Quick reference tables for converting inch to millimeters and millimeters to inches.
The fastest and easiest way to convert mm (millimeters) to inches is use this simple formula: inches = millimeters ÷ 25.4
Since there are 25.4 millimeters in one inch, the length in inches is equal to millimeters divided by 25.4. Thus, the formula to convert millimeters to inches is the length divided by 25.4.
Fraction Conversions
1mm = .03937″
| Fraction | Decimals | Millimeters |
|---|---|---|
| 1/64 | .015 | .397 |
| 1/32 | .031 | 3794 |
| 3/64 | .046 | 1.191 |
| 1/16 | .062 | 1.588 |
| 5/64 | .078 | 1.984 |
| 3/32 | .093 | 2.381 |
| 7/64 | .109 | 2.778 |
| 1/8 | .125 | 3.175 |
| 9/64 | .140 | 3.572 |
| 5/32 | .156 | 3.969 |
| 11/64 | .171 | 4.366 |
| 3/16 | .187 | 4.733 |
| 13/64 | .203 | 5.159 |
| 7/32 | .218 | 5.556 |
| 15/64 | .234 | 5.9532 |
| 1/4 | .250 | 6.350 |
| 17/64 | .265 | 6.747 |
| 9/32 | .281 | 7.144 |
| 19/64 | .296 | 7.541 |
| 5/16 | .312 | 7.938 |
| 21/64 | .328 | 8.334 |
| 11/32 | .343 | 8.731 |
| 23/64 | .359 | 9.128 |
| 3/8 | .375 | 9.525 |
| 25/64 | .390 | 9.922 |
| 13/32 | .406 | 10.319 |
| 27/64 | .421 | 10.716 |
| 7/16 | .437 | 11.113 |
| 29/64 | .453 | 11.509 |
| 15/32 | .468 | 11.906 |
| 31/64 | .484 | 12.303 |
| 1/2 | .500 | 12.700 |
| Fraction | Decimals | Millimeters |
|---|---|---|
| 33/64 | .515 | 13.097 |
| 17/32 | .531 | 13.494 |
| 35/64 | .546 | 13.891 |
| 9/16 | .562 | 14.288 |
| 37/64 | .578 | 14.684 |
| 19/32 | .593 | 15.081 |
| 39/64 | .609 | 15.478 |
| 5/8 | .625 | 15.875 |
| 41/64 | .640 | 16.272 |
| 21/32 | .656 | 16.669 |
| 43/64 | .671 | 17.066 |
| 11/16 | .687 | 17.463 |
| 45/64 | .703 | 17.859 |
| 23/32 | .718 | 18.256 |
| 47/64 | .734 | 18.653 |
| 3/4 | .750 | 19.050 |
| 49/64 | .765 | 19.447 |
| 25/32 | .781 | 19.844 |
| 51/64 | .796 | 20.241 |
| 13/16 | .812 | 20.638 |
| 53/64 | .828 | 21.034 |
| 27/32 | .843 | 21.431 |
| 55/64 | .859 | 21.828 |
| 7/8 | .875 | 22.225 |
| 57/64 | .890 | 22.622 |
| 29/32 | .906 | 23.019 |
| 59/64 | .921 | 23.416 |
| 15/16 | .937 | 23.813 |
| 61/64 | .953 | 24.209 |
| 31/32 | .968 | 24.606 |
| 63/64 | .984 | 25.003 |
| 1 | 1.00 | 25.400 |
Millimeter To Inch Conversions
1 mm = .03937″ and .001″ = .0254mm
| MM | IN |
|---|---|
| 1 | .039 |
| 2 | .078 |
| 3 | .118 |
| 4 | .157 |
| 5 | .196 |
| 6 | .236 |
| 7 | .275 |
| 8 | .315 |
| 9 | .354 |
| 10 | .393 |
| 11 | .433 |
| 12 | .472 |
| 13 | .511 |
| 14 | .551 |
| 15 | .590 |
| 16 | .629 |
| 17 | .669 |
| 18 | .708 |
| 19 | .748 |
| 20 | .787 |
| 21 | .826 |
| 22 | .866 |
| 23 | .905 |
| 24 | .944 |
| 25 | ..984 |
| MM | IN |
|---|---|
| 26 | 1.023 |
| 27 | 1.063 |
| 28 | 1.102 |
| 29 | 1.141 |
| 30 | 1.181 |
| 31 | 1.220 |
| 31 | 1.259 |
| 33 | 1.299 |
| 34 | 1.338 |
| 35 | 1.378 |
| 36 | 1.417 |
| 37 | 1.456 |
| 38 | 1.496 |
| 39 | 1.535 |
| 40 | 1.574 |
| 41 | 1.614 |
| 42 | 1.653 |
| 43 | 1.692 |
| 44 | 1.732 |
| 45 | 1.771 |
| 46 | 1.811 |
| 47 | 1.850 |
| 48 | 1.889 |
| 49 | 1.929 |
| 50 | .1.968 |
| MM | IN |
|---|---|
| 51 | 2.007 |
| 52 | 2.047 |
| 53 | 2.086 |
| 54 | 2.126 |
| 55 | 2.165 |
| 56 | 2.204 |
| 57 | 2.244 |
| 58 | 2.283 |
| 59 | 2.322 |
| 60 | 2.362 |
| 61 | 2.401 |
| 62 | 2.4409 |
| 63 | 2.480 |
| 64 | 2.519 |
| 65 | 2.559 |
| 66 | 2.598 |
| 67 | 2.637 |
| 68 | 2.677 |
| 69 | 2.716 |
| 70 | 2.755 |
| 71 | 2.795 |
| 72 | 2.834 |
| 73 | 2.874 |
| 74 | 2.913 |
| 75 | 2.952 |
| MM | IN |
|---|---|
| 76 | 2.992 |
| 77 | 3.031 |
| 78 | 3.070 |
| 79 | 3.110 |
| 80 | 3.149 |
| 81 | 3.189 |
| 82 | 3.228 |
| 83 | 3.267 |
| 84 | 3.307 |
| 85 | 3.346 |
| 86 | 3.385 |
| 87 | 3.425 |
| 88 | 3.464 |
| 89 | 3.503 |
| 90 | 3.543 |
| 91 | 3.582 |
| 92 | 3.622 |
| 93 | 3.661 |
| 94 | 3.700 |
| 95 | 3.740 |
| 96 | 3.779 |
| 97 | 3.818 |
| 98 | 3.858 |
| 99 | 3.897 |
| 100 | .3.937 |