mm to inch converter

// Convert millimeters to inches instantly. Free length converter for engineering, manufacturing, and international measurements. Accurate and precise.

Converter
How It Works

The MM to Inch Converter instantly converts measurements from millimeters to inches. This tool is essential for engineering projects, manufacturing, construction, international measurements, and any situation requiring conversion between metric and imperial length units. Simply enter the measurement in millimeters, and the calculator provides the equivalent in inches. One inch equals exactly 25.4 millimeters, making this conversion precise and reliable.

Conversion Formula
Inches = Millimeters ÷ 25.4

Divide the number of millimeters by 25.4 to convert to inches. This conversion factor is exact, as one inch is defined as exactly 25.4 millimeters in the international standard.

Example Conversions
Input:25.4 mm
Output:1 inch

25.4 ÷ 25.4 = 1 inch

Input:50.8 mm
Output:2 inches

50.8 ÷ 25.4 = 2 inches

Input:100 mm
Output:3.94 inches

100 ÷ 25.4 = 3.94 inches

Frequently Asked Questions