What terms of dollars what was the total cost of World War 1?

The total cost of World War I is estimated to have been around $186 billion in 1918 dollars, which translates to approximately $4.5 trillion when adjusted for inflation to 2023 dollars. This figure includes military expenditures, infrastructure damage, and the economic impact of the war on participating nations. The financial burden varied significantly between countries, with the Allies incurring the majority of the costs.