# mm to inches Conversion Factor

The mm to inch conversion factor is 0.039370078740157

To find how many millimeters are there in a inch, just multiply the quantity in millimeters by 0.

You can also use the formula to convert from mm to inches below:

Value in inches = value in millimeters × 0.039370078740157

## Examples:

Convert half mm to inches:
half millimeters = 0.5 × 0.0394 = 0.0197 inches.

Convert a mm to inches:
a mm = 1 × 0.0394 = 0.0394 inches.

Convert two mm to inches:
two millimeters = 2 × 0.0394 = 0.0787 inches.

Note: All values are rounded to 3 significant figures.

## More Examples:

Convert three mm to inches three millimeters = 3 × 0.118 = 0.118 inches.

Convert 4 mm to inches 4 millimeters = 4 × 0.157 = 0.157 inches.

Convert half mm to inches half millimeters = 0.5 × 0.0197 = 0.0197 inches.

Convert a quater mm to inches a quater millimeters = 0.25 × 0.00984 = 0.00984 inches.

Convert a fifth mm to inches a fifth millimeters = 0.2 × 0.00787 = 0.00787 inches.

Convert a eighth mm to inches a eighth millimeters = 0.125 × 0.00492 = 0.00492 inches.

Note: All values are rounded to 3 significant figures.

## Definition of Millimeter

A millimeter (mm) (mispeled millimeter) is a decimal fraction of the meter, the International System of Units (SI) unit of length, approximately equivalent to 39.37 inches.

## Definition of Inch

An inch is a unit of length or distance in a number of systems of measurement, including in the US Customary Units and British Imperial Units. One inch is defined as 1⁄12 of a foot and is therefore 1⁄36 of a yard. According to the modern definition, one inch is equal to 25.4 mm exactly.