Decode Any SMD Component Marking
A free browser-based SMD code decoder that identifies resistor and capacitor values from surface-mount markings. Supports 3-digit, 4-digit, and EIA-96 coding systems with auto-detection. Includes reverse lookup, package size reference, and a full EIA-96 code table.
How to Decode SMD Markings
1
Enter the code
Type the marking from the SMD component — numbers and/or letters exactly as printed. The decoder auto-detects the system.
2
Read the result
See the decoded resistance or capacitance value with the identified coding system and typical tolerance.
3
Use reverse lookup
Enter a known value (e.g. 4.7kΩ) to find all possible SMD codes for that component.
Identify SMD resistors and capacitors by their tiny marking codes
—
Value → Code
SMD Package Sizes
| Code | Metric | Size (mm) |
|---|---|---|
| 0201 | 0603 | 0.6 × 0.3 |
| 0402 | 1005 | 1.0 × 0.5 |
| 0603 | 1608 | 1.6 × 0.8 |
| 0805 | 2012 | 2.0 × 1.25 |
| 1206 | 3216 | 3.2 × 1.6 |
| 1210 | 3225 | 3.2 × 2.5 |
| 1812 | 4532 | 4.5 × 3.2 |
| 2010 | 5025 | 5.0 × 2.5 |
| 2512 | 6332 | 6.3 × 3.2 |
EIA-96 Code Table
Two digits + one letter. Digits = base value from table, letter = multiplier (S=×0.01, R=×0.1, A=×1, B=×10, C=×100, D=×1k, E=×10k, F=×100k)
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