ExactConverter

millimetres to inches

1 mm is 0.0394 in. Exact factor: in = mm ÷ 25.4.

Hardware, drill bits and camera lenses are specified in millimetres almost everywhere, including in the US.

Live converter

Edit either field — the other updates instantly. Type decimal values like 38.4.

Common values

Questions

How do you convert millimetres to inches?
Apply the formula in = mm ÷ 25.4. The converter above does it as you type, and every value below has its own page with the worked answer.
What is 1 mm in in?
1 mm is 0.0394 in.
Is this exact?
Hardware, drill bits and camera lenses are specified in millimetres almost everywhere, including in the US.

Every mm to in page — 172 values