Result
Resistance
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Code Type
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Tolerance
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Decode resistor markings and calculate resistance from 3-digit, 4-digit, and EIA-96 SMD codes.
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Common 3-digit, 4-digit, and R notation SMD resistor codes for quick reference.
| Code | Resistance | Note |
|---|---|---|
| 000 | 0 Ω | Jumper or zero-ohm link |
| 100 | 10 Ω | 10 × 10^0 |
| 220 | 22 Ω | 22 × 10^0 |
| 471 | 470 Ω | 47 × 10^1 |
| 102 | 1 kΩ | 10 × 10^2 |
| 103 | 10 kΩ | 10 × 10^3 |
| 104 | 100 kΩ | 10 × 10^4 |
| 105 | 1 MΩ | 10 × 10^5 |
| 4701 | 4.7 kΩ | 470 × 10^1 |
| 1002 | 10 kΩ | 100 × 10^2 |
| 4R7 | 4.7 Ω | R is the decimal point |
| R10 | 0.10 Ω | R is the decimal point |
SMD resistor markings are compact codes for resistance values. Most chips use either a numeric format (3-digit or 4-digit) or EIA-96 (two digits plus one letter). Once you identify the format, converting the code to ohms is straightforward.
First 2 digits = significant value, last digit = multiplier.
Example: 103 → 10 × 10³ = 10,000 Ω (10 kΩ)
First 3 digits = significant value, last digit = multiplier.
Example: 1001 → 100 × 10¹ = 1,000 Ω (1 kΩ)
EIA-96 markings use two digits for the significant value and one letter for the multiplier. They are commonly used on 1% precision SMD resistors.
Example: 01C → 100 × 100 = 10,000 Ω (10 kΩ)
| Code | Resistance | Note |
|---|---|---|
| 01A | 100 Ω | EIA-96 value 100 × multiplier A |
| 10C | 12.4 kΩ | Example EIA-96 precision code |
| 49C | 31.6 kΩ | Example EIA-96 precision code |
| 68X | 49.9 Ω | X multiplier is ×0.1 in this calculator |
103 means 10 × 10^3 ohms, which is 10 kΩ.
4R7 uses R as the decimal point, so it means 4.7 Ω.
EIA-96 uses two digits for the significant value and one letter for the multiplier, commonly on 1% precision SMD resistors.