Strait of Hormuz Oil: Why This Narrow Chokepoint Controls Global Energy

The Strait of Hormuz is a narrow band of water between Iran and Oman, and it carries a share of the world’s energy that few other places can match. Roughly a fifth of global petroleum liquids and a similar slice of liquefied natural gas pass through it. That concentration is why a single waterway commands so much attention from governments, navies, and oil traders.

Where the Strait of Hormuz Sits

The strait connects the Persian Gulf to the Gulf of Oman, which opens onto the Arabian Sea and the wider Indian Ocean. According to Encyclopaedia Britannica, it is the only sea route out of the Persian Gulf to the open ocean. Iran lies along the northern coast. Oman, specifically the Musandam Peninsula, holds the southern shore.

The waterway runs about 167 kilometers long. Its width ranges from around 97 kilometers at the wide end down to roughly 39 kilometers at the narrowest point, according to figures cited by Wikipedia. The shipping lanes themselves are much tighter than the full span suggests. To cut the risk of collision, tankers follow a traffic separation scheme with an inbound lane and an outbound lane, each about two miles wide, divided by a two-mile median. Those lanes sit within Omani territorial waters.

How Much Oil Moves Through the Strait of Hormuz

The numbers are large. The U.S. Energy Information Administration reported that oil flows through the Strait of Hormuz averaged about 20 million barrels per day in 2024, equal to roughly 20 percent of global petroleum liquids consumption. In the first half of 2025, the EIA put the figure at about 20.9 million barrels per day. That volume represented more than one-quarter of total global seaborne oil trade.

The mix matters too. The EIA’s data showed the flow split into roughly 15 million barrels per day of crude oil and condensate plus around 5.5 million barrels per day of refined products such as diesel, jet fuel, and fuel oil. Around one-fifth of global liquefied natural gas trade also moved through the strait in 2024, most of it from Qatar.

Key Facts at a Glance

Location: Between Iran (north) and Oman’s Musandam Peninsula (south), linking the Persian Gulf to the Gulf of Oman.
Length: About 167 km, with width narrowing to roughly 39 km.
Oil flow: About 20 million b/d in 2024, near 20 percent of global petroleum liquids consumption (EIA).
Seaborne trade share: More than a quarter of the world’s seaborne oil trade.
LNG: Around one-fifth of global LNG trade, mainly Qatari (EIA).
Top exporter via the strait: Saudi Arabia, about 38 percent of Hormuz crude flows in 2024 (EIA).

Who Depends on This Oil

Asia is the destination that stands out. The EIA found that 84 percent of the crude oil and condensate leaving the strait went to Asian markets in 2024. Four importers, China, India, Japan, and South Korea, together took 69 percent of all Hormuz crude flows that year. Saudi Arabia led the supply side, accounting for about 38 percent of Hormuz crude.

The United States is far less exposed by comparison. The EIA estimated American imports from Persian Gulf countries through the strait at around 0.5 million barrels per day in 2024, near 7 percent of total U.S. crude and condensate imports and about 2 percent of U.S. petroleum liquids consumption. The strait still affects American consumers, though, because oil prices are set in a global market and a disruption anywhere ripples everywhere.

A History of Tension

The strait has been a flashpoint for decades. According to History.com, Iran has claimed authority over the waterway since the 1979 Iranian Revolution, and Iranian officials have repeatedly raised the possibility of closing it during periods of friction with the United States.

The most serious past episode came during the so-called Tanker War in the 1980s, late in the 1980 to 1988 Iran-Iraq War. History.com records that Iraq attacked Iranian oil tankers in 1984, and Iran responded by laying naval mines in the Persian Gulf and harassing tankers tied to Iraq, Kuwait, and Saudi Arabia. The United States sent warships to escort neutral tankers through the area. Traffic was disrupted, yet the strait was never fully closed.

The Limited Alternatives

Bypassing the strait is hard, which is the core of its leverage. A handful of pipelines can carry some Gulf oil overland to ports outside the Persian Gulf. The EIA notes that Saudi Arabia operates an East-West crude pipeline to the Red Sea and the United Arab Emirates runs a pipeline to Fujairah on the Gulf of Oman. Combined spare capacity on those two lines was estimated at roughly 2.6 million barrels per day.

That is a small fraction of the 20 million barrels that normally transit Hormuz each day. Brookings analysis cited routing through Saudi, Emirati, and Iraqi pipelines as able to absorb perhaps half of typical Hormuz volumes, and at higher cost. The table below shows the scale of the gap.

Measure	Approximate figure
Daily oil flow through Hormuz (2024)	20 million b/d
Share of global petroleum liquids consumption	~20 percent
Share of global seaborne oil trade	More than 25 percent
Spare Saudi + UAE pipeline bypass capacity	~2.6 million b/d

Because so little oil can be rerouted quickly, even the threat of a closure tends to push prices up. The waterway is deep and wide enough for the largest crude tankers, so the issue is rarely capacity. The issue is security.

Frequently Asked Questions

How much oil passes through the Strait of Hormuz?

The EIA reported about 20 million barrels per day in 2024, around 20 percent of global petroleum liquids consumption, rising to roughly 20.9 million barrels per day in the first half of 2025. That includes both crude oil and refined products.

Can Iran legally close the Strait of Hormuz?

The shipping lanes lie within Omani territorial waters, and the strait is used for international navigation. Iran has threatened closure at times of tension, as History.com documents, but it has not carried out a full closure. Closing the strait would also disrupt Iran’s own exports, which transit the same waterway.

Why does the strait matter to countries that do not buy Gulf oil?

Oil trades on a global market. A disruption at Hormuz would raise prices worldwide, including in countries with little direct dependence on Gulf crude. The EIA notes that 84 percent of crude leaving the strait went to Asia in 2024, but price effects would reach buyers everywhere.

Why It Still Matters

The Strait of Hormuz concentrates an enormous share of the world’s oil and gas into a single, narrow corridor with no easy substitute. That combination of high volume and low redundancy explains why a waterway most people never see can move markets within hours. For policymakers and traders alike, the strait remains one of the most watched points on the map.