Hormuz crude transit under conflict risk: documented flows, not slogans

The Strait of Hormuz is not a metaphor. It is a narrow waterway between Oman and Iran that connects the Persian Gulf to the Gulf of Oman and the Arabian Sea, and it is deep and wide enough for the world's largest crude tankers. When regional conflict raises the risk that tankers cannot pass safely, or that loadings inside the Gulf cannot clear the strait, the global oil balance shifts through freight, insurance, delayed cargoes, and, in severe cases, shut-in production upstream of the chokepoint. Analysis of that risk has to start from documented flow volumes rather than assumed outage percentages.

The U.S. Energy Information Administration's World Oil Transit Chokepoints tables put total oil flows through Hormuz at 21.8 million barrels per day in 2023 and 20.7 million barrels per day in 2024, with 20.9 million barrels per day in the first half of 2025. Those totals include crude oil and condensate plus petroleum products. Crude and condensate alone averaged 15.8 million barrels per day in 2023, 14.6 million in 2024, and 14.7 million in the first half of 2025. Petroleum product flows were 6.0, 6.1, and 6.1 million barrels per day across the same three periods. In the first half of 2025, EIA equated Hormuz oil flows to about one-fifth of global petroleum liquids consumption and about one-quarter of total global maritime traded oil. Those fractions are why a Hormuz disruption is a systemic oil event rather than a local Gulf story.

An EIA Today in Energy piece archived from mid-2025 rounded 2024 oil flow through the strait at 20 million barrels per day, or about 20 percent of global petroleum liquids consumption, and noted that first-quarter 2025 flows remained relatively flat compared with 2024. The same analysis linked part of the 2022 to 2024 decline in crude and condensate transit to OPEC+ voluntary crude cuts that lowered exports from Saudi Arabia, Kuwait, and the United Arab Emirates, to Aramco's shift of some seaborne crude toward the East-West pipeline and Red Sea ports after Bab al-Mandeb disruption, and to more refining capacity inside the Gulf that absorbed crude locally. Between 2022 and the first half of 2025, EIA reported that crude and condensate volumes through Hormuz fell by 1.5 million barrels per day, only partly offset by a 0.5 million barrel per day rise in product cargoes.

Country shares matter for who loses barrels first if the strait tightens. Based on tanker-tracking data published by Vortexa and cited by EIA, Saudi Arabia moved more crude oil and condensate through Hormuz than any other country in 2024, at 5.5 million barrels per day, or 38 percent of total Hormuz crude and condensate flows that year. The United Arab Emirates also routes substantial volumes through the strait, with EIA noting Fujairah-related infrastructure as a partial bypass for some UAE barrels. Bypass capacity is real but limited. It does not replace the full Hormuz crude slate for Asia-bound Saudi and Kuwaiti barrels when the waterway is constrained.

LNG is part of the same geography even when the analytical question is oil. EIA's chokepoint tables show LNG flows through Hormuz at 10.6 billion cubic feet per day in 2023, 10.5 in 2024, and 11.4 in the first half of 2025. Around one-fifth of global LNG trade transited Hormuz in 2023 according to EIA's Red Sea Today in Energy note. Oil and LNG therefore share a physical corridor even though their contracts and buyers differ. A shipping risk premium that raises voyage costs or delays clearances affects both.

The implications of conflict are best understood as mechanisms. Documented mechanisms include higher war-risk insurance, longer routes if vessels wait or divert, reduced willingness of owners to enter the Gulf, and upstream shut-ins when storage fills and export routes are blocked. The EIA's September 2026 Short-Term Energy Outlook, as summarised by Oil and Gas Journal, described Middle East crude production shut-ins averaging an estimated 6.7 million barrels per day in August 2026, up from 5.0 million barrels per day in July, with fourth-quarter 2026 shut-ins expected to average about 5.7 million barrels per day while Hormuz and Bab el-Mandeb flows remained constrained. Producers and shippers were increasingly using pipeline and overland bypasses and ship-to-ship transfers. Those are published EIA assumptions and estimates for a disruption period, and they are the right starting point for any further scenario work.

Alternative routes do not erase the chokepoint. Saudi Arabia's East-West pipeline to Red Sea ports, including Yanbu, can move crude that would otherwise exit via Hormuz, but Bab el-Mandeb and Red Sea security then become the binding constraint. Oil and Gas Journal's STEO summary noted that attacks in Bab el-Mandeb roughly halved August 2026 loadings at Yanbu according to Vortexa estimates, after which Saudi barrels were rerouted through the Suez Canal at higher cost and longer voyage times for Asian buyers. Ship-to-ship transfers outside the Gulf can move some volume, but they add operational complexity and do not restore pre-disruption schedules automatically.

For importing economies, including those in South Asia that buy Middle East crude on the water, the planning question is landed cost and arrival timing under documented chokepoint statistics. A barrel that sits behind Hormuz is not a barrel in the residual market. Inventory draws reported in the same STEO summary (global oil inventories falling by an average 3.9 million barrels per day in the second quarter of 2026, with further forecast draws of 3.0 million barrels per day in the third quarter and 1.7 million barrels per day in the fourth) show how constrained exports transmit into stock accounting. Analysts should triangulate EIA chokepoint tables, STEO shut-in estimates, and secondary tanker trackers rather than anoint a single dashboard.

The public record does not provide a daily loss figure for a hypothetical full closure, nor Iranian export prices. What it does provide is the multi-year Hormuz flow series, the share of global liquids and seaborne trade those flows represent, the Saudi share of Hormuz crude and condensate in 2024, the LNG transit figures, and the STEO's published shut-in and inventory-draw estimates under Middle East disruption. Engineers and finance ministries can put those into scenarios. Slogans cannot.

Making energy security add up means treating Hormuz as a measured corridor with published throughput history and limited documented bypasses. Spare capacity upstream only helps if barrels can exit. Quota policy only helps if tankers sail. The strait remains critical precisely because the EIA numbers show how large the throughput still is even after OPEC+ cuts and Red Sea rerouting reduced some crude legs. That is the implication of the Iran-linked conflict for oil shipping: the risk sits on a route that still carried about 20 million barrels per day of oil in recent EIA readings, with Asia as a principal destination set. Precision about those flows is the starting point for any serious contingency plan.