The first six days of the military campaign against Iran have cost the US at least $11.3 billion.

Chris Coons, the top Democrat on the defense appropriations subcommittee, said preliminary calculations show the war cost at least $11 billion in just the first six days, The Caspian Post reports via foreign media.

The figure was presented during a confidential briefing for lawmakers but does not yet include all military expenses.

Administration officials also told legislators that $5.6 billion worth of munitions were used during the first two days of strikes alone.

The military campaign began on February 28 with airstrikes carried out by the US and Israel. Since then, the conflict has reportedly claimed around 2,000 lives, mostly in Iran and Lebanon, while also triggering turbulence in global energy markets and transportation networks.

Members of Congress have raised concerns that the conflict could drain US weapons stockpiles, particularly as the defense industry faces growing demand. Last week, President Trump met with executives from seven major defense contractors to discuss accelerating weapons production and replenishing supplies.

The administration has not yet released a public estimate of the total cost or expected duration of the conflict. Speaking during a visit to Kentucky, Trump declared that “we won” the war but said US operations would continue until the mission is fully completed.

Meanwhile, Democratic lawmakers have demanded sworn public testimony from administration officials about the president’s war strategy - including how long the conflict may last and what Washington plans to do with Iran once the fighting ends.