Inches to Millimeters Converter
Convert Inches (in) to Millimeters (mm).
About Inches to Millimeters Converter
The Inches to Millimeters converter is a precision tool essential for engineering, manufacturing, technical drawing, and any field requiring accurate metric measurements. Millimeters are the preferred unit for technical specifications, mechanical engineering, and precision work because they eliminate decimal points for most common measurements. This converter is crucial for machinists reading US imperial blueprints, engineers working on international projects, and professionals needing exact conversions for CAD work.
Formula
Examples
Reference
- • 1 inch = 25.4 millimeters (exactly)
- • 1 millimeter = 0.0393701 inches
- • Preferred unit for technical specifications
- • 10 millimeters = 1 centimeter
Frequency Asked Questions
Why use millimeters instead of centimeters?
Millimeters avoid decimal points for most measurements (25mm instead of 2.5cm), making them clearer for technical work and reducing errors.
Is the inches to millimeters conversion exact?
Yes, 1 inch is defined as exactly 25.4 millimeters. This is an internationally recognized standard, ensuring precise conversions.
What industries primarily use millimeters?
Engineering, manufacturing, machining, automotive, aerospace, construction, and 3D printing commonly use millimeters for technical specifications.
Can I use millimeters in CAD software?
Yes, all professional CAD software supports millimeters as a unit. Many engineers prefer working in millimeters for international compatibility.