About this SMD resistor code calculator
Decode the marking on surface-mount resistors. Supports 3-digit codes (103 = 10 kΩ), 4-digit codes (1002 = 10 kΩ), R notation for low values (4R7 = 4.7 Ω) and the EIA-96 system used on 1 % 0603 parts (01C = 10 kΩ).
How to use the SMD Resistor Code Calculator
- Type the code printed on the resistor.
- Read the resistance and coding system.
Example
472 → 4.7 kΩ; 01C → 10 kΩ
Frequently asked questions
What does 000 mean?
A zero-ohm resistor used as a jumper.
Is my data safe?
Yes. The tool runs entirely in your browser using WebAssembly. Nothing you type or upload is sent to a server, logged or stored.
Is it free?
Yes, completely free with no sign-up, no limits and no watermarks. It also works offline once the page has loaded.