Resistor Color Code Calculator
Decode 4, 5, or 6-band resistors including tolerance and temperature coefficient.
Decoded value
Formula and method
Valor = dígitos × multiplicador ± tolerancia
Important assumptions
Read from the end where bands are grouped more closely; the tolerance band is usually separated.
Frequently asked questions
Does the calculation run locally?
Yes. Values are processed in your browser and are not sent to a server.
Can I use it for a real installation?
Use it as an educational reference and verify components, tolerances, safety, and applicable code with technical documentation or a qualified person.
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