“Millimeter” or “Millimetre”—What's the difference?

Usage by country

Where each spelling is used

Of the 12 countries below, 11 prefer “millimeter” and 0 prefer “millimetre”. Usage levels are out of 100; the more common spelling in each country is in bold.

Usage level out of 100 (if available).
Country	millimeter	millimetre	Preference
United States	100	0	“millimeter”
United Kingdom	67	33	“millimeter”
India	53	47	“millimeter”
Philippines	99	1	“millimeter”
Canada	77	23	“millimeter”
Australia	65	35	“millimeter”
Liberia	0	0	Not enough data
Ireland	71	29	“millimeter”
New Zealand	74	26	“millimeter”
Jamaica	92	8	“millimeter”
Trinidad & Tobago	100	0	“millimeter”
Guyana	100	0	“millimeter”

Usage

Examples in context

Real sentences for each spelling. Hover an example to copy it.

“millimeter”

…Seahawk, and 76 and 25 millimeter gunfire, 40 millimeter grenades, and…
…rounded up to the nearest millimeter).
…flower is made up of millimeter long sepals and occasionally a…
…800,000 chloroplasts for every square millimeter of leaf.
…cm thickness, finally to one millimeter thin sheet rolls which are…
…an area of one square millimeter.
…to explore the universe at millimeter wavelengths, with interests going from…
Atacama Large Millimeter Array
…flowers on 3-12 by 1-1.5 millimeter peduncles that grow on thick…
…mortar is an American 81 millimeter caliber mortar.

“millimetre”

…measuring only millionths of a millimetre have become indispensable in many
…by one quarter of a millimetre to .
…and for interferometric observations at millimetre wavelengths.
…uses are mostly in the millimetre band, where modern test apparatus…
The larvae are about one millimetre long when they first hatch.
…a diameter of about a millimetre, and up to nine centimetres
The ribbon is 32 millimetres wide and orange, with two…
…yard (or thousandths of a millimetre).
…also a minute crab a millimetre or so wide which is…
…about three to four per millimetre.

Examples are Wikipedia snippets under the CC ShareAlike 3.0 license.

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