Strait of Hormuz explained: Why it could spike your next gas fill-up

BEND, Ore. (KTVZ) — The Strait of Hormuz is easy to miss on a world map, a narrow ribbon of water squeezed between Iran and Oman, but it carries an outsized share of the world’s oil and gas.

Every day, tankers thread through designated “highways” on the water here, hauling roughly one‑fifth of global petroleum supplies from the Persian Gulf to markets in Europe, Asia, and beyond, making this tight passage one of the most critical and vulnerable chokepoints in the global economy

Where and what it is

The Strait of Hormuz lies between Iran to the north and Oman to the south, linking the Persian Gulf to the Gulf of Oman and the Arabian Sea beyond. At its narrowest point, it’s only about 33 kilometers (roughly 21 miles) wide, yet it is deep and wide enough to handle some of the world’s largest oil tankers.

To manage the heavy ship traffic, the strait has designated shipping lanes, essentially highways on the water, with tankers moving in one direction in one lane and in the opposite direction in another. For the oil‑producing states that ring the Persian Gulf, such as Saudi Arabia, Iraq, Kuwait, the United Arab Emirates, Qatar, and Bahrain, the Strait of Hormuz is the only direct maritime exit to the open ocean.

A brief history of a chokepoint

The strait’s strategic importance has been recognized for centuries, drawing in outside powers from Portugal in the 16th century to Britain in the 19th and 20th centuries, and later the United States and other Western navies. During the Iran–Iraq War in the 1980s, the so‑called “Tanker War” phase saw attacks on oil terminals and tankers in and around the Gulf, but the Strait of Hormuz itself was never fully closed, underscoring how vital it was to keep traffic moving even amid conflict.

In later decades, disputes over Iran’s nuclear program and regional tensions led Tehran at various points to threaten to block the waterway, prompting shows of force and naval patrols by the United States and its allies to deter any attempt to shut it down. Despite repeated crises, the strait has remained open, but each flare‑up tends to push oil prices higher because traders fear what even a temporary disruption could do to supplies.

How much oil and gas flows through

Energy agencies describe the Strait of Hormuz as the world’s most important oil transit chokepoint because of the sheer volume of fuel that moves through it. The U.S. Energy Information Administration estimates that in 2022, about 21 million barrels per day of petroleum liquids, roughly 21 percent of global consumption, transited the strait, along with significant volumes of liquefied natural gas.

Put another way, roughly one‑fifth of the world’s oil and a comparable share of seaborne gas exports pass through this narrow channel every day, effectively matching the “about one‑fifth of the world’s energy supply” figure often cited in broadcast explainers. Major importers in Asia and Europe, as well as markets in North America, rely on these flows either directly or indirectly through global supply chains.

Why does it matter so much for prices?

Oil and gas markets are global, so a disruption in one region can affect prices everywhere. Because there are few practical alternatives to the Strait of Hormuz, any threat of closure—whether from war, terrorism, or political standoffs—immediately raises the risk that a large chunk of world supply could be delayed or blocked.

Tankers could, in theory, reroute around Africa, but that would add thousands of miles to each journey, increasing travel time, fuel costs, and insurance premiums, all of which eventually show up in what consumers pay. Some pipelines bypass the Gulf, but their capacity is limited compared with the 20‑plus million barrels per day that normally move through the strait, so they can’t fully replace seaborne flows if the chokepoint is disrupted.

How it affects people locally

For drivers, the impact shows up most clearly at the pump: when tensions rise around the Strait of Hormuz, oil futures tend to jump, and gasoline prices can climb within days or weeks as refiners and retailers pass along higher costs. Airlines, trucking companies, and shipping firms also face higher fuel bills, which can translate into more expensive flights, freight, and consumer goods, from groceries to building materials.

Even people far from the Middle East feel the economic shock, because energy is woven into almost everything we buy and do, and investors often respond to Strait-related crises by pulling back, adding volatility to stock markets and retirement accounts. For communities tied to tourism or trade, swings in energy prices can make travel more expensive and squeeze local businesses’ budgets, underscoring how a narrow stretch of water on the other side of the world can have very local consequences.