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Millimeters to Inches (mm to in)
1 millimeter = 0.0394 in. Type any number below, or pick a value from the chart.
Quick Reference
Formula
in = mm ÷ 25.4
Example: 10 ÷ 25.4 = 0.3937
The other way round
1 inch = 25.4 mm
Millimeters to Inches (mm to in) chart
Tap a value for the worked answer.
More length conversions
About the Unit Converter
The unit converter changes values between metric and imperial units for length, weight, temperature, digital data, area, and volume.
How to use it
- 1 Choose a category, such as length or temperature.
- 2 Pick the unit to convert from and the unit to convert to.
- 3 Type a value to see the converted result straight away.
Frequently asked questions
How do I convert millimeters to inches?
Divide by 25.4: one inch is 25.4 millimeters.
What is 1 millimeter in inches?
1 millimeter is 0.0394 inches.
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32. For example, 20 °C × 9/5 + 32 = 68 °F.
How many centimetres are in an inch?
One inch is exactly 2.54 centimetres, and one foot is 30.48 centimetres.
Is a kilobyte 1,000 or 1,024 bytes?
In SI units a kilobyte (kB) is 1,000 bytes. A kibibyte (KiB) is 1,024 bytes. Some operating systems still use "KB" to mean 1,024 bytes.