Mint Explainer: How long can Iran block the Strait of Hormuz?

However, the strait is a double-edged sword for Iran. While it is a powerful strategic lever, a total shutdown would also paralyze the Iranian economy as nearly 95% of its oil exports—about 1.6 million barrels per day, destined primarily for China—pass through these waters. China gets the bulk of its crude needs from West Asia and will certainly pressure Iran, its ally, to reopen the strait if the closure continues.