Iran Matters Most When the Strait of Hormuz Is at Risk

The numbers explain why. The U.S. Energy Information Administration has repeatedly described the Strait of Hormuz as the world’s most important oil transit chokepoint. In recent years, around 20 million barrels of oil and petroleum liquids per day have moved through it, close to one-fifth of global petroleum consumption. The strait is also critical for gas. Qatar, one of the world’s largest exporters of liquefied natural gas, sends much of its LNG through the same route. That means a disruption in waters near Iran would not only hit oil prices. It could also tighten gas markets, especially in Europe and Asia, where utilities and industries still rely on LNG imports.

Iran’s own exports matter too, but in a more limited way than many people think. Because of sanctions, Iran has often sold less oil than its full production capacity would allow. Output has moved over time, but in broad terms Iran remains a significant producer inside OPEC, while its export volumes are constrained by politics, shipping risks, and payment barriers. In other words, Iran’s direct supply to the market is important, but the larger global fear is often indirect. The market worries less about the loss of every barrel from Iran itself than about the wider shock that could follow if conflict spreads across the Gulf.

That fear is grounded in history. During the 1980s Tanker War, ships in the Gulf were attacked as the Iran-Iraq conflict spilled into energy trade. In 2019, attacks on tankers near the Strait of Hormuz and drone strikes on Saudi oil facilities showed again how quickly regional tensions can threaten supply. The attack on Abqaiq in Saudi Arabia briefly knocked out about 5.7 million barrels per day of production, according to Saudi and international estimates at the time. That event did not happen in Iran, but it sharpened a lesson energy markets already knew: the Gulf is tightly connected, and a security shock in one place can rattle prices everywhere.

The reason this region matters so much is simple. A huge share of spare oil production capacity sits in Gulf states such as Saudi Arabia and the United Arab Emirates. Some of the world’s lowest-cost oil also comes from there. Asian economies including China, India, Japan, and South Korea rely heavily on Gulf crude. Europe has reduced Russian pipeline gas dependence since 2022 by buying more LNG, some of which still depends on shipping routes near Iran. So even countries trying to diversify away from one energy risk can run into another. Energy security is not just about who produces fuel. It is also about whether that fuel can move safely.

There are alternatives, but they are limited. Saudi Arabia has the East-West pipeline to move crude from its eastern oil fields to the Red Sea. The UAE has a pipeline from Abu Dhabi to Fujairah, outside the Strait of Hormuz. Those routes help, but they cannot fully replace the volume that normally passes through the strait. The International Energy Agency and market analysts have long noted that rerouting options fall well short of total Gulf export capacity. If shipping were seriously disrupted, some barrels could move by pipeline, but a large gap would remain. That is why even the threat of trouble can move prices before any actual outage happens.

The consequences go far beyond fuel traders. Oil price spikes feed into transport costs, food prices, manufacturing, aviation, and household budgets. Research across past oil shocks has shown that high and volatile energy prices can push up inflation and slow growth. In poorer importing countries, the damage is often sharper. Governments face bigger subsidy bills. Utilities pay more for fuel. Families already under pressure spend more on power and transport. In 2022, the world saw how energy shocks can quickly become political shocks, helping drive inflation, public anger, and budget strain in countries far removed from the original supply risk.

Iran also matters because it sits at the center of a broader regional balance. If diplomacy improves and sanctions ease, Iranian crude could return more fully to formal markets and add supply, which would help moderate prices. If tensions worsen, the opposite happens. Shipping insurance costs rise. Tanker routes become more expensive. Buyers look for replacement cargoes. Even if no full closure of the Strait of Hormuz occurs, the market can still tighten because trade becomes slower, riskier, and costlier. In energy, fear itself can have a price.

That is why the right question is not whether the world can survive without Iranian oil alone. It is whether the world can manage without stability around Iran. Those are different questions. The first is difficult but not impossible, especially with spare capacity elsewhere and strategic reserves. The second is much harder, because geography cannot be sanctioned away. A narrow waterway beside a conflict-prone region remains a structural weak point in the global economy.

The practical response is not mysterious, but it does require patience. Importing countries need more diverse supply sources, more storage, and stronger emergency plans. Strategic petroleum reserves still matter. So do investments in LNG flexibility, alternative pipelines, and stronger electricity grids that reduce the need for oil in power generation. Faster adoption of electric vehicles and more efficient transport can also reduce exposure over time. The less oil the world burns each day, the less power any single chokepoint holds over inflation and growth.

Diplomacy matters just as much as infrastructure. Stable shipping lanes depend on deterrence, naval coordination, and constant communication between rivals who do not trust each other. The world has learned again and again that energy markets can absorb many problems, but they struggle when geography, conflict, and fear meet in the same place.

Iran’s place in world energy is therefore larger than its export figures alone suggest. It is a producer, yes, but more than that, it is a gatekeeper beside one of the most sensitive arteries in global trade. That is why Iran remains central to world energy supply. Not because every barrel comes from Iran, but because so many of the world’s most important barrels must pass near it.