Inches to Millimeters Converter
Convert inches to millimeters or millimeters to inches instantly. Enter any decimal measurement and get the conversion online.
Inches and millimeters converter
Inches and Millimeters
1 inch = 25.4 millimeters exactly. mm = inches × 25.4; inches = mm ÷ 25.4.
Useful for measurements, tools and hardware, engineering, manufacturing and product dimensions.
Examples
1 inch = 25.4 mm, 0.5 inch = 12.7 mm, 2 inches = 50.8 mm, and 10 inches = 254 mm.
What can you use this converter for?
Convert measurements for tools and hardware, engineering, manufacturing and product dimensions.
How to use the Inches to Millimeters Converter
- Enter inches or millimeters.
- The other measurement updates immediately.
Frequently asked questions
Multiply inches by 25.4 to convert them to millimeters.
There are exactly 25.4 millimeters in 1 inch.
Yes. 1 inch equals exactly 25.4 millimeters.
Divide millimeters by 25.4 to convert them to inches.
Half an inch is 12.7 millimeters.
Yes. Enter any non-negative decimal inch value.