You are currently converting Distance and Length units from Inches to Millimeters

18 Inches (in)

=

457.2 Millimeters (mm)

Visit 18 Millimeters to Inches Conversion

Inches : An inch (symbol: in) is a unit of length. It is defined as 1⁄12 of a foot, also is 1⁄36 of a yard. Though traditional standards for the exact length of an inch have varied, it is equal to exactly 25.4 mm. The inch is a popularly used customary unit of length in the United States, Canada, and the United Kingdom.

Millimeters : The millimeter (SI symbol mm) is a unit of length in the metric system, equal to 1/1000 meter (or 1E-3 meter), which is also an engineering standard unit. 1 inch=25.4 mm.

Distance and Length Conversion Calculator

Convert From : in Convert To : mm Result :

18 Inch = 457.2 Millimeter

1 inch is equal to 25.4 millimeters:

1in = 25.4mm

The distance d in millimeters (mm) is equal to the distance d in inches (in) times 25.4, that conversion formula:

d(mm) = d(in) × 25.4

How many Millimeters in a Inch?

One Inch is equal to 25.4 Millimeters:

1in = 1in × 25.4 = 25.4mm

How many Inches in a Millimeter?

One Millimeter is equal to 0.03937 Inches:

1mm = 1mm × 0.03937 = 0.03937in

How to Convert 12 Inches to Millimeters?

d(mm) = 12(in) × 25.4 = 304.8mm

Convert from feet and inches to meter

Feet (ft) + Inch (in) = Meter (m)

Length conversion table

millimeter (mm) centimeter (cm) meter (m) kilometer (km) inch (in) foot / feet (ft) yard (yd) mile (mi) 1 millimeter (mm) 1 0.1 0.001 0.000001 0.03937 0.003281 0.0010936 0.0000006214 1 centimeter (cm) 10 1 0.01 0.00001 0.3937 0.03281 0.010936 0.000006214 1 meter (m) 1000 100 1 0.001 39.37 3.281 1.0936 0.0006214 1 kilometer (km) 1000000 100000 1000 1 39370 3281 1093.6 0.6214 1 inch (in) 25.4 2.54 0.0254 0.0000254 1 0.08333 0.02778 0.000015783 1 foot / feet (ft) 304.8 30.48 0.3048 0.0003048 12 1 0.33333 0.0001894 1 yard (yd) 914.4 91.44 0.9144 0.0009144 36 3 1 0.0005682 1 mile (mi) 1609344 160934 1609.3 1.6093 63360 5280 1760 1 1 nautical mile (nmi) 1852000 185200 1852 1.852 72913 6076 2025.4 1.1508

We decided to round some conversion factors to fit this table. Therefore, some of these values are not accurate, but they still have reasonable accuracy.

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