1 Inch to Millimeters

1 in = 25.4 mm

1 inch equals 25.4 millimeters (1 in = 25.4 mm).

How to convert 1 inches to millimeters

mm = in × 25.4
  1. 1Start with the value in inches: 1 in.
  2. 2Multiply by the conversion factor 25.4.
  3. 31 × 25.4 = 25.4 mm.

1 inches in other length units

The same quantity expressed in the other units this converter supports.

1 in to m0.0254 m
1 in to km0.000025 km
1 in to cm2.54 cm
1 in to mi0.000016 mi
1 in to yd0.027778 yd
1 in to ft0.083333 ft

Inch to Millimeter conversion table

Inch (in)Millimeter (mm)
125.4
250.8
376.2
4101.6
5127
6152.4
8203.2
10254
12304.8
15381
20508
25635
30762
401,016
501,270
751,905
1002,540
1503,810
2005,080
50012,700
100025,400

Frequently asked questions

What is 1 inches in millimeters?

1 inches equals 25.4 millimeters (1 in = 25.4 mm).

How do you convert 1 inches to millimeters?

Start with the value in inches: 1 in. Multiply by the conversion factor 25.4. 1 × 25.4 = 25.4 mm.