NTC 100k β3950 resistance table (°F)
Resistance in ohms of an NTC thermistor with R₂₅ = 100kΩ and β = 3950 K, calculated with the Beta model from -40 °F to 257 °F. Real parts follow their manufacturer’s R/T table, which can differ from the Beta model by a few percent far from 25 °C; use these values for design estimates and check critical points against the datasheet.
Each row is a 10-degree step; the column adds the units digit (subtracts it in rows below zero). Example: 100 + 5 → 105 °F.
| °F | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| -40 | 4018600 | |||||||||
| -30 | 2709100 | 2815800 | 2927100 | 3043400 | 3164900 | 3291900 | 3424600 | 3563300 | 3708300 | 3860000 |
| -20 | 1859400 | 1929300 | 2002000 | 2077900 | 2157000 | 2239600 | 2325700 | 2415500 | 2509200 | 2607000 |
| -10 | 1297800 | 1344300 | 1392800 | 1443200 | 1495600 | 1550300 | 1607200 | 1666400 | 1728100 | 1792400 |
| -0 | 920050 | 951600 | 984380 | 1018400 | 1053800 | 1090600 | 1128900 | 1168700 | 1210000 | 1253000 |
| 0 | 920050 | 889670 | 860420 | 832250 | 805120 | 778980 | 753800 | 729540 | 706150 | 683610 |
| 10 | 661890 | 640940 | 620730 | 601250 | 582460 | 564330 | 546830 | 529950 | 513660 | 497930 |
| 20 | 482750 | 468090 | 453930 | 440260 | 427050 | 414300 | 401970 | 390060 | 378550 | 367420 |
| 30 | 356660 | 346260 | 336210 | 326480 | 317080 | 307980 | 299170 | 290660 | 282420 | 274440 |
| 40 | 266720 | 259250 | 252010 | 245000 | 238220 | 231650 | 225280 | 219120 | 213140 | 207360 |
| 50 | 201750 | 196310 | 191040 | 185930 | 180980 | 176180 | 171520 | 167000 | 162620 | 158370 |
| 60 | 154250 | 150250 | 146370 | 142600 | 138940 | 135390 | 131950 | 128600 | 125350 | 122200 |
| 70 | 119140 | 116160 | 113270 | 110460 | 107730 | 105080 | 102500 | 100000 | 97566 | 95200 |
| 80 | 92900 | 90664 | 88489 | 86374 | 84318 | 82317 | 80371 | 78478 | 76637 | 74845 |
| 90 | 73101 | 71404 | 69752 | 68144 | 66579 | 65055 | 63572 | 62127 | 60720 | 59350 |
| 100 | 58016 | 56716 | 55450 | 54217 | 53015 | 51844 | 50702 | 49590 | 48506 | 47449 |
| 110 | 46419 | 45415 | 44436 | 43481 | 42550 | 41643 | 40757 | 39894 | 39051 | 38229 |
| 120 | 37427 | 36645 | 35882 | 35137 | 34410 | 33700 | 33008 | 32332 | 31672 | 31028 |
| 130 | 30399 | 29784 | 29185 | 28599 | 28027 | 27468 | 26922 | 26389 | 25868 | 25359 |
| 140 | 24862 | 24376 | 23901 | 23437 | 22983 | 22540 | 22106 | 21683 | 21269 | 20864 |
| 150 | 20468 | 20081 | 19702 | 19332 | 18970 | 18615 | 18269 | 17930 | 17598 | 17274 |
| 160 | 16957 | 16646 | 16342 | 16045 | 15754 | 15469 | 15190 | 14917 | 14650 | 14388 |
| 170 | 14132 | 13881 | 13636 | 13395 | 13160 | 12929 | 12703 | 12482 | 12265 | 12053 |
| 180 | 11845 | 11641 | 11442 | 11246 | 11055 | 10867 | 10683 | 10502 | 10326 | 10152 |
| 190 | 9982.4 | 9815.9 | 9652.7 | 9492.7 | 9335.8 | 9181.9 | 9031.1 | 8883.2 | 8738.1 | 8595.9 |
| 200 | 8456.4 | 8319.5 | 8185.3 | 8053.7 | 7924.5 | 7797.8 | 7673.5 | 7551.5 | 7431.9 | 7314.5 |
| 210 | 7199.2 | 7086.2 | 6975.2 | 6866.3 | 6759.4 | 6654.5 | 6551.5 | 6450.4 | 6351.2 | 6253.7 |
| 220 | 6158.1 | 6064.2 | 5971.9 | 5881.4 | 5792.5 | 5705.2 | 5619.4 | 5535.2 | 5452.5 | 5371.2 |
| 230 | 5291.4 | 5213 | 5136 | 5060.3 | 4986 | 4913 | 4841.2 | 4770.7 | 4701.4 | 4633.4 |
| 240 | 4566.5 | 4500.7 | 4436.1 | 4372.6 | 4310.2 | 4248.8 | 4188.5 | 4129.2 | 4070.9 | 4013.6 |
| 250 | 3957.2 | 3901.8 | 3847.4 | 3793.8 | 3741.1 | 3689.4 | 3638.4 | 3588.3 |
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