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Inches to millimeters (in to mm) Metric conversion calculator

Welcome to our inches to millimeters (in to mm) conversion calculator. You can enter a value in either the inches or millimeters input fields. For an understanding of the conversion process, we include step by step and direct conversion formulas. If you'd like to perform a different conversion, just select between the listed Length units in the 'Select between other Length units' tab below or use the search bar above. Tip: Use the swap button to switch from converting inches to millimeters to millimeters to inches.

inches (in)

millimeters (mm)

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1 in = 25.4 mm1 mm = 0.03937008 in

Algebraic Steps / Dimensional Analysis Formula
in *2.54 cm
1 in
*10 mm
1 cm
= mm

Direct Conversion Formula
in *25.4 mm
1 in
= mm

centimeters 0
feet 0
inches 0
kilometers 0
light-years 0
meters 0
miles 0
nautical miles 0
yards 0
If you would like to switch between Length units, select from the tables below

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