Convert 1 1/8 Inches to MM - Accurate Calculator
Convert 1 1/8" to millimeters with high precision
Results at Different Precisions
🔧 DIY & Hardware
For hardware and DIY projects, 1 1/8" equals 28.58 mm, which is essential when working with metric tools or international specifications.
⚙️ Engineering & Manufacturing
In engineering contexts, 1 1/8" converts to 28.575000 mm with high precision for accurate technical specifications.
Frequently Asked Questions
How do I convert 1 1/8" to mm?
To convert 1 1/8 inches to millimeters, multiply by 25.4 (the exact conversion factor). The result is 28.58 mm.
What is the formula for inches to mm?
The formula is: millimeters = inches × 25.4. This uses the international standard where 1 inch equals exactly 25.4 millimeters.
Is this conversion accurate for technical drawings?
Yes, our conversion uses the exact standard conversion factor and supports up to 6 decimal places for technical and engineering applications.
Need to Convert Different Values?
Use our interactive converter tool to convert any value between inches and millimeters with real-time results.
Go to Interactive Converter