Kalibre

Kalibre is a term used in firearms terminology to denote the diameter of a gun's bore and the corresponding ammunition. In many languages the word is spelled kalibre, calibre, or caliber, reflecting different orthographies across regions. The core idea is the bore diameter, usually expressed in millimeters or inches, and used to classify firearms and ammunition.

Definition and usage: A firearm's caliber describes the internal diameter of its barrel in relation to the bullet size it fires. For instance, a 9 mm pistol fires ammunition designed for a 9 mm bore; a .50 caliber rifle fires bullets with roughly 0.50 inch diameter. The designation can also indicate cartridge case dimensions and overall cartridge length in some systems, but the central meaning is bore diameter.

In international contexts, kalibre is used in languages such as Turkish, with the corresponding French spelling being calibre. In English, the conventional spelling is caliber (American) or calibre (British). As a proper noun, Kalibre may appear as a brand name or product line in specific markets, though such uses are not universal.

See also: Caliber; Calibre (software).