Brown Black Red Gold | Brown Black Black Brown Brown |
| 2.2 kΩ | Red Red Red Gold | Red Red Black Brown Brown |
| 4.7 kΩ | Yellow Violet Red Gold | Yellow Violet Black Brown Brown |
| 10 kΩ | Brown Black Orange Gold | Brown Black Black Red Brown |
| 22 kΩ | Red Red Orange Gold | Red Red Black Red Brown |
| 47 kΩ | Yellow Violet Orange Gold | Yellow Violet Black Red Brown |
| 100 kΩ | Brown Black Yellow Gold | Brown Black Black Orange Brown |
| 1 MΩ | Brown Black Green Gold | Brown Black Black Yellow Brown |
Four-band resistors usually carry a gold ± 5% band; five-band precision resistors usually brown ± 1%.
Frequently asked questions
Which end of a resistor do you read from?
Gold and silver only appear as multiplier or tolerance bands, so start from the end away from them. The tolerance band is usually set apart by a wider gap. If neither end is gold or silver, the first band is usually closer to its lead.
What is the difference between 4-band and 5-band resistors?
A 4-band resistor has two significant digits, typically a ± 5% carbon film part; a 5-band resistor has three, typically a ± 1% metal film part. Six bands add a temperature coefficient.
What is brown black black red brown?
Five bands: 1, 0, 0 × 100 = 10,000 Ω, i.e. 10 kΩ ± 1%. The 4-band brown black orange gold is also 10 kΩ, at ± 5%.
Are my inputs uploaded?
No. Everything is calculated locally in your browser and nothing is stored; a share link only carries the values you entered.
Results are for design estimates and part selection; for production and safety-related circuits follow component datasheets, applicable standards and measurements.