The Resistor Color Code Calculator decodes 4- and 5-band resistors into a resistance value with tolerance, and encodes a value back into band colors. Minimum and maximum values within tolerance are shown alongside the nominal figure.
Resistor Color Code Calculator / Decoder
Decode 4, 5 and 6 band resistor color codes into resistance, tolerance and temperature coefficient, with the min/max range and the nearest E12 and E24 standard values.
Band configuration
Digit bands
Tolerance and drift
Results
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resistance
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tolerance
Notes
About Resistor Color Code Calculator / Decoder
Features
- Decode and encode modes
- 4-band and 5-band resistors
- Digit, multiplier and tolerance bands
- Nominal, minimum and maximum values
- Full standard color set
How to Use
- Choose decode or encode and the band count.
- Select the band colors, or enter a value to encode.
- Read the resistance, tolerance and min/max range.
Examples
Example: red, violet and a brown multiplier -> 270.00 ohms, with a plus/minus 1% range of 267.30 to 272.70 ohms.
Benefits
- The tolerance range shows what the part may actually measure
- Encode mode helps when picking a value from stock
Frequently Asked Questions
What does this calculator do?
Decode 4, 5 and 6 band resistor color codes into resistance, tolerance and temperature coefficient, with the min/max range and the nearest E12 and E24 standard values.
Is my data stored?
No. Everything runs in your browser; nothing is uploaded, saved or logged.