mm to fractional inch chart

Posted on 20260512 by Anthony P. Kuzub

Millimeters (mm)	Fractional Inch (Nearest 1/1024″)	Decimal Inches	Fractional Inch (Nearest 1/32″)	Precision Lost (%)
0	0	0.0000	0	0.00%
1	5/128″	0.0394	1/32″	20.62%
2	81/1024″	0.0787	3/32″	19.06%
3	121/1024″	0.1181	1/8″	5.83%
4	161/1024″	0.1575	5/32″	0.78%
5	101/512″	0.1969	3/16″	4.75%
6	121/512″	0.2362	1/4″	5.83%
7	141/512″	0.2756	9/32″	2.05%
8	323/1024″	0.3150	5/16″	0.78%
9	363/1024″	0.3543	11/32″	2.99%
10	403/1024″	0.3937	13/32″	3.19%
11	443/1024″	0.4331	7/16″	1.02%
12	121/256″	0.4724	15/32″	0.78%
13	131/256″	0.5118	1/2″	2.31%
14	141/256″	0.5512	9/16″	2.05%
15	605/1024″	0.5906	19/32″	0.54%
16	645/1024″	0.6299	5/8″	0.78%
17	685/1024″	0.6693	21/32″	1.95%
18	363/512″	0.7087	23/32″	1.42%
19	383/512″	0.7480	3/4″	0.26%
20	403/512″	0.7874	25/32″	0.78%
21	847/1024″	0.8268	13/16″	1.73%
22	887/1024″	0.8661	7/8″	1.02%
23	927/1024″	0.9055	29/32″	0.08%
24	121/128″	0.9449	15/16″	0.78%
25	63/64″	0.9843	31/32″	1.58%
26	1 3/128″	1.0236	1 1/32″	0.75%
27	1 65/1024″	1.0630	1 1/16″	0.05%
28	1 105/1024″	1.1024	1 3/32″	0.78%
29	1 145/1024″	1.1417	1 5/32″	1.27%
30	1 185/1024″	1.1811	1 3/16″	0.54%