Metric Conversion Table

Read from left to right – pick your fraction , decimal or mm measurement.

Example: convert 1/64″ to mm. Find 1/64 and read to the right under mm. You will see 0.397 under the mm column.

Fraction	Inches	mm
-
-	0.0010	0.025
-	0.0039	0.100
-	0.0100	0.254
1/64	0.0156	0.397
-	0.0197	0.500
1/32	0.0313	0.794
-	0.0394	1.000
3/64	0.0469	1.191
1/16	0.0625	1.588
5/64	0.0781	1.984
-	0.0787	2.000
3/32	0.0938	2.381
-	0.1000	2.540
7/64	0.1094	2.778
-	0.1181	3.000
1/8	0.1250	3.175
9/64	0.1406	3.572
5/32	0.1563	3.969
-	0.1575	4.000
11/64	0.1719	4.366
3/16	0.1875	4.763
-	0.1969	5.0000
13/64	0.2031	5.159
7/32	0.2188	5.556
15/64	0.2344	5.953
-	0.2362	6.000
1/4	0.2500	6.350
17/64	0.2656	6.747
-	0.2756	7.000
9/32	0.2813	7.144
19/64	0.2969	7.541
5/16	0.3125	7.938
-	0.3150	8.000

Fraction	Inches	mm
21/64	0.3281	8.334
11/32	0.3438	8.731
-	0.3543	9.000
23/64	0.3594	9.128
3/8	0.3750	9.525
25/64	0.3906	9.922
-	0.3937	10.000
13/32	0.4063	10.319
27/64	0.4219	10.716
-	0.4331	11.000
7/16	0.4375	11.113
29/64	0.4531	11.509
15/32	0.4688	11.906
-	0.4724	12.000
31/64	0.4844	12.303
1/2	0.5000	12.700
-	0.5118	13.000
33/64	0.5156	13.097
17/32	0.5313	13.494
35/64	0.5469	13.891
-	0.5512	14.000
9/16	0.5625	14.288
37/64	0.5781	14.684
-	0.5906	15.000
19/32	0.5938	15.081
-	0.6000	15.240
39/64	0.6094	15.478
5/8	0.6250	15.875
-	0.6299	16.000
41/64	0.6406	16.272
21/32	0.6563	16.669
-	0.6693	17.000
43/64	0.6719	17.066
11/16	0.6875	17.463

Fraction	Inches	mm
-	0.7000	17.780
45/64	0.7031	17.859
-	0.7087	18.000
23/32	0.7188	18.258
47/64	0.7344	18.653
-	0.7480	19.000
3/4	0.7500	19.050
49/64	0.7656	19.447
25/32	0.7813	19.844
-	0.7874	20.000
51/64	0.7969	20.241
-	0.8000	20.320
13/16	0.8125	20.638
-	0.8268	21.000
53/64	0.8281	21.034
27/32	0.8438	21.431
55/64	0.8594	21.828
-	0.8661	22.000
7/8	0.8750	22.225
57/64	0.8906	22.622
-	0.9000	22.860
-	0.9055	23.000
29/32	0.9063	22.019
59/64	0.9219	23.416
15/16	0.9375	23.813
-	0.9449	24.000
61/64	0.9531	24.209
31/32	0.9688	24.606
-	0.9843	25.000
63/64	0.9844	25.003
1	1.000	25.40