SMD resistor code

SMD resistors have a code consisting of three or four number or letters. You can use the calculator below to calculate the resistance of an SMD resistor. Some resistors use colored bands instead of numbers. You can find more information about those here.

Resistance: 0

Codes

Three digits

The first two digits represent the significant number. This number is multiplied by ten to the power of the last digit to get the resistance of the resistor.

Four digits

Four digit resistors have three significant digits instead of two. This number is also multiplied by ten to the power of the last digit.

Decimal point

Some resistors contain the letter R, which represents the decimal point. Resistors with the letter R have no multiplier, so all digits are linked together with a decimal point in the place of the R.

EIA-96 system

Some resistors have a code consisting of two numbers and one letter at the end. the two numbers represent a number with three significant digits. The letter at the end represents a specific power of ten. You can find all these values in the table below.

code number code number code number code number
01 100 26 182 51 332 76 604
02 102 27 187 52 340 77 619
03 105 28 191 53 348 78 634
04 107 29 196 54 357 79 649
05 110 30 200 55 365 80 665
06 113 31 205 56 374 81 681
07 115 32 210 57 383 82 698
08 118 33 215 58 392 83 715
09 121 34 221 59 402 84 732
10 124 35 226 60 412 85 750
11 127 36 232 61 422 86 768
12 130 37 237 62 432 87 787
13 133 38 243 63 442 88 806
14 140 39 249 64 453 89 825
15 137 40 255 65 464 90 845
16 143 41 261 66 475 91 866
17 147 42 267 67 487 92 887
18 150 43 274 68 499 93 909
19 154 44 280 69 511 94 931
20 158 45 287 70 523 95 953
21 162 46 294 71 536 96 976
22 165 47 301 72 549 - -
23 169 48 309 73 562 - -
24 174 49 316 74 576 - -
25 178 50 324 75 590 - -
letter multiplication letter multiplication
Z 0.001 B 10
Y 0.01 H 10
R 0.01 C 100
X 0.1 D 1000
S 0.1 E 10,000
A 1 F 100,000