LITR – az kalimai fransuzii «litre» girifta shudaast va vohidi gayrisistemavii hajm ast va bo harfi lotinii «L» ishora meshavad. Litr ba Vohidi baynalmillalii chenak vorid karda nashudaast. Hajmi 1 litr barobari 1 dm³ = 0,001 m³ meboshad. Andozai 1 litr ob barobari 10 satimetri murraba meboshad, ki vaznash ba 1 kilogram dar holati haroratash +4 budan barobar ast. Dar jahoni muossir ba sifati vohidi chenaki baynalmillali asosan metri murabba (m³) istifoda meshavad. Hajmi 1 litr barobari 1000 miligram ast. (1L=1000ml.).
Litrro asosan baroi chen kardani mavodhoi moe istifoda meshavad, ki jumlai onho ob, benzin, ravgan va gayra. Vazni litr vobasta ba namudi moe metavonad gunogun boshad. Kalimai Litrro tojikon badi hamroh shudani Osiyoi Miyona ba Russiya istifoda shudanashro ogoz namudand.