Millimeters To Inches Calculator Guide
The Metric Divide
The world uses Metric (mm), but the US construction industry uses Imperial (Inches). Translating between them is a daily task for engineers and builders working with imported materials.
The Magic Number
1 Inch = 25.4 Millimeters
To go from mm to inches: Divide by 25.4
To go from inches to mm: Multiply by 25.4
Cheat Sheet
Small Scale
- 1/8 inch: ~3 mm
- 1/4 inch: ~6 mm
- 1/2 inch: ~13 mm
- 3/4 inch: ~19 mm
Large Scale
- 1 inch: 25.4 mm
- 4 inches: ~100 mm
- 12 inches (1 foot): 304.8 mm
- 1 meter: 39.37 inches