Resistor finder
Finds a combination of two series or parallel connected resistors for a custom value. Returns a list of the best values found.
| Example 1: Must calculate the combination of 1% resistors to produce a resistance of 66 kilo-ohms | View example |
You may use one of the following SI prefix after a value: p=pico, n=nano, u=micro, m=milli, k=kilo, M=mega, G=giga
| Configuration | Resistor R1 | Resistor R2 | Total resistance | Error-% |
| Series | 46.4 kilo-ohms | 19.6 kilo-ohms | 66 kilo-ohms | 0% |
| Series | 52.3 kilo-ohms | 13.7 kilo-ohms | 66 kilo-ohms | 0% |
| Series | 53.6 kilo-ohms | 12.4 kilo-ohms | 66 kilo-ohms | 0% |
| Series | 64.9 kilo-ohms | 1.1 kilo-ohms | 66 kilo-ohms | 0% |
| Parallel | 165 kilo-ohms | 110 kilo-ohms | 66 kilo-ohms | 0% |
| Parallel | 187 kilo-ohms | 102 kilo-ohms | 66 kilo-ohms | 0% |
| Parallel | 8.87 megaohms | 66.5 kilo-ohms | ~66.005147 kilo-ohms | ~0.008% |
| Parallel | 8.66 megaohms | 66.5 kilo-ohms | ~65.993239 kilo-ohms | ~-0.01% |
| Parallel | 1.21 megaohms | 69.8 kilo-ohms | ~65.993124 kilo-ohms | ~-0.01% |
| Parallel | 2.15 megaohms | 68.1 kilo-ohms | ~66.009197 kilo-ohms | ~0.014% |
| Series | 63.4 kilo-ohms | 2.61 kilo-ohms | 66.01 kilo-ohms | ~0.015% |
| Parallel | 549 kilo-ohms | 75 kilo-ohms | ~65.985577 kilo-ohms | ~-0.022% |
| Parallel | 9.09 megaohms | 66.5 kilo-ohms | ~66.017037 kilo-ohms | ~0.026% |
| Parallel | 8.45 megaohms | 66.5 kilo-ohms | ~65.980743 kilo-ohms | ~-0.029% |
| Series | 59 kilo-ohms | 6.98 kilo-ohms | 65.98 kilo-ohms | ~-0.03% |
| Series | 61.9 kilo-ohms | 4.12 kilo-ohms | 66.02 kilo-ohms | ~0.03% |
| Series | 60.4 kilo-ohms | 5.62 kilo-ohms | 66.02 kilo-ohms | ~0.03% |
| Parallel | 365 kilo-ohms | 80.6 kilo-ohms | ~66.021095 kilo-ohms | ~0.032% |
| Parallel | 301 kilo-ohms | 84.5 kilo-ohms | ~65.977951 kilo-ohms | ~-0.033% |
| Parallel | 9.31 megaohms | 66.5 kilo-ohms | ~66.028369 kilo-ohms | ~0.043% |
| Series | 64.9 kilo-ohms | 1.07 kilo-ohms | 65.97 kilo-ohms | ~-0.045% |
| Series | 64.9 kilo-ohms | 1.13 kilo-ohms | 66.03 kilo-ohms | ~0.045% |
| Parallel | 215 kilo-ohms | 95.3 kilo-ohms | ~66.03126 kilo-ohms | ~0.047% |
| Parallel | 8.25 megaohms | 66.5 kilo-ohms | ~65.968256 kilo-ohms | ~-0.048% |
| Parallel | 2.1 megaohms | 68.1 kilo-ohms | ~65.96098 kilo-ohms | ~-0.059% |
| Parallel | 9.53 megaohms | 66.5 kilo-ohms | ~66.039181 kilo-ohms | ~0.059% |
| Series | 56.2 kilo-ohms | 9.76 kilo-ohms | 65.96 kilo-ohms | ~-0.061% |
| Parallel | 178 kilo-ohms | 105 kilo-ohms | ~66.042403 kilo-ohms | ~0.064% |
| Parallel | 8.06 megaohms | 66.5 kilo-ohms | ~65.955824 kilo-ohms | ~-0.067% |
| Parallel | 150 kilo-ohms | 118 kilo-ohms | ~66.044776 kilo-ohms | ~0.068% |
| Parallel | 866 kilo-ohms | 71.5 kilo-ohms | ~66.046933 kilo-ohms | ~0.071% |
| Parallel | 9.76 megaohms | 66.5 kilo-ohms | ~66.049967 kilo-ohms | ~0.076% |
| Series | 64.9 kilo-ohms | 1.15 kilo-ohms | 66.05 kilo-ohms | ~0.076% |
| Series | 57.6 kilo-ohms | 8.45 kilo-ohms | 66.05 kilo-ohms | ~0.076% |
| Series | 64.9 kilo-ohms | 1.05 kilo-ohms | 65.95 kilo-ohms | ~-0.076% |
| Series | 63.4 kilo-ohms | 2.55 kilo-ohms | 65.95 kilo-ohms | ~-0.076% |
| Parallel | 7.87 megaohms | 66.5 kilo-ohms | ~65.942796 kilo-ohms | ~-0.087% |
| Parallel | 665 kilo-ohms | 73.2 kilo-ohms | ~65.941479 kilo-ohms | ~-0.089% |
| Parallel | 226 kilo-ohms | 93.1 kilo-ohms | ~65.937324 kilo-ohms | ~-0.095% |
| Parallel | 2.21 megaohms | 68.1 kilo-ohms | ~66.064264 kilo-ohms | ~0.097% |
| Series | 63.4 kilo-ohms | 2.67 kilo-ohms | 66.07 kilo-ohms | ~0.106% |
| Parallel | 7.68 megaohms | 66.5 kilo-ohms | ~65.929129 kilo-ohms | ~-0.107% |
| Parallel | 412 kilo-ohms | 78.7 kilo-ohms | ~66.077848 kilo-ohms | ~0.118% |
| Parallel | 845 kilo-ohms | 71.5 kilo-ohms | ~65.921986 kilo-ohms | ~-0.118% |
| Parallel | 332 kilo-ohms | 82.5 kilo-ohms | ~66.079614 kilo-ohms | ~0.121% |
| Series | 64.9 kilo-ohms | 1.18 kilo-ohms | 66.08 kilo-ohms | ~0.121% |
| Series | 61.9 kilo-ohms | 4.02 kilo-ohms | 65.92 kilo-ohms | ~-0.121% |
| Series | 64.9 kilo-ohms | 1.02 kilo-ohms | 65.92 kilo-ohms | ~-0.121% |
| Parallel | 1.24 megaohms | 69.8 kilo-ohms | ~66.080318 kilo-ohms | ~0.122% |
| Parallel | 7.5 megaohms | 66.5 kilo-ohms | ~65.915549 kilo-ohms | ~-0.128% |
| Parallel | 2.05 megaohms | 68.1 kilo-ohms | ~65.910486 kilo-ohms | ~-0.136% |
| Parallel | 137 kilo-ohms | 127 kilo-ohms | ~65.905303 kilo-ohms | ~-0.143% |
| Parallel | 681 kilo-ohms | 73.2 kilo-ohms | ~66.095465 kilo-ohms | ~0.145% |
| Parallel | 1.18 megaohms | 69.8 kilo-ohms | ~65.901744 kilo-ohms | ~-0.149% |
| Parallel | 7.32 megaohms | 66.5 kilo-ohms | ~65.901306 kilo-ohms | ~-0.15% |
| Series | 48.7 kilo-ohms | 17.4 kilo-ohms | 66.1 kilo-ohms | ~0.152% |
| Series | 37.4 kilo-ohms | 28.7 kilo-ohms | 66.1 kilo-ohms | ~0.152% |
| Series | 41.2 kilo-ohms | 24.9 kilo-ohms | 66.1 kilo-ohms | ~0.152% |
| Series | 51.1 kilo-ohms | 15 kilo-ohms | 66.1 kilo-ohms | ~0.152% |
| Series | 49.9 kilo-ohms | 16.2 kilo-ohms | 66.1 kilo-ohms | ~0.152% |
| Series | 42.2 kilo-ohms | 23.7 kilo-ohms | 65.9 kilo-ohms | ~-0.152% |
| Series | 64.9 kilo-ohms | 1 kilo-ohms | 65.9 kilo-ohms | ~-0.152% |
| Series | 54.9 kilo-ohms | 11 kilo-ohms | 65.9 kilo-ohms | ~-0.152% |
| Series | 39.2 kilo-ohms | 26.7 kilo-ohms | 65.9 kilo-ohms | ~-0.152% |
| Series | 36.5 kilo-ohms | 29.4 kilo-ohms | 65.9 kilo-ohms | ~-0.152% |
| Parallel | 464 kilo-ohms | 76.8 kilo-ohms | ~65.893491 kilo-ohms | ~-0.161% |
| Parallel | 2.26 megaohms | 68.1 kilo-ohms | ~66.107985 kilo-ohms | ~0.164% |
| Series | 64.9 kilo-ohms | 1.21 kilo-ohms | 66.11 kilo-ohms | ~0.167% |
| Series | 60.4 kilo-ohms | 5.49 kilo-ohms | 65.89 kilo-ohms | ~-0.167% |
| Series | 63.4 kilo-ohms | 2.49 kilo-ohms | 65.89 kilo-ohms | ~-0.167% |
| Parallel | 475 kilo-ohms | 76.8 kilo-ohms | ~66.11091 kilo-ohms | ~0.168% |
| Parallel | 7.15 megaohms | 66.5 kilo-ohms | ~65.887203 kilo-ohms | ~-0.171% |
| Parallel | 158 kilo-ohms | 113 kilo-ohms | ~65.881919 kilo-ohms | ~-0.179% |
| Series | 61.9 kilo-ohms | 4.22 kilo-ohms | 66.12 kilo-ohms | ~0.182% |
| Parallel | 205 kilo-ohms | 97.6 kilo-ohms | ~66.120291 kilo-ohms | ~0.182% |
| Series | 64.9 kilo-ohms | 976 ohms | 65.876 kilo-ohms | ~-0.188% |
| Parallel | 6.98 megaohms | 66.5 kilo-ohms | ~65.872419 kilo-ohms | ~-0.193% |
