Inches to Millimetres

Convert in to mm using the internationally-agreed conversion factor - the bridge between metric and Imperial marine units.

UnitsLength

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

x_{mm} = f(x_{in})

Symbol	Meaning	Unit
$in$	Value in in	in
$mm$	Value in mm	mm

Source: NIST SP 811 / ISO 80000

Convert in to mm using the internationally-agreed conversion factor \u2014 the bridge between metric and Imperial marine units.