Millimeters to Inches Converter
Convert metric mm to decimal inches and fractional inches (e.g. 1/16) for carpentry.
Precision Measurements
Machinists and engineers often work in millimeters due to their precision. However, American carpenters and contractors use inches, usually broken down into fractions like 1/8 or 1/16.
The Math
Because there are exactly 25.4 millimeters in an inch, you divide mm by 25.4 to get decimal inches. This calculator then automatically rounds that to the nearest 1/16th of an inch for tape measure use.
Disclaimer: This calculator is for educational and learning purposes only. While we strive for accuracy, calculations are provided "as-is" without warranty. The accuracy of results depends on the accuracy of input data provided. Always verify important calculations independently. For critical applications or when accuracy is essential, consult with appropriate professionals or use verified reference sources. Educational calculators may contain rounding or approximations.