MM to Inches Converter

Convert millimeters to decimal inches, fractions, or feet and inches. Rounded results show their precision and measurement difference.

Select Conversion Type

Enter millimeters

RESULTS

Decimal Inches

≈ 0.9843″

Rounded to 4 decimal places

Fractional Inches

≈ 63/64″

Approximate — nearest 1/64 inch

Feet + Inches

≈ 0 ft 63/64 in

Inches rounded to nearest 1/64 inch

63/64 inch equals 25.0031 mm, which is 0.0031 mm above the original 25 mm.

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MM to Inches Chart

Every millimeter from 1 to 300 mm in decimal inches, with exact whole inches highlighted. One page; small print.

⬇️ Download PDF View chart →

Inches to MM Chart

Every 1/16″ from 0 to 12 inches — fractions, decimals and mm.

⬇️ Download PDF View chart →

Millimeters to Inches Conversion Table

Select a linked millimeter value to visit its detailed conversion page.

Millimeters (mm)	Inches (decimal, rounded to 4 places)	Inches (fraction, nearest 1/64″)
0.5 mm	0.0197″	1/64″
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″
15 mm	0.5906″	19/32″
20 mm	0.7874″	25/32″
25 mm	0.9843″	63/64″
30 mm	1.1811″	1 3/16″
40 mm	1.5748″	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″
150 mm	5.9055″	5 29/32″
200 mm	7.8740″	7 7/8″
250 mm	9.8425″	9 27/32″
300 mm	11.8110″	11 13/16″

How to Convert MM to Inches

To convert millimeters to inches, divide the millimeter value by 25.4. This is because one inch equals exactly 25.4 millimeters — a definition standardized internationally in 1959.

Formula: Inches = Millimeters ÷ 25.4

Example

Convert 25 mm to inches: 25 ÷ 25.4 ≈ 0.9843 inches (rounded to 4 decimal places; about 1 inch)

Why Convert?

Converting mm to inches is essential for woodworking, engineering, manufacturing, hardware, and any project working with materials from countries using different measurement systems.