Micrometer to Mil (Thou) Conversion Chart
This chart converts Micrometer (μm) to Mil (Thou) (mil) using the factor 0.039370079. One μm equals 0.039370079 mil; one mil equals 25.4 μm.
mil = μm × 0.0393701
| μm | mil |
|---|---|
| 5 | 0.1969 |
| 10 | 0.3937 |
| 15 | 0.5906 |
| 20 | 0.7874 |
| 25 | 0.9843 |
| 30 | 1.1811 |
| 35 | 1.378 |
| 40 | 1.5748 |
| 45 | 1.7717 |
| 50 | 1.9685 |
| 55 | 2.1654 |
| 60 | 2.3622 |
| 65 | 2.5591 |
| 70 | 2.7559 |
| 75 | 2.9528 |
| 80 | 3.1496 |
| 85 | 3.3465 |
| 90 | 3.5433 |
| 95 | 3.7402 |
| 100 | 3.937 |
| 105 | 4.1339 |
| 110 | 4.3307 |
| 115 | 4.5276 |
| 120 | 4.7244 |
| 125 | 4.9213 |
| 130 | 5.1181 |
| 135 | 5.315 |
| 140 | 5.5118 |
| 145 | 5.7087 |
| 150 | 5.9055 |
| 155 | 6.1024 |
| 160 | 6.2992 |
| 165 | 6.4961 |
| 170 | 6.6929 |
| 175 | 6.8898 |
| 180 | 7.0866 |
| 185 | 7.2835 |
| 190 | 7.4803 |
| 195 | 7.6772 |
| 200 | 7.874 |
| 205 | 8.0709 |
| 210 | 8.2677 |
| 215 | 8.4646 |
| 220 | 8.6614 |
| 225 | 8.8583 |
| 230 | 9.0551 |
| 235 | 9.252 |
| 240 | 9.4488 |
| 245 | 9.6457 |
| 250 | 9.8425 |
| μm | mil |
|---|---|
| 255 | 10.0394 |
| 260 | 10.2362 |
| 265 | 10.4331 |
| 270 | 10.6299 |
| 275 | 10.8268 |
| 280 | 11.0236 |
| 285 | 11.2205 |
| 290 | 11.4173 |
| 295 | 11.6142 |
| 300 | 11.811 |
| 305 | 12.0079 |
| 310 | 12.2047 |
| 315 | 12.4016 |
| 320 | 12.5984 |
| 325 | 12.7953 |
| 330 | 12.9921 |
| 335 | 13.189 |
| 340 | 13.3858 |
| 345 | 13.5827 |
| 350 | 13.7795 |
| 355 | 13.9764 |
| 360 | 14.1732 |
| 365 | 14.3701 |
| 370 | 14.5669 |
| 375 | 14.7638 |
| 380 | 14.9606 |
| 385 | 15.1575 |
| 390 | 15.3543 |
| 395 | 15.5512 |
| 400 | 15.748 |
| 405 | 15.9449 |
| 410 | 16.1417 |
| 415 | 16.3386 |
| 420 | 16.5354 |
| 425 | 16.7323 |
| 430 | 16.9291 |
| 435 | 17.126 |
| 440 | 17.3228 |
| 445 | 17.5197 |
| 450 | 17.7165 |
| 455 | 17.9134 |
| 460 | 18.1102 |
| 465 | 18.3071 |
| 470 | 18.5039 |
| 475 | 18.7008 |
| 480 | 18.8976 |
| 485 | 19.0945 |
| 490 | 19.2913 |
| 495 | 19.4882 |
| 500 | 19.685 |
How to use this chart
Find the μm value in the left column and read its mil equivalent on the right. Every row uses the same conversion factor, so the printable table is suitable for quick reference without recalculating each value.
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