ENGLISH TO METRIC CONVERSION TABLE
 Inches    Inches   Inches   Inches  
 Dec. mm  Dec. Mm Frac. Dec. Mm Frac. Dec mm
0.01 0.2540 0.51 12.9540 1/61 0.015625 0.3969 33/64 0.515625 13.0969
0.02 0.5080 0.52 13.2080 1/32 0.031250 0.7938 17/32 0.531250 13.4938
0.03 0.7620 0.53 13.4620 3/64 0.046875 1.1906 35/64 0.546875 13.8906
0.04 1.0160 0.54 13.7160 1/16 0.062500 1.5875 9/16 0.562500 14.2875
0.05 1.2700 0.55 13.9700 5/64 0.078125 1.9844 37/64 0.578125 14.6841
0.06 1.5240 0.56 14.2240 3/32 0.093750 2.3812 19/32 0.593750 15.0812
0.07 1.7780 0.57 14.4780 7/64 0.109375 2.7781 39/64 0.609375 15.4781
0.08 2.0320 0.58 17.7320 1/8 0.125000 3.1750 5/8 0.625000 15.8750
0.09 2.2860 0.59 14.9860 9/64 0.140625 3.5719 41/64 0.640625 16.2719
0.10 2.5400 0.60 15.2400 5/32 0.156250 3.9688 21/32 0.656250 16.6688
0.11 2.7940 0.61 15.4940 11/64 0.171875 4.3656 43/64 0.671875 17.0656
0.12 3.0480 0.62 15.7480 3/16 0.187500 4.7625 11/16 0.687500 17.4625
0.13 3.3020 0.63 16.0020 13/64 0.203125 5.1594 45/64 0.703125 17.8594
0.14 3.5560 0.64 16.2560 7/32 0.218750 5.5562 23/32 0.718750 18.2562
0.15 3.8100 0.65 16.5100 15/64 0.234375 5.9531 47/64 0.734375 18.6531
0.16 4.0640 0.66 16.7640 1/4 0.250000 6.3500 3/4 0.750000 19.0500
0.17 4.3180 0.67 17.0180 17/64 0.265625 6.7469 49/64 0.765625 19.4469
0.18 4.5720 0.68 17.2720 9/32 0.281250 7.1438 25/32 0.781250 19.8437
0.19 4.8260 0.69 17.5260 19/64 0.296875 7.5406 51/64 0.796875 20.2406
0.20 5.0800 0.70 17.7800 5/16 0.312500 7.9375 13/16 0.812500 20.6375
0.21 5.3340 0.71 18.0340 21/64 0.328125 8.3344 53/64 0.828125 21.0344
0.22 5.5880 0.72 18.2880 11/32 0.343750 8.7312 27/32 0.843750 21.4312
0.23 5.8420 0.73 18.5420 23/64 0.359375 9.1281 55/64 0.859375 21.8281
0.24 6.0960 0.74 18.7960 3/8 0.375000 9.5250 7/8 0.875000 22.2250
0.25 6.3500 0.75 19.0500 25/64 0.390625 9.9219 57/64 0.890625 22.6219
0.26 6.6040 0.76 19.3040 13/32 0.406250 10.3188 29/32 0.906250 23.0188
0.27 6.8580 0.77 19.5580 27/64 0.421875 10.7156 59/64 0.921875 23.4156
0.28 7.1120 0.78 19.8120 7/16 0.430000 11.1125 15/16 0.937500 23.8125
0.29 7.3660 0.79 20.0660 29/64 0.453125 11.5094 61/64 0.953128 24.2094
0.30 7.6200 0.80 20.3200 15/32 0.468750 11.9062 31/32 0.968750 24.6062
0.31 7.8740 0.81 20.5740 31/64 0.484375 12.3031 63/64 0.984375 25.0031
0.32 8.1280 0.82 20.8280 1/2 0.500000 12.7000 1 1.000000 25.4000
0.33 8.3820 0.83 21.0820            
0.34 8.6360 0.84 21.3360            
0.35 8.8900 0.85 21.5900            
0.36 9.1440 0.86 21.8440            
0.37 9.3980 0.87 22.0980            
0.38 9.6520 0.88 22.3520            
0.39 9.9060 0.89 22.6060            
0.40 10.1600 0.90 22.8600            
0.41 10.4140 0.91 23.1140            
0.42 10.6680 0.92 23.3680            
0.43 10.9220 0.93 23.6220            
0.44 11.1760 0.94 23.8760            
0.45 11.4300 0.95 24.1300            
0.46 11.6840 0.96 24.3840            
0.47 11.9380 0.97 24.6380            
0.48 12.1920 0.98 24.8920            
0.49 12.4460 0.99 25.1460            
0.50 12.7000 1.00 25.4000            
For converting decimal-inches in “thousandths”, move decimal point in both columns to left.