INCHES TO MILLIMETERS CONVERTER

Inches to millimeters

Enter inches, get millimeters — or swap for mm to inches.

Value

in

From

To

Inches to millimeters chart

Inches (in)	Millimeters (mm)
0.063 in	1.587 mm
0.125 in	3.175 mm
0.188 in	4.762 mm
0.25 in	6.35 mm
0.313 in	7.938 mm
0.375 in	9.525 mm
0.5 in	12.7 mm
0.625 in	15.875 mm
0.75 in	19.05 mm
0.875 in	22.225 mm
1 in	25.4 mm
1.25 in	31.75 mm
1.5 in	38.1 mm
2 in	50.8 mm
3 in	76.2 mm
4 in	101.6 mm
6 in	152.4 mm
12 in	304.8 mm

Millimeters to inches chart

Millimeters (mm)	Inches (in)
1 mm	0.039 in
2 mm	0.079 in
3 mm	0.118 in
4 mm	0.157 in
5 mm	0.197 in
6 mm	0.236 in
8 mm	0.315 in
10 mm	0.394 in
12 mm	0.472 in
15 mm	0.591 in
20 mm	0.787 in
25 mm	0.984 in
25.4 mm	1 in
30 mm	1.181 in
40 mm	1.575 in
50 mm	1.969 in
75 mm	2.953 in
100 mm	3.937 in

How many mm is an inch?

Exactly 25.4 mm, by definition since 1959.

How many mm is 1/2 inch?

12.7 mm. 1/4 inch is 6.35 mm and 3/4 inch is 19.05 mm.

How many mm is 1/8 inch?

3.175 mm; 1/16 inch is 1.5875 mm.

Can I enter a fraction like 3/8?

Enter it as a decimal: 3/8 = 0.375 inch, which is 9.525 mm. The chart lists common fractions.

What wrench size is close to 1/2 inch?

13 mm is 0.512 inch, the nearest metric size to 1/2 inch (12.7 mm).