“Millimeter” or “Millimetre”

Language

Millimeter and millimetre are both English terms.

Usage

Millimeter is predominantly used in 🇺🇸 American (US) English (en-US) while millimetre is predominantly used in 🇬🇧 British English (used in UK/AU/NZ) (en-GB).

In terms of actual appearance and usage, here's a breakdown by country, with usage level out of 100 (if available):

Term	US	UK	India	Philippines	Canada	Australia	Liberia	Ireland	New Zealand	Jamaica	Trinidad & Tobago	Guyana
millimeter	100	67	53	99	77	65	0	71	74	92	100	100
millimetre	0	33	47	1	23	35	0	29	26	8	0	0

• In the United States, there is a preference for "millimeter" over "millimetre" (100 to 0).
• In the United Kingdom, there is a preference for "millimeter" over "millimetre" (67 to 33).
• In India, there is a preference for "millimeter" over "millimetre" (53 to 47).
• In the Philippines, there is a preference for "millimeter" over "millimetre" (99 to 1).
• In Canada, there is a preference for "millimeter" over "millimetre" (77 to 23).
• In Australia, there is a preference for "millimeter" over "millimetre" (65 to 35).
• In Liberia, there is not enough data to determine a preference between "millimeter" and "millimetre".
• In Ireland, there is a preference for "millimeter" over "millimetre" (71 to 29).
• In New Zealand, there is a preference for "millimeter" over "millimetre" (74 to 26).
• In Jamaica, there is a preference for "millimeter" over "millimetre" (92 to 8).
• In Trinidad & Tobago, there is a preference for "millimeter" over "millimetre" (100 to 0).
• In Guyana, there is a preference for "millimeter" over "millimetre" (100 to 0).

Examples

Below, we provide some examples of when to use millimeter or millimetre with sample sentences.

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