Inches to MM - Fast inches to millimeters converter
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Free, instant inches to millimeters conversion with the 25.4 formula, common printable charts, and decimal or fraction inch use cases for students, makers, engineers, and DIY users.
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Hunter
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I built Inches to MM as a focused free converter for students, makers, engineers, and DIY users who need quick inch-to-millimeter answers, the formula, and common chart references. Feedback on missing chart ranges or workshop/education use cases is welcome.
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Super clean little tool, popped in a fraction and got the mm answer instantly. Love that the 25.4 formula is right there for trust.
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Simple and actually useful, the 25.4 formula feels right and the printable charts save me a trip to the workshop binder.
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The inclusion of both decimal and fraction inch cases right on the page is a really thoughtful touch, especially for students who are still learning when to reach for which format.
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How does it handle fractional inch inputs like 3/8 or 7/16, does it round to a set number of decimal places or show the exact converted value?
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Does the fraction mode support values like 5/32 or only the more common 1/8, 1/16, 1/32 steps, and is there a way to flip between the two quickly while working through a cut list?
Replies
Super clean little tool, popped in a fraction and got the mm answer instantly. Love that the 25.4 formula is right there for trust.
Simple and actually useful, the 25.4 formula feels right and the printable charts save me a trip to the workshop binder.
The inclusion of both decimal and fraction inch cases right on the page is a really thoughtful touch, especially for students who are still learning when to reach for which format.
How does it handle fractional inch inputs like 3/8 or 7/16, does it round to a set number of decimal places or show the exact converted value?
Does the fraction mode support values like 5/32 or only the more common 1/8, 1/16, 1/32 steps, and is there a way to flip between the two quickly while working through a cut list?