Converter between millimeter and inch

type in measure + press Enter
conversion factor Result
Inch x 25.4 = Millimeter
Millimeter x 0.03937 = Inch

Conversion inch / mm

Inch, " Millimeter, mm No of threads per inch
UNC UN8 UNF
1/8 3,175 40 - 44
3/16 4,762 24 - 32
1/4 6,35 20 - 28
5/16 7,937 18 - 24
3/8 9,525 16 - 24
7/16 11,112 14 - 20
1/2 12,7 13 - 20
9/16 14,288 12 - 18
5/8 15,875 11 - 18
3/4 19,05 10 - 16
7/8 22,225 9 - 14
1 25,4 8 8 12 (14)
1 1/8 28,575 7 8 12
1 1/4 31,75 7 8 12
1 3/8 34,925 6 8 12
1 1/2 38,1 6 8 12
1 5/8 41,275 - 8 -
1 3/4 44,45 - 8 -
1 7/8 47,625 - 8 -
2 50,8 4,5 8 -
2 1/4 57,15 4,5 8 -
2 1/2 63,5 4 8 -
2 3/4 69,85 4 8 -
3 76,2 4 8 -
3 1/4 82,55 4 8 -
3 1/2 88,9 4 8 -
3 3/4 95,25 4 8 -
4 101,6 4 8 -