Is the Resistor Color Code Calculator free to use?

Yes. Every tool on the site is completely free, with no account, login or download required.

Most tools process content on your device. Features using live data, external services or sharing make network requests. Review the tool's instructions and our Privacy Policy before using sensitive information.

Does it work on mobile?

The layout adapts to phones, tablets and desktops. Available file formats, device access and larger processing jobs depend on your browser and device.

Do I need to install anything?

No installation is needed to use the website. The optional browser extension and mobile app are currently in development.

Resistor Color Code Calculator

Decode four- and five-band resistor colors into nominal resistance, tolerance and range.

Resistor Band Decoder

Use project or equipment values from the actual specification whenever possible.

Band CountDigit 1Digit 2Digit 3MultiplierTolerance

Nominal Resistance

1,000 Î©

Tolerance: Â±5%
Minimum: 950 Î©
Maximum: 1,050 Î©

Read bands from the end opposite the tolerance band. Confirm unusual precision, temperature-coefficient and six-band parts against the datasheet.

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What Is the Resistor Color Code Calculator?

The Resistor Color Code Calculator lets you decode four- and five-band resistor colors into nominal resistance, tolerance and range. Open the workspace above to use its controls. No account or installation is required.

How It Works

Enter the values or content requested by the Resistor Color Code Calculator, choose the available options, and review the result. Where a tool offers a download or copy control, use it to keep your work. Live data, remote resources and some device features require an internet connection or browser permission.

When to Use It

Use the Resistor Color Code Calculator to decode four- and five-band resistor colors into nominal resistance, tolerance and range. Explore related calculators for the next step in your workflow. Check units, source values and any stated limitations before relying on a result.

Frequently Asked Questions

Is the Resistor Color Code Calculator free to use?: Yes. Every tool on the site is completely free, with no account, login or download required.
Is my data private?: Most tools process content on your device. Features using live data, external services or sharing make network requests. Review the tool's instructions and our Privacy Policy before using sensitive information.
Does it work on mobile?: The layout adapts to phones, tablets and desktops. Available file formats, device access and larger processing jobs depend on your browser and device.
Do I need to install anything?: No installation is needed to use the website. The optional browser extension and mobile app are currently in development.

Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.