Convert millimetre to inch
1 millimetre = 0.03937008 inches. Enter any value below for an exact conversion.
1 mm =
0.03937008 in
inches
Need the reverse? Convert inch to millimetre →
Formula
1 millimetre = 0.03937008 inches inch = millimetres × 0.03937008 millimetre = inches × 25.4
millimetre to inch conversion table
1 mm0.03937008 in
2 mm0.07874016 in
3 mm0.1181102 in
5 mm0.1968504 in
10 mm0.3937008 in
20 mm0.7874016 in
25 mm0.984252 in
50 mm1.968504 in
100 mm3.937008 in
1000 mm39.37008 in
About converting millimetres to inches
Millimetres to inches is a precision conversion for engineering, woodworking, jewellery, and hardware, where small metric dimensions must be read in inches. There are exactly 25.4 millimetres in an inch.
Frequently asked questions
How many inches are in a millimetre?
One millimetre equals 0.03937008 inches. So 10 millimetres is 0.3937008 inches. Use the converter above for any value.
What is the formula to convert millimetres to inches?
1 millimetre = 0.03937008 inches inch = millimetres × 0.03937008 millimetre = inches × 25.4
Is the millimetre-to-inch conversion exact?
Yes. The conversion factor between millimetres and inches is defined exactly, so results are precise — only rounded for display.