how long did world war i last

World War I lasted a little over four years, from 28 July 1914 to 11 November 1918.

Quick Scoop

• The commonly accepted dates are 28 July 1914 (Austria-Hungary’s declaration of war on Serbia) to 11 November 1918 (the Armistice with Germany), making the war about 4 years and 3.5 months long.

• In total, that comes out to roughly 1,567 days of large-scale, officially recognized warfare between the main coalitions (Allies and Central Powers).

• Some historians note that certain countries experienced a slightly different “length” of World War I because they entered or exited the fighting at different times, but the 1914–1918 window is the standard answer.

Information gathered from public forums or data available on the internet and portrayed here.