Metric to SAE Calculator

Forget wrong wrenches and keys: our metric to SAE calculator will make your life easier!

Clear
Result0.03937 in1 mm converted
1 mm equals0.03937 in
1 in equals25.4 mm

Millimeter to inch reference

millimeterinch
1 mm0.03937 in
2 mm0.07874 in
5 mm0.19685 in
10 mm0.393701 in
25 mm0.984252 in
50 mm1.9685 in
100 mm3.937 in
500 mm19.685 in
1,000 mm39.3701 in

How to convert millimeter to inch

One millimeter equals 0.03937007874 in, so multiply the number of millimeters by 0.03937007874:

in = mm × 0.03937007874

Going the other way

One inch equals 25.4 mm, so to convert back:

mm = in × 25.4

Both directions are shown in the results above, and the drop-downs let you convert between any pair of length units — not just these two.