The Strait of Hormuz is the world’s most important oil chokepoint. In 2024, roughly 20 million barrels of oil per day flowed through this narrow waterway, equal to about one-fifth of all global petroleum consumption. A disruption here would ripple through fuel prices, supply chains, and economies worldwide within days.
Where It Is and Why Geography Matters
The Strait of Hormuz connects the Persian Gulf to the Gulf of Oman and, from there, the open ocean. It separates Iran to the north from Oman’s Musandam Peninsula to the south. At its narrowest point, the strait is just 35 miles wide, but the usable space for massive oil tankers is far tighter: ships travel through designated inbound and outbound lanes that are each only 2 miles wide, separated by a 2-mile buffer zone.
That means the bulk of the world’s seaborne oil trade funnels through a corridor roughly 6 miles across. There is no alternative sea route out of the Persian Gulf. Saudi Arabia, Iraq, Kuwait, the United Arab Emirates, and Qatar all rely on this single passage to export their oil and natural gas to the rest of the world.
How Much Energy Passes Through
The numbers are staggering. In 2024, flows through the strait accounted for more than one-quarter of all global seaborne oil trade. That includes crude oil, refined petroleum products like gasoline and diesel, and other liquid fuels. No other waterway comes close to handling this volume.
Oil isn’t the only commodity at stake. About 20% of the world’s liquefied natural gas (LNG) trade also transits the strait, almost entirely from Qatar and the UAE. Qatar alone exported roughly 9.3 billion cubic feet per day of LNG through Hormuz in 2024, with the UAE adding another 0.7 billion cubic feet per day. Countries across Asia and Europe depend on these shipments for electricity generation and heating.
Who Depends on It Most
The biggest consumers of oil flowing through Hormuz are in Asia. China, India, Japan, and South Korea all import massive volumes of crude from Persian Gulf producers, and virtually all of it passes through this strait. For these nations, a disruption wouldn’t just raise prices; it could threaten their ability to keep factories running, vehicles fueled, and power grids stable.
Even countries that don’t directly import oil through Hormuz would feel the effects. Oil is priced on a global market. If 20 million barrels per day suddenly became unavailable or even uncertain, prices everywhere would spike. Analysts warn that a prolonged closure could push oil into triple digits per barrel. One energy strategist described such a scenario as potentially three times the severity of the 1970s Arab oil embargo, with LNG prices retesting the record highs seen in 2022.
Iran’s Role and the Legal Dispute
Iran’s coastline runs along the entire northern side of the strait, giving it significant geographic leverage. Tehran has repeatedly threatened to close or restrict the waterway during periods of tension, particularly when facing economic sanctions or military threats.
There’s also a legal dimension. Under the United Nations Convention on the Law of the Sea (UNCLOS), international straits like Hormuz are governed by “transit passage,” a rule that guarantees all ships, including military vessels, can move freely without needing permission from bordering countries. Iran rejects this framework. It accepts “innocent passage,” which allows foreign ships through its territorial waters only if they don’t threaten peace and security, but demands advance approval for military vessels. Most of the international community views this as an attempt to control the chokepoint in defiance of international law.
This disagreement isn’t theoretical. It shapes everyday naval operations and has led to confrontations between Iranian forces and foreign warships and commercial tankers passing through the strait.
Military Presence and Security Operations
Given the strait’s importance, several nations maintain a permanent military presence in the region. The U.S. Fifth Fleet is headquartered in Bahrain, just a short distance from Hormuz, and conducts regular patrols.
In 2019, after a series of attacks on commercial tankers and seizures of vessels, the International Maritime Security Construct (IMSC) was established. This coalition, also based in Bahrain under the Fifth Fleet, includes forces from Albania, Bahrain, Estonia, Lithuania, Romania, Saudi Arabia, the UAE, the United Kingdom, and the United States. Its operational arm, Coalition Task Force Sentinel, was created specifically to deter state-sponsored threats and reassure commercial shipping companies that their vessels could transit safely. The coalition runs monthly exercises to keep communication and coordination sharp among partner navies.
Can Oil Bypass the Strait?
Saudi Arabia and the UAE have built pipelines designed to move oil overland, bypassing the strait entirely. Saudi Arabia’s East-West Pipeline can carry crude to Red Sea export terminals, and the UAE’s Habshan-Fujairah pipeline sends oil directly to a port on the Gulf of Oman, outside the chokepoint. These routes provide some insurance, but their combined capacity falls well short of replacing the 20 million barrels per day that currently flow through Hormuz. They’re a partial safety valve, not a substitute.
There is no pipeline alternative for LNG. Qatar’s enormous gas exports have no overland option and remain entirely dependent on tanker traffic through the strait.
What a Closure Would Mean
Even a short disruption would send shockwaves through global energy markets. With oil recently trading around $62 to $72 per barrel, analysts project that a sustained blockade could drive prices well above $100. The effects would cascade: higher gasoline prices, more expensive shipping, rising costs for plastics and chemicals derived from petroleum, and potential energy shortages in import-dependent countries.
A full closure has never actually happened, in part because it would also devastate Iran’s own economy. Iran exports its oil through the strait too, and its trading partners in China and elsewhere would be cut off. This mutual vulnerability acts as a deterrent, but it doesn’t eliminate the risk. During periods of acute tension, even the threat of disruption has been enough to move global oil prices by several dollars per barrel within hours.