## Conversion formula

The conversion factor from inches to millimeters is 25.4, which means that 1 inch is equal to 25.4 millimeters:

1 in = 25.4 mm

To convert 0.5 inches into millimeters we have to multiply 0.5 by the conversion factor in order to get the length amount from inches to millimeters. We can also form a simple proportion to calculate the result:

1 in → 25.4 mm

0.5 in → L(mm)

Solve the above proportion to obtain the length L in millimeters:

L(mm) = 0.5 in × 25.4 mm

L(mm) = 12.7 mm

The final result is:

0.5 in → 12.7 mm

We conclude that 0.5 inches is equivalent to 12.7 millimeters:

0.5 inches = 12.7 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.078740157480315 × 0.5 inches.

Another way is saying that 0.5 inches is equal to 1 ÷ 0.078740157480315 millimeters.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that zero point five inches is approximately twelve point seven millimeters:

0.5 in ≅ 12.7 mm

An alternative is also that one millimeter is approximately zero point zero seven nine times zero point five inches.

## Conversion table

### inches to millimeters chart

For quick reference purposes, below is the conversion table you can use to convert from inches to millimeters

inches (in) millimeters (mm)
1.5 inches 38.1 millimeters
2.5 inches 63.5 millimeters
3.5 inches 88.9 millimeters
4.5 inches 114.3 millimeters
5.5 inches 139.7 millimeters
6.5 inches 165.1 millimeters
7.5 inches 190.5 millimeters
8.5 inches 215.9 millimeters
9.5 inches 241.3 millimeters
10.5 inches 266.7 millimeters