Convert millimetres to inches — table and converter

To convert millimetres to inches use the the form or the table below.

Length in millimetres:
1 mm = 0.03937 inches

See the definitions of a millimetre and an inch.
See the table for the reverse conversion from inches into millimetres.


Millimetres to inches
From 0 to 1 From 1 to 100 From 101 to 200
Mm Inches Mm Inches Mm Inches
0.01 0.00039 1 0.03937 101 3.97638
0.02 0.00079 2 0.07874 102 4.01575
0.03 0.00118 3 0.11811 103 4.05512
0.04 0.00157 4 0.15748 104 4.09449
0.05 0.00197 5 0.19685 105 4.13386
0.06 0.00236 6 0.23622 106 4.17323
0.07 0.00276 7 0.27559 107 4.21260
0.08 0.00315 8 0.31496 108 4.25197
0.09 0.00354 9 0.35433 109 4.29134
0.10 0.00394 10 0.39370 110 4.33071
0.11 0.00433 11 0.43307 111 4.37008
0.12 0.00472 12 0.47244 112 4.40945
0.13 0.00512 13 0.51181 113 4.44882
0.14 0.00551 14 0.55118 114 4.48819
0.15 0.00591 15 0.59055 115 4.52756
0.16 0.00630 16 0.62992 116 4.56693
0.17 0.00669 17 0.66929 117 4.60630
0.18 0.00709 18 0.70866 118 4.64567
0.19 0.00748 19 0.74803 119 4.68504
0.20 0.00787 20 0.78740 120 4.72441
0.21 0.00827 21 0.82677 121 4.76378
0.22 0.00866 22 0.86614 122 4.80315
0.23 0.00906 23 0.90551 123 4.84252
0.24 0.00945 24 0.94488 124 4.88189
0.25 0.00984 25 0.98425 125 4.92126
Mm Inches Mm Inches Mm Inches
0.26 0.01024 26 1.02362 126 4.96063
0.27 0.01063 27 1.06299 127 5.00000
0.28 0.01102 28 1.10236 128 5.03937
0.29 0.01142 29 1.14173 129 5.07874
0.30 0.01181 30 1.18110 130 5.11811
0.31 0.01220 31 1.22047 131 5.15748
0.32 0.01260 32 1.25984 132 5.19685
0.33 0.01299 33 1.29921 133 5.23622
0.34 0.01339 34 1.33858 134 5.27559
0.35 0.01378 35 1.37795 135 5.31496
0.36 0.01417 36 1.41732 136 5.35433
0.37 0.01457 37 1.45669 137 5.39370
0.38 0.01496 38 1.49606 138 5.43307
0.39 0.01535 39 1.53543 139 5.47244
0.40 0.01575 40 1.57480 140 5.51181
0.41 0.01614 41 1.61417 141 5.55118
0.42 0.01654 42 1.65354 142 5.59055
0.43 0.01693 43 1.69291 143 5.62992
0.44 0.01732 44 1.73228 144 5.66929
0.45 0.01772 45 1.77165 145 5.70866
0.46 0.01811 46 1.81102 146 5.74803
0.47 0.01850 47 1.85039 147 5.78740
0.48 0.01890 48 1.88976 148 5.82677
0.49 0.01929 49 1.92913 149 5.86614
0.50 0.01969 50 1.96850 150 5.90551
Mm Inches Mm Inches Mm Inches
0.51 0.02008 51 2.00787 151 5.94488
0.52 0.02047 52 2.04724 152 5.98425
0.53 0.02087 53 2.08661 153 6.02362
0.54 0.02126 54 2.12598 154 6.06299
0.55 0.02165 55 2.16535 155 6.10236
0.56 0.02205 56 2.20472 156 6.14173
0.57 0.02244 57 2.24409 157 6.18110
0.58 0.02283 58 2.28346 158 6.22047
0.59 0.02323 59 2.32283 159 6.25984
0.60 0.02362 60 2.36220 160 6.29921
0.61 0.02402 61 2.40157 161 6.33858
0.62 0.02441 62 2.44094 162 6.37795
0.63 0.02480 63 2.48031 163 6.41732
0.64 0.02520 64 2.51969 164 6.45669
0.65 0.02559 65 2.55906 165 6.49606
0.66 0.02598 66 2.59843 166 6.53543
0.67 0.02638 67 2.63780 167 6.57480
0.68 0.02677 68 2.67717 168 6.61417
0.69 0.02717 69 2.71654 169 6.65354
0.70 0.02756 70 2.75591 170 6.69291
0.71 0.02795 71 2.79528 171 6.73228
0.72 0.02835 72 2.83465 172 6.77165
0.73 0.02874 73 2.87402 173 6.81102
0.74 0.02913 74 2.91339 174 6.85039
0.75 0.02953 75 2.95276 175 6.88976
Mm Inches Mm Inches Mm Inches
0.76 0.02992 76 2.99213 176 6.92913
0.77 0.03031 77 3.03150 177 6.96850
0.78 0.03071 78 3.07087 178 7.00787
0.79 0.03110 79 3.11024 179 7.04724
0.80 0.03150 80 3.14961 180 7.08661
0.81 0.03189 81 3.18898 181 7.12598
0.82 0.03228 82 3.22835 182 7.16535
0.83 0.03268 83 3.26772 183 7.20472
0.84 0.03307 84 3.30709 184 7.24409
0.85 0.03346 85 3.34646 185 7.28346
0.86 0.03386 86 3.38583 186 7.32283
0.87 0.03425 87 3.42520 187 7.36220
0.88 0.03465 88 3.46457 188 7.40157
0.89 0.03504 89 3.50394 189 7.44094
0.90 0.03543 90 3.54331 190 7.48031
0.91 0.03583 91 3.58268 191 7.51969
0.92 0.03622 92 3.62205 192 7.55906
0.93 0.03661 93 3.66142 193 7.59843
0.94 0.03701 94 3.70079 194 7.63780
0.95 0.03740 95 3.74016 195 7.67717
0.96 0.03780 96 3.77953 196 7.71654
0.97 0.03819 97 3.81890 197 7.75591
0.98 0.03858 98 3.85827 198 7.79528
0.99 0.03898 99 3.89764 199 7.83465
1.00 0.03937 100 3.93701 200 7.87402
Mm Inches Mm Inches Mm Inches
Millimetres to inches
From 201 to 300 From 301 to 400 From 401 to 500
Mm Inches Mm Inches Mm Inches
201 7.91339 301 11.85039 401 15.78740
202 7.95276 302 11.88976 402 15.82677
203 7.99213 303 11.92913 403 15.86614
204 8.03150 304 11.96850 404 15.90551
205 8.07087 305 12.00787 405 15.94488
206 8.11024 306 12.04724 406 15.98425
207 8.14961 307 12.08661 407 16.02362
208 8.18898 308 12.12598 408 16.06299
209 8.22835 309 12.16535 409 16.10236
210 8.26772 310 12.20472 410 16.14173
211 8.30709 311 12.24409 411 16.18110
212 8.34646 312 12.28346 412 16.22047
213 8.38583 313 12.32283 413 16.25984
214 8.42520 314 12.36220 414 16.29921
215 8.46457 315 12.40157 415 16.33858
216 8.50394 316 12.44094 416 16.37795
217 8.54331 317 12.48031 417 16.41732
218 8.58268 318 12.51969 418 16.45669
219 8.62205 319 12.55906 419 16.49606
220 8.66142 320 12.59843 420 16.53543
221 8.70079 321 12.63780 421 16.57480
222 8.74016 322 12.67717 422 16.61417
223 8.77953 323 12.71654 423 16.65354
224 8.81890 324 12.75591 424 16.69291
225 8.85827 325 12.79528 425 16.73228
Mm Inches Mm Inches Mm Inches
226 8.89764 326 12.83465 426 16.77165
227 8.93701 327 12.87402 427 16.81102
228 8.97638 328 12.91339 428 16.85039
229 9.01575 329 12.95276 429 16.88976
230 9.05512 330 12.99213 430 16.92913
231 9.09449 331 13.03150 431 16.96850
232 9.13386 332 13.07087 432 17.00787
233 9.17323 333 13.11024 433 17.04724
234 9.21260 334 13.14961 434 17.08661
235 9.25197 335 13.18898 435 17.12598
236 9.29134 336 13.22835 436 17.16535
237 9.33071 337 13.26772 437 17.20472
238 9.37008 338 13.30709 438 17.24409
239 9.40945 339 13.34646 439 17.28346
240 9.44882 340 13.38583 440 17.32283
241 9.48819 341 13.42520 441 17.36220
242 9.52756 342 13.46457 442 17.40157
243 9.56693 343 13.50394 443 17.44094
244 9.60630 344 13.54331 444 17.48031
245 9.64567 345 13.58268 445 17.51969
246 9.68504 346 13.62205 446 17.55906
247 9.72441 347 13.66142 447 17.59843
248 9.76378 348 13.70079 448 17.63780
249 9.80315 349 13.74016 449 17.67717
250 9.84252 350 13.77953 450 17.71654
Mm Inches Mm Inches Mm Inches
251 9.88189 351 13.81890 451 17.75591
252 9.92126 352 13.85827 452 17.79528
253 9.96063 353 13.89764 453 17.83465
254 10.00000 354 13.93701 454 17.87402
255 10.03937 355 13.97638 455 17.91339
256 10.07874 356 14.01575 456 17.95276
257 10.11811 357 14.05512 457 17.99213
258 10.15748 358 14.09449 458 18.03150
259 10.19685 359 14.13386 459 18.07087
260 10.23622 360 14.17323 460 18.11024
261 10.27559 361 14.21260 461 18.14961
262 10.31496 362 14.25197 462 18.18898
263 10.35433 363 14.29134 463 18.22835
264 10.39370 364 14.33071 464 18.26772
265 10.43307 365 14.37008 465 18.30709
266 10.47244 366 14.40945 466 18.34646
267 10.51181 367 14.44882 467 18.38583
268 10.55118 368 14.48819 468 18.42520
269 10.59055 369 14.52756 469 18.46457
270 10.62992 370 14.56693 470 18.50394
271 10.66929 371 14.60630 471 18.54331
272 10.70866 372 14.64567 472 18.58268
273 10.74803 373 14.68504 473 18.62205
274 10.78740 374 14.72441 474 18.66142
275 10.82677 375 14.76378 475 18.70079
Mm Inches Mm Inches Mm Inches
276 10.86614 376 14.80315 476 18.74016
277 10.90551 377 14.84252 477 18.77953
278 10.94488 378 14.88189 478 18.81890
279 10.98425 379 14.92126 479 18.85827
280 11.02362 380 14.96063 480 18.89764
281 11.06299 381 15.00000 481 18.93701
282 11.10236 382 15.03937 482 18.97638
283 11.14173 383 15.07874 483 19.01575
284 11.18110 384 15.11811 484 19.05512
285 11.22047 385 15.15748 485 19.09449
286 11.25984 386 15.19685 486 19.13386
287 11.29921 387 15.23622 487 19.17323
288 11.33858 388 15.27559 488 19.21260
289 11.37795 389 15.31496 489 19.25197
290 11.41732 390 15.35433 490 19.29134
291 11.45669 391 15.39370 491 19.33071
292 11.49606 392 15.43307 492 19.37008
293 11.53543 393 15.47244 493 19.40945
294 11.57480 394 15.51181 494 19.44882
295 11.61417 395 15.55118 495 19.48819
296 11.65354 396 15.59055 496 19.52756
297 11.69291 397 15.62992 497 19.56693
298 11.73228 398 15.66929 498 19.60630
299 11.77165 399 15.70866 499 19.64567
300 11.81102 400 15.74803 500 19.68504
Mm Inches Mm Inches Mm Inches

Units of length: millimetre and inch

A millimetre (mm) is a unit of length within the metric system of units, which in its current form is called the International System of Units (SI).

The base unit of length in SI is the metre. The prefix milli means "one-thousandth", so 1 millimetre equals 0.001 metre or 0.1 centimetre.

1 millimetre is approximately equal to 0.03937 inches.

An inch (in or ″) is a unit of length within the imperial system of units, a system of weights and measures traditionally used throughout the British Empire.

The imperial system was officially replaced by the metric system in almost all countries. Nevertheless, it is still widely used in the United Kingdom, Canada, and some other members of the Commonwealth, as well as in the United States.

1 inch equals exactly 25.4 millimetres or 2.54 centimetres.