India, March 9 -- The United States is spending approximately $891 million every day fighting Iran, with the total bill for the conflict's first week alone reaching $6 billion - and experts warning the final tally could climb to tens of billions more, even as the war's economic shockwaves ripple far beyond American shores and West Asia.

The Pentagon told the US Congress that the first week of the war cost approximately $6 billion, with Republicans already expecting the administration to seek more funding, reported the New York Times on Monday.

Follow: Updates on the US-Iran war and fallout

Analysis by the Centre for Strategic and International Studies (CSIS), a Washington-based think tank, put the per-day cost at $891.4 million based o...