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Imperial (Inches) to Metric (mm) Conversion Tables
Imperial Imperial Metric Imperial Imperial Metric Imperial Imperial Metric
Value Value Equivalent Value Value Equivalent Value Value Equivalent
(Decimal (Fractional (In mm) (Decimal) (Fractional (In mm) (Decimal) (Fractional (In mm)
Inches) Inches) Inches) Inches) Inches) Inches)

Up To 1"

Up To 2"

Up To 3"
0.0156 1/64 0.3969 1.0156 1-1/64 25.7969 2.0156 2-1/64 51.1970
0.0313 1/32 0.7938 1.0313 1-1/32 26.1938 2.0313 2-1/32 51.5939
0.0469 3/64 1.1906 1.0469 1-3/64 26.5907 2.0469 2-3/64 51.9907
0.0625 1/16 1.5875 1.0625 1-1/16 26.9876 2.0625 2-1/16 52.3876
0.0781 5/64 1.9844 1.0781 1-5/64 27.3844 2.0781 2-5/64 52.7845
0.0938 3/32 2.3813 1.0938 1-3/32 27.7813 2.0938 2-3/32 53.1814
0.1094 7/64 2.7781 1.1094 1-7/64 28.1782 2.1094 2-7/64 53.5782
0.1250 1/8 3.1750 1.1250 1-1/8 28.5751 2.1250 2-1/8 53.9751
0.1406 9/64 3.5719 1.1406 1-9/64 28.9719 2.1406 2-9/64 54.3720
0.1563 5/32 3.9688 1.1563 1-5/32 29.3688 2.1563 2-5/32 54.7689
0.1719 11/64 4.3656 1.1719 1-11/64 29.7657 2.1719 2-11/64 55.1657
0.1875 3/16 4.7625 1.1875 1-3/16 30.1626 2.1875 2-3/16 55.5626
0.2031 13/64 5.1594 1.2031 1-13/64 30.5594 2.2031 2-13/64 55.9595
0.2188 7/32 5.5563 1.2188 1-7/32 30.9563 2.2188 2-7/32 56.3564
0.2344 15/64 5.9531 1.2344 1-15/64 31.3532 2.2344 2-15/64 56.7532
0.2500 1/4 6.3500 1.2500 1-1/4 31.7501 2.2500 2-1/4 57.1501
0.2656 17/64 6.7469 1.2656 1-17/64 32.1469 2.2656 2-17/64 57.5470
0.2813 9/32 7.1438 1.2813 1-9/32 32.5438 2.2813 2-9/32 57.9439
0.2969 19/64 7.5406 1.2969 1-19/64 32.9407 2.2969 2-19/64 58.3407
0.3125 5/16 7.9375 1.3125 1-5/16 33.3376 2.3125 2-5/16 58.7376
0.3281 21/64 8.3344 1.3281 1-21/64 33.7344 2.3281 2-21/64 59.1345
0.3438 11/32 8.7313 1.3438 1-11/32 34.1313 2.3438 2-11/32 59.5314
0.3594 23/64 9.1281 1.3594 1-23/64 34.5282 2.3594 2-23/64 59.9282
0.3750 3/8 9.5250 1.3750 1-3/8 34.9251 2.3750 2-3/8 60.3251
0.3906 25/64 9.9219 1.3906 1-25/64 35.3219 2.3906 2-25/64 60.7220
0.4063 13/32 10.3188 1.4063 1-13/32 35.7188 2.4063 2-13/32 61.1189
0.4219 27/64 10.7156 1.4219 1-27/64 36.1157 2.4219 2-27/64 61.5157
0.4375 7/16 11.1125 1.4375 1-7/16 36.5126 2.4375 2-7/16 61.9126
0.4531 29/64 11.5094 1.4531 1-29/64 36.9094 2.4531 2/29/1964 62.3095
0.4688 15/32 11.9063 1.4688 1-15/32 37.3063 2.4688 2-15/32 62.7064
0.4844 31/64 12.3031 1.4844 1-31/64 37.7032 2.4844 2-31/64 63.1033
0.5000 1/2 12.7000 1.5000 1-1/2 38.1001 2.5000 2-1/2 63.5001
0.5156 33/64 13.0969 1.5156 1-33/64 38.4970 2.5156 2-33/64 63.8970
0.5313 17/32 13.4938 1.5313 1-17/32 38.8938 2.5313 2-17/32 64.2939
0.5469 35/64 13.8907 1.5469 1-35/64 39.2907 2.5469 2-35/64 64.6908
0.5625 9/16 14.2875 1.5625 1-9/16 39.6876 2.5625 2-9/16 65.0876
0.5781 37/64 14.6844 1.5781 1-37/64 40.0845 2.5781 2-37/64 65.4845
0.5938 19/32 15.0813 1.5938 1-19/32 40.4813 2.5938 2-19/32 65.8814
0.6094 39/64 15.4782 1.6094 1-39/64 40.8782 2.6094 2-39/64 66.2783
0.6250 5/8 15.8750 1.6250 1-5/8 41.2751 2.6250 2-5/8 66.6751
0.6406 41/64 16.2719 1.6406 1-41/64 41.6720 2.6406 2-41/64 67.0720
0.6563 21/32 16.6688 1.6563 1-21/32 42.0688 2.6563 2-21/32 67.4689
0.6719 43/64 17.0657 1.6719 1-43/64 42.4657 2.6719 2-43/64 67.8658
0.6875 11/16 17.4625 1.6875 1-11/16 42.8626 2.6875 2-11/16 68.2626
0.7031 45/64 17.8594 1.7031 1-45/64 43.2595 2.7031 2-45/64 68.6595
0.7188 23/32 18.2563 1.7188 1-23/32 43.6563 2.7188 2-23/32 69.0564
0.7344 47/64 18.6532 1.7344 1-47/64 44.0532 2.7344 2-47/64 69.4533
0.7500 3/4 19.0500 1.7500 1-3/4 44.4501 2.7500 2-3/4 69.8501
0.7656 49/64 19.4469 1.7656 1-49/64 44.8470 2.7656 2-49/64 70.2470
0.7813 25/32 19.8438 1.7813 1-25/32 45.2438 2.7813 2-25/32 70.6439
0.7969 51/64 20.2407 1.7969 1-51/64 45.6407 2.7969 2-51/64 71.0408
0.8125 13/16 20.6375 1.8125 1-13/16 46.0376 2.8125 2-13/16 71.4376
0.8281 53/64 21.0344 1.8281 1-53/64 46.4345 2.8281 2-53/64 71.8345
0.8438 27/32 21.4313 1.8438 1-27/32 46.8313 2.8438 2-27/32 72.2314
0.8594 55/64 21.8282 1.8594 1-55/64 47.2282 2.8594 2-55/64