# Millimeters to Inches conversion

Enter the length in millimeters (mm) and press the Convert button:

 Enter millimeters: mm Inches decimal result: ″ Inches fraction result(*): ″ Feet+inches result: ″ Calculation:

* The fraction result is calculated by rounding the decimal inches to the closest 1/64 fraction.

Inches to mm ►

## How to convert millimeters to inches

1 millimeter is equal to 0.03937007874 inches:

1mm = (1/25.4)″ = 0.03937007874″

The distance d in inches (″) is equal to the distance d in millimeters (mm) divided by 25.4:

d(″) = d(mm) / 25.4

#### Example

Convert 20 mm to inches:

d(″) = 20mm / 25.4 = 0.7874″

## Millimeters to inches conversion table

The fraction inches are rounded to 1/64 resolution.

Millimeters (mm) Inches (")
(decimal)
Inches (")
(fraction)
0.01 mm 0.0004 ″ 0 ″
0.1 mm 0.0039 ″ 0 ″
1 mm 0.0394 ″ 3/64 ″
2 mm 0.0787 ″ 5/64 ″
3 mm 0.1181 ″ 1/8 ″
4 mm 0.1575 ″ 5/32 ″
5 mm 0.1969 ″ 13/64 ″
6 mm 0.2362 ″ 15/64 ″
7 mm 0.2756 ″ 9/32 ″
8 mm 0.3150 ″ 5/16 ″
9 mm 0.3543 ″ 23/64 ″
10 mm 0.3937 ″ 25/64 ″
20 mm 0.7874 ″ 25/32 ″
30 mm 1.1811 ″ 1 3/16 ″
40 mm 1.5784 ″ 1 37/64 ″
50 mm 1.9685 ″ 1 31/32 ″
60 mm 2.3622 ″ 2 23/64 ″
70 mm 2.7559 ″ 2 3/4 ″
80 mm 3.1496 ″ 3 5/32 ″
90 mm 3.5433 ″ 3 35/64 ″
100 mm 3.9370 ″ 3 15/16 ″

Inches to mm ►