⚡ Free unit & currency converter — 150+ unit types & live FX rates  |  Email: support@cvrt.pages.dev
All Length Weight Temperature Area Speed Volume Data Time Currency

Inches to Millimeters

1 in = 25.4 mm — instant, accurate and free.

1 in = 25.4 mm
Inches (in)
Millimeters (mm)
Result
mm
InchesMillimeters
1 in25.4 mm
2 in50.8 mm
5 in127 mm
10 in254 mm
25 in635 mm
50 in1270 mm
100 in2540 mm
500 in12700 mm
1000 in25400 mm

How to Convert Inches to Millimeters

1 in = 25.4 mm

To convert from inches to millimeters, use the formula above. Multiply your value in inches by the conversion factor to get the result in millimeters.

About Inches

The inche (in) is a standard unit of length measurement used in scientific and everyday contexts worldwide.

About Millimeters

The millimeter (mm) is widely used in science and international contexts.

Frequently Asked Questions

QHow many millimeters in 1 inche?
1 inche equals 25.4 millimeters.
QHow do I convert inches to millimeters?
Use the formula: 1 in = 25.4 mm. Or simply enter your value in the converter above for an instant, accurate result.
QIs this converter accurate?
Yes. CVRT uses precise conversion factors based on international standards (SI units). Results are accurate to 8 significant figures.
QCan I convert millimeters back to inches?
Yes — click the swap button (⇄) or visit the Millimeters to Inches converter page.