Resistor colour code
Decode or encode 4, 5 and supported 6-band resistor markings.
Development preview. Check the assumptions below before relying on a result. Calculations run in your browser.
How it calculates
Model: Value = significant digits × multiplier
Assumptions
- Read from the significant-digit end. Six-band TCR mapping is the cited Vishay convention; special reliability bands are not decoded.
Worked example
These are the calculator's default inputs. Change any input above to recalculate.
Inputs
- Direction
- decode
- Bands in reading order
- yellow violet red gold
- Bands for encoding
- 4
- Value to encode
- 4700 Ω
- Tolerance to encode
- 5 %
- TCR magnitude to encode
- 100 ppm
- Nearest preferred series
- E24
Results
- Resistance
- 4700 Ω
- Tolerance
- 5 %
- TCR magnitude
- Not encoded ppm/°C
- Colour bands
- yellow · violet · red · gold
- Nearest preferred value
- 4700 Ω
- Encoding error
- 0 %