| Part of speech | common noun |
|---|---|
| Plural | millimeters |
| Diminutive | |
|---|---|
| Singular | Plural |
| millimetertjie | millimetertjies |
| Catalan | mil·limetre |
|---|---|
| Czech | milimetr |
| Danish | millimeter |
| Dutch | millimeter |
| English | millimetre |
| Esperanto | milimetro |
| Faeroese | millimetur |
| Finnish | millimetri |
| French | millimètre |
| German | Millimeter |
| Greek | χιλιοστόμετρο |
| Icelandic | millimetri |
| Luxemburgish | Millimeter |
| Malay | milimeter |
| Norwegian | millimeter |
| Papiamento | milimeter |
| Polish | milimetr |
| Portuguese | milímetro |
| Russian | миллиметр |
| Saterland Frisian | Millimeter |
| Scots | millimetre |
| Scottish Gaelic | milemeatair |
| Spanish | milímetro |
| Swahili | milimita |
| Swedish | millimeter |
| Thai | มิลลิเมตร |
| Turkish | milimetre |
| Welsh | milimetr |
| West Frisian | streep; milimeter |