Millimeters to Inches Converter
Millimeters to Inches Converter
Millimeters to inches conversions come up constantly in engineering drawings, hardware specifications (bolt and screw sizes), and manufacturing tolerances, where the metric world uses millimeters and US-market parts are still specified in inches or fractions of an inch.
This tool isn't limited to mm and inches: use the "From" and "To" dropdowns to convert between any combination of millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
- Conversion factor: 1 millimeter = 0.0393701 inches (and 1 inch = exactly 25.4 millimeters, by international definition).
- Fully flexible: change either dropdown to convert between any two length units — not just millimeters and inches.
- Precision matters: for machining and hardware tolerances, use the full decimal result rather than rounding to a fraction unless your specification calls for it.
How many inches are in a millimeter?
1 millimeter equals approximately 0.03937 inches. To convert millimeters to inches, divide the millimeter value by 25.4.
Can I convert inches back to millimeters with this tool?
Yes — just swap the "From" and "To" selectors to Inches and Millimeters respectively; the same widget handles both directions and any other unit pair.
Millimeters to Inches Converter
Millimeters to inches conversions come up constantly in engineering drawings, hardware specifications (bolt and screw sizes), and manufacturing tolerances, where the metric world uses millimeters and US-market parts are still specified in inches or fractions of an inch.
This tool isn't limited to mm and inches: use the "From" and "To" dropdowns to convert between any combination of millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
- Conversion factor: 1 millimeter = 0.0393701 inches (and 1 inch = exactly 25.4 millimeters, by international definition).
- Fully flexible: change either dropdown to convert between any two length units — not just millimeters and inches.
- Precision matters: for machining and hardware tolerances, use the full decimal result rather than rounding to a fraction unless your specification calls for it.
How many inches are in a millimeter?
1 millimeter equals approximately 0.03937 inches. To convert millimeters to inches, divide the millimeter value by 25.4.
Can I convert inches back to millimeters with this tool?
Yes — just swap the "From" and "To" selectors to Inches and Millimeters respectively; the same widget handles both directions and any other unit pair.