How do I use the calculator?

Select the colors for each band of your resistor, and the calculator will show the resistance value and tolerance.

Does it support 4-band and 5-band resistors?

Yes, you can select either 4-band or 5-band resistor mode.

Can I use it for any resistor?

Yes, it works for standard resistors with color-coded bands.

Do I need to register?

No registration is required. It is completely free and instant.

Resistor Color Code Calculator

Q: Is this calculator free?

Yes, the Resistor Color Code Calculator is completely free to use.

Select the color bands of a resistor to find its resistance and tolerance.

Select Band 1

Select Band 2

Select Multiplier

Select Tolerance

Resistance

-- Ω

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About Resistor Color Codes

Resistor color codes are used to indicate resistance values and tolerance. Using color bands, you can easily determine the resistor value without reading tiny printed numbers.

How to Use?

Select the colors for the first two significant digits.
Select the multiplier color band.
Select the tolerance band.
Click "Calculate Resistance" to see the value in ohms.

Frequently Asked Questions

Yes, the Resistor Color Code Calculator is completely free.

Yes, it calculates resistance for standard 4-band resistors.

Yes, it works for standard resistors with color bands.

Tolerance indicates the accuracy of the resistor's value. For example, ±5% means the actual value can vary by 5%.

No registration is required. The calculator is free and instant.