Millimeters to Inches Converter
Convert small lengths between mm and inches.
Millimeters25,4 mm
Inches1 in
Formula: in = mm × 0.0393700787; mm = in / 0.0393700787.
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How is this result calculated?
The conversion uses the fixed factor 0.0393700787. To convert the other way, apply the inverse operation.
Formula: in = mm × 0.0393700787; mm = in / 0.0393700787.
millimeters and inches express the same quantity in two different unit systems. Use the left field to start from millimeters, or the right field to run the inverse calculation from inches.
25.4 mm is exactly 1 inch.
Frequently asked questions
How do I convert millimeters to inches?+
Multiply the value by 0.0393700787.
How do I convert inches to millimeters?+
Divide the value by 0.0393700787.
Is conversion instant?+
Yes, you can type in either field and the other side updates immediately.
Conversion example+
25.4 mm is exactly 1 inch.