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Resistor Calculator (Color Code & SMD)

Calculate resistance values interactively from 4, 5, and 6 band color codes, convert values back to color codes, or decode SMD markings (3-digit, 4-digit & EIA-96).

Band 1 (1st Digit)
Band 2 (2nd Digit)
Band 3 (3rd Digit)
Multiplier
Tolerance
Temp. Coefficient
103
SMD Resistance Value:10 kΩ
Code Type:3-Digit Standard (EIA)
Explanation:10 × 10³ Ω = 10,000 Ω = 10 kΩ
How does this tool work?

Interactive 4-, 5-, and 6-band resistor calculator with visual color band preview and SMD code decoder.

Supports bidirectional conversion between color bands and resistance values, tolerance ranges (Min/Max Ohm), temperature coefficients (PPM), and SMD resistor decoding (e.g. 103, 4702, 01C).

Where are my data processed?

Only in your browser. Your data is not sent to any server.

The tool calculates and converts with JavaScript right on your device. Input and files are not sent to us or anyone else. You can check this yourself: load the page, disconnect from the internet, and the tool keeps working in the open tab.

No Server UploadNo sign-upRuns Offline in Tab

How it works and how to check it

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