ENGINEERING / FREE ONLINE TOOL
Resistor Color Code Calculator
Read the resistance and tolerance of a four-band resistor.
Free to use On-device processing No account needed
Your workspace Runs privately in your browser
Your result
A little guidance.
Decode a four-band resistor: two significant digits, a multiplier, and tolerance. Read from the end nearest the first band; the spaced tolerance band is last. This calculator does not cover five-band, six-band, or surface-mount markings.
How it works
- Enter your values, or use the example to get started.
- Select “Calculate” to process your input in your browser.
- Review the result, then copy or download it when available.
Good to know.
Is my input sent to a server?
No. This tool runs in your browser. KILIZU does not upload or store the values or files you enter here.