Visualize your resistor
Use the colour pickers below to match the bands on your component and read the calculated value instantly.
Band configuration:
Band 1Band 2Band 3MultiplierTolerance
Select band colours
Band 1
First significant digit
Band 2
Second significant digit
Band 3
Third significant digit
Multiplier
Multiplier (10ⁿ factor)
Tolerance
Tolerance (%)
How the colour code is calculated
- Identify the tolerance band first; it is usually spaced further from the lead.
- Read bands toward the other end. The first two (or three) bands are the significant digits.
- Convert the multiplier band into a power of ten (e.g. red = 10², gold = 10⁻¹) and multiply the digits.
- Apply the tolerance percentage to find the minimum and maximum possible values.
- If present, use the temperature coefficient to estimate drift: ΔR = R · tempco · ΔT.
Source: IEC 60062 / EIA RS-279 — Colour coding for fixed resistors. Values shown assume base-10 series.
Reference table
| Colour | Digit | Multiplier | Tolerance | Tempco (ppm/°C) |
|---|---|---|---|---|
Black | 0 | 10⁰ | — | 250 |
Brown | 1 | 10¹ | ±1% | 100 |
Red | 2 | 10² | ±2% | 50 |
Orange | 3 | 10³ | — | 15 |
Yellow | 4 | 10⁴ | — | 25 |
Green | 5 | 10⁵ | ±0.5% | — |
Blue | 6 | 10⁶ | ±0.25% | 10 |
Violet | 7 | 10⁷ | ±0.1% | 5 |
Grey | 8 | 10⁸ | ±0.05% | — |
White | 9 | 10⁹ | — | 1 |
Gold | — | 10⁻¹ | ±5% | — |
Silver | — | 10⁻² | ±10% | — |
No band | — | — | ±20% | — |