Convert mm to inches
Enter the value to convert from millimeter to inch.
OR
63/64 inch
How to Convert Millimeter to Inch
Converting millimeter to inch is straightforward using our conversion calculator.
Conversion Formula
in = mm ÷ 25.4Reverse conversion: Convert inches to mm
Comparison: Millimeter vs Inch
When to Use Each Unit
Millimeter: Standard in engineering, manufacturing, medicine, and any field requiring precise measurements. Used for tolerances and small components.
Inch: Primary length unit in the United States for construction, manufacturing, and everyday measurements.
Common Conversion Values
- 1 mm = 0.1 cm
- 1 mm ≈ 0.0394 in
- 25.4 mm = 1 in
- 1000 mm = 1 m
About Millimeter
Definition: The millimeter (symbol: mm) is a unit of length equal to one thousandth of a meter. Used for precise measurements and small dimensions.
History: Developed alongside the metric system for measurements requiring higher precision than centimeters could provide.
Current Use: Standard in engineering, manufacturing, medicine, and any field requiring precise measurements. Used for tolerances and small components.
Examples: Paper thickness: 0.1mm, coin thickness: 1-3mm, drill bits: 1-20mm, rainfall: measured in mm
About Inch
Definition: The inch (symbol: in) is an imperial unit of length equal to 1/12 of a foot, approximately 2.54 centimeters.
History: Originally based on the width of a human thumb. Standardized in 1959 as exactly 25.4 millimeters internationally.
Current Use: Primary length unit in the United States for construction, manufacturing, and everyday measurements.
Examples: Screen sizes: 15-32 inches, screw sizes: 1/4-1 inch, lumber: 2×4 inches, pipe diameters: 1/2-12 inches