How do I convert millimeters to inches?

Type “20 mm in inches” — Jotal reads it as written and answers 0.787402 in.

Calculators › millimeters to inches

Convert millimeters to inches

1 millimeter = 0.03937 in

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Millimeters to inches table

Millimeters	Inches
1 mm	0.03937 in
2 mm	0.07874 in
3 mm	0.11811 in
5 mm	0.19685 in
10 mm	0.393701 in
15 mm	0.590551 in
20 mm	0.787402 in
25 mm	0.984252 in
30 mm	1.1811 in
50 mm	1.9685 in
75 mm	2.9528 in
100 mm	3.937 in

Doing it without a converter

Most converters make you fill in two boxes. Jotal lets you write the calculation the way you'd say it — 20 mm in inches — and keep going on the next line. Units carry through your working, so you can write 20 mm in inches + 5 in or total a column of mixed units and get a sensible answer.

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Free, works offline, nothing to install and no account. Alongside unit conversion it handles currencies at live rates, percentages, dates, time zones, variables and running totals — written in plain language, with the answers down the right-hand side.

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