SMD resistor code calculator
Type the code printed on a surface-mount resistor to get its value, or type a value to see how it would be marked. Handles 3-digit, 4-digit, EIA-96 and R-notation codes, and zero-ohm jumpers.
Value → SMD code
How SMD resistor codes work
3-digit codes (standard ±5% parts): the first two digits are the value and the third is the number of zeros. 103 = 10 followed by 3 zeros = 10,000 Ω = 10 kΩ. 220 is 22 Ω, not 220 Ω.
4-digit codes (±1% parts): three digits plus a multiplier. 1002 = 100 × 10² = 10 kΩ, 4991 = 499 × 10 = 4.99 kΩ.
R notation: the letter R marks the decimal point for values under 10 Ω (3-digit) or 100 Ω (4-digit). 4R7 = 4.7 Ω, R47 = 0.47 Ω.
EIA-96 (±1% parts in small 0603 and 0402 packages): two digits index the 96 values of the E96 series and a letter is the multiplier. 01C = 100 × 100 = 10 kΩ. See the full EIA-96 code table.
0, 00 or 000 marks a zero-ohm resistor — a jumper link that a pick-and-place machine can fit like any other part.
Common SMD codes
| Code | Type | Value |
|---|---|---|
000 | jumper | 0 Ω (jumper) |
R47 | R notation | 0.47 Ω |
4R7 | R notation | 4.7 Ω |
100 | 3-digit | 10 Ω |
221 | 3-digit | 220 Ω |
471 | 3-digit | 470 Ω |
102 | 3-digit | 1 kΩ |
472 | 3-digit | 4.7 kΩ |
103 | 3-digit | 10 kΩ |
473 | 3-digit | 47 kΩ |
104 | 3-digit | 100 kΩ |
105 | 3-digit | 1 MΩ |
1002 | 4-digit | 10 kΩ |
4701 | 4-digit | 4.7 kΩ |
4991 | 4-digit | 4.99 kΩ |
01A | EIA-96 | 100 Ω |
01C | EIA-96 | 10 kΩ |
39D | EIA-96 | 249 kΩ |
68X | EIA-96 | 49.9 Ω |
Very small parts (0402 and below) are usually unmarked; measure them with a multimeter or check the reel label. Learn more in SMD resistor codes explained.
FAQ
What does 103 mean on an SMD resistor?
103 means 10 × 10³ = 10,000 Ω (10 kΩ). The last digit is the number of zeros.
What does 01C mean on a resistor?
01C is an EIA-96 code: 01 is the first E96 value (100) and C means ×100, so 01C = 10 kΩ ±1%.
What does R mean in a resistor code?
R is the decimal point: 4R7 = 4.7 Ω and R10 = 0.1 Ω.
What does 000 mean on an SMD resistor?
It is a zero-ohm resistor, used as a jumper.