RISINGIEA & U.S. Defense IntelligenceMarch 2026🌍 GLOBALEconomy
🚢

Iran Threatens to Close Hormuz — 21M Barrels/Day at Risk. Calculate Your Cost.

As President Trump issued a 48-hour military ultimatum to Iran in March 2026, Tehran threatened to close the Strait of Hormuz — the single most critical energy chokepoint on Earth, through which 21 million barrels of oil per day (21% of global consumption) flows alongside 25-30% of global LNG. With no viable alternative route capable of handling more than 10% of normal Hormuz volume, even a 2-week closure would send Brent crude to $130-150/barrel and add $1.00+ per gallon at US fuel pumps. This calculator quantifies your personal or business exposure using IEA supply disruption models.

Concept Fundamentals
21M bbl
Daily Oil at Risk
21%
Global Oil Share
$130-150
Projected Oil Price
70 days
SPR Buffer
Calculate Blockade ImpactUse the calculator below to see how this story affects you personally

About This Calculator: Strait of Hormuz Oil Blockade Impact

Why: The Strait of Hormuz represents the world's most critical energy chokepoint, and Iran's March 2026 closure threat — made in response to President Trump's military ultimatum — is the most credible blockade scenario in the strait's modern history. Households face fuel price spikes of $0.90-1.30/gallon; businesses with vehicle fleets face multi-thousand dollar monthly increases; shippers face $1M+ per vessel rerouting costs. This calculator translates the geopolitical crisis into your personal financial exposure using IEA-validated supply disruption models.

How: Enter your daily fuel consumption in gallons, any cargo shipping volume, your economy's oil dependency percentage, your estimated blockade duration, and the current oil price. The calculator applies the IEA's 3.1x supply-to-price multiplier to the 20% Hormuz supply removal, adjusts for your duration and dependency, and outputs fuel price increases, monthly cost impacts, shipping premiums, and the economic multiplier effect.

Your exact fuel price increase per gallon/litre at each blockade duration milestoneYour monthly and total financial exposure from fuel costs and shipping premiums

Try a Scenario:

Total daily petrol, diesel, or jet fuel consumption across all your vehicles or operations
gal/day
Your user category determines which cost impacts are most relevant to your situation
Monthly container volume if you are a shipper or importer. Enter 0 for households and most businesses.
TEUs
What percentage of your energy costs are tied to oil products? Pure EV driver = 0%, petrol-only business = 100%
%
RAND Corp estimates 2-8 weeks; IEA planning uses 4-12 weeks. Use 4 for base case, 8 for severe scenario.
weeks
Current Brent crude spot price. Default is $85/barrel (pre-crisis baseline, March 2026)
$/barrel
hormuz_blockade_analysis.shCALCULATED
Fuel Price Increase
+$0.23/gal
Monthly Fuel Extra
$14
Annual Extra Cost
$25
Oil at Peak
$99/bbl
Shipping Premium
$0
Total Shock Cost
$23
Economic Multiplier
80.0% drag
SPR Buffer Days
272d

Oil Price Trajectory During Blockade

Projected Brent crude price ramp-up, peak, and recovery vs pre-crisis baseline

Your Blockade Cost Breakdown

Monthly fuel extra cost, shipping premium, and total economic impact with 1.8x multiplier

Global Oil Supply Routes: Hormuz Dominance

The Strait of Hormuz vs all other maritime oil routes combined (million bbl/day)

Strategic Petroleum Reserves vs Hormuz Flow

IEA reserves context: US SPR, total IEA reserves, and monthly Hormuz transit volume (millions of barrels)

⚠️For educational and informational purposes only. Verify with a qualified professional.

Iran's threat to close the Strait of Hormuz — issued in March 2026 following President Trump's 48-hour military ultimatum — represents the most credible blockade threat in the strait's modern history. The Strait of Hormuz, at its narrowest just 21 miles wide between Iran and Oman, is the world's single most critical energy chokepoint: approximately 21 million barrels of oil per day (21% of global consumption) flow through it, alongside 25-30% of the world's LNG trade. There is no replacement route — the Abu Dhabi Crude Oil Pipeline can only carry 1.5 million barrels/day, less than 10% of normal Hormuz volume. A confirmed closure would send Brent crude to $130-150/barrel within 2-4 weeks, adding $1.00-1.20/gallon at the pump in the US and £0.22-0.28/litre in the UK, while rerouting ships via the Cape of Good Hope adds 15-18 days and $1.1-2.6M per vessel journey.

21M
Barrels per day through Hormuz
21%
Share of global daily oil consumption
21 mi
Narrowest point of the strait
+15 days
Cape of Good Hope rerouting time

Sources: IEA Oil Market Report March 2026, U.S. EIA Petroleum Supply Monthly, Lloyd's Marine Intelligence Unit, IMF World Economic Outlook.

Key Takeaways

  • • A Hormuz blockade is qualitatively different from previous oil disruptions — it would simultaneously cut off oil AND LNG from the Gulf, eliminating the historical substitution option that buffered previous shocks.
  • • The IEA's strategic petroleum reserves (1.5 billion barrels total) provide approximately 70 days of cushion at full Hormuz flow, but SPR deployment takes 4-7 days to reach markets and cannot replace the lost volume indefinitely.
  • • Shipping rerouting via the Cape of Good Hope is not a permanent solution — it increases per-voyage fuel costs by 60-70%, reduces effective global fleet capacity by 12-18%, and pushes container freight rates to levels last seen during the 2021-2022 supply chain crisis.
  • • The IMF estimates a sustained Hormuz closure would reduce global GDP by 1.5-2.5% and push global inflation up by 2-3 percentage points, reversing all of the disinflation gains of 2023-2025.

Did You Know?

🚢 The Strait of Hormuz handles 35% of all seaborne-traded crude oil globally — more than the next 4 largest maritime oil routes combined.
🛢️ Saudi Arabia's East-West pipeline (Petroline) can carry 5 million bbl/day westward — but this still leaves 16 million bbl/day with no alternative route if Hormuz closes.
⛵ During the 1984-1988 "Tanker War," Iran and Iraq attacked 451 ships in the Gulf — yet the strait never fully closed, demonstrating the immense economic cost of even partial disruption.
💡 Japan has no domestic oil production and stores just 200+ days of strategic reserves — making it the most vulnerable OECD economy to a Hormuz closure scenario.
📊 The shipping insurance market (Lloyd's of London) raised war risk premiums for Gulf routes by 400-600% within 72 hours of the Iran threat — a market signal of extreme perceived risk.
🎯 Iran has laid approximately 2,000 naval mines in the Gulf region according to US Naval Intelligence estimates — mine clearance operations typically take 2-6 weeks per 1,000 sq km of coverage.

How Would a Hormuz Blockade Actually Work?

Iran's Blockade Mechanisms

Iran has three primary tools to threaten or implement a Hormuz blockade: naval mines (estimated 2,000+ in inventory), fast attack boats and swarming tactics that make tanker navigation hazardous, and anti-ship missiles (Noor, Qader, Khalij Fars) with ranges of 120-300km that can target VLCCs. Iran does not need to physically "close" the strait — even the credible threat of mine-laying or missile attacks causes shipping companies to reroute, effectively cutting traffic. Insurance market responses (400-600% war risk premium increases) confirm that even a partial threat is economically equivalent to a full closure from a shipping perspective.

Price Transmission to Fuel Markets

Crude oil price increases reach retail fuel prices with a 4-6 week lag in most markets. The standard transmission model shows $1/barrel crude increase = $0.024/gallon at the pump in the US (including refining margins and taxes). A $45/barrel crude spike (from $85 to $130) thus equals approximately $1.08/gallon at US gas stations. The pass-through is faster in markets with thinner retail margins (developing economies) and slower in markets with price subsidies (India, Saudi Arabia). LNG prices follow crude with a 2-4 month contract lag, meaning European gas bills feel the full impact later but are hit harder per unit of energy.

The Cape of Good Hope Rerouting Economic Impact

Vessels rerouting from the Gulf to Europe via the Cape of Good Hope add approximately 8,500 nautical miles and 12-18 days of transit time. At VLCC charter rates of $45,000-70,000/day, each additional voyage costs $540,000-$1.26M extra. For container ships, the increased transit time reduces effective global fleet capacity by 12-18% (the same ships make fewer voyages per year), causing spot container rates to surge. During the 2021-2022 supply chain crisis, similar effective capacity reductions pushed container rates to $20,000/FEU — compared to a pre-crisis norm of $1,500-2,500/FEU — providing a benchmark for possible 2026 impacts.

Expert Tips: Managing Your Hormuz Blockade Exposure

For drivers — consider fuel cards with price locks: Several major fuel card providers (Wex, Fleetcor, BP Fuel Cards) offer price-lock programs that fix fuel prices for 3-6 months. Securing a lock within the next 2-4 weeks (before crude hits $120+) could save $0.60-1.10/gallon for the duration of the blockade scenario.
For businesses with shipping exposure — consider forward freight agreements: Baltic Exchange-based Forward Freight Agreements (FFAs) allow businesses to lock in container and tanker freight rates for 6-12 months. This is standard practice for major commodity traders and increasingly accessible through shipbrokers like Clarksons and Braemar.
Monitor strategic reserve releases: IEA SPR release announcements typically reduce oil prices by $8-15/barrel temporarily. Following IEA announcement calendars and central bank signals allows businesses and households to time energy procurement decisions advantageously during the blockade period.
Electric vehicles become economically compelling immediately: At $6.00/gallon (blockade scenario), an EV with 3.5 miles/kWh at $0.14/kWh costs the equivalent of $0.50/gallon. The fuel savings payback on an EV accelerates from 5-6 years under normal conditions to 2-3 years — making fleet transition decisions urgent for businesses with vehicle fleets.

Historical Hormuz Threat Events vs 2026

EventYearThreat LevelOil Price ImpactOutcome
Tanker War1984-88Moderate (attacks only)+15-25%Strait partially disrupted, never closed
First Gulf War1990-91Low (Iraq, not Iran)+80% spike then crashSPR released; market stabilised in 60 days
Iran nuclear standoff2011-12High threat (rhetoric)+$20/bbl risk premiumStrait not closed; sanctions imposed instead
IRGC seizure of tankers2019Very high (actual seizures)+3-5% spikeUS forces deployed; escalation contained
Houthi Red Sea attacks2023-24Moderate (Bab-el-Mandeb)+$8-12/bblRerouting via Cape; Hormuz unaffected
2026 Iran-US Conflict2026Extreme (active war)+60-75% projectedActive military conflict; outcome uncertain

Frequently Asked Questions

How much oil passes through the Strait of Hormuz each day?

Approximately 21 million barrels per day flow through the Strait of Hormuz, representing roughly 21% of global oil consumption and 35% of all seaborne-traded crude oil and petroleum products. The strait is also the transit point for 25-30% of global liquefied natural gas (LNG) trade, primarily from Qatar. There is no viable alternative pipeline route that could handle more than 5-6 million barrels per day — making Hormuz a true chokepoint.

How much would oil prices spike if the Strait of Hormuz was closed?

The IEA's commodity shock models project Brent crude rising from ~$85/barrel to $130-150/barrel within 2-4 weeks of a confirmed Hormuz blockade. Academic research on the 1973 embargo (5% supply cut) and 2022 Russia-Ukraine war (8% reduction) shows crude oil prices rise approximately 3-3.5% for every 1% of sustained supply reduction. A Hormuz closure removing 20% of global supply would thus imply a 60-70% price surge, though the actual peak depends on strategic reserve releases.

What is the Cape of Good Hope rerouting cost for shipping?

Ships rerouting from the Persian Gulf to Europe or the US East Coast via the Cape of Good Hope add approximately 8,500 nautical miles and 12-18 extra days at sea compared to the Suez Canal route. At current Very Large Crude Carrier (VLCC) charter rates of $45,000-70,000/day, this adds $540,000-$1.26M per vessel journey. Container shipping on Asian trade lanes adds 14-16 days, increasing freight costs by 15-25% per TEU and contributing to renewed inflationary pressures on goods prices globally.

How long could Iran realistically block the Strait of Hormuz?

Military analysts at RAND Corporation and the Institute for the Study of War assess Iran's ability to sustain a Hormuz closure at 2-8 weeks before US and GCC countermeasures (minesweeping, air dominance, naval escort convoys) reopen the channel. However, even a 2-week closure would drain strategic petroleum reserves significantly and cause a 35-50% oil price spike. A prolonged partial blockade — using mines and drone harassment to slow rather than stop traffic — could be sustained for 3-6 months at reduced severity.

What are the strategic petroleum reserve (SPR) options if Hormuz is blocked?

The IEA member countries collectively hold approximately 1.5 billion barrels of strategic petroleum reserves, sufficient to replace approximately 70 days of Hormuz transit volumes. The US SPR alone holds ~350-370 million barrels (after recent releases) — providing a critical buffer. The IEA has coordinated SPR releases twice before: during the 1991 Gulf War and the 2011 Libyan crisis. A coordinated 60-million-barrel emergency release (as in 2022) can reduce prices by $10-15/barrel temporarily while military operations proceed.

How does a Hormuz blockade affect retail fuel prices for drivers?

Retail fuel prices reflect crude oil with a 4-6 week lag at the pump. A $45/barrel crude oil increase (Brent from $85 to $130) historically translates to roughly $0.95-1.10 per gallon ($0.25-0.29 per litre) increase at the pump in the US, and £0.18-0.24 per litre in the UK. For a driver covering 1,000 miles/month at 30 mpg, this represents an extra $32-37/month in fuel costs — on top of elevated home energy bills from the same supply shock.

Key Statistics: Strait of Hormuz by the Numbers

21M bbl
Daily oil transit through Hormuz
30%
Global LNG trade through Hormuz
$1.08/gal
US pump price increase at $130 crude
70 days
IEA strategic reserve buffer

Which Countries Face the Most Acute Hormuz Closure Risk?

A Hormuz closure has dramatically different implications depending on a country's energy import dependency, strategic reserve levels, and alternative supply options. Here is how the world's major economies rank by acute vulnerability:

The key variables are: (1) what share of imports transit Hormuz, (2) how many days of strategic reserves are available, and (3) whether alternative suppliers can realistically fill the gap within 30-60 days. Countries with high dependency and low reserves face the sharpest and fastest economic shock.

Vulnerability ratings: Critical = immediate rationing risk; Very High = severe price spike within 2 weeks; High = significant impact within 30 days; Moderate = manageable with SPR deployment.

🇯🇵JapanCritical

88% oil import dependent. 35% from Gulf. 200+ days strategic reserves available. Economic cost of full Hormuz closure: -2.8% GDP in first year. Automotive, steel, and petrochemical sectors most exposed.

🇰🇷South KoreaCritical

95% oil import dependent. 70% LNG from Gulf. 90 days strategic reserves. Home to major refineries processing Gulf crude exclusively. GDP sensitivity: -2.5% per year of blockade.

🇮🇳IndiaVery High

Imports 85% of oil needs. 35% from Gulf. Particularly exposed via cooking gas (LPG). Government subsidises fuel — fiscal cost of maintaining subsidies escalates dramatically.

🇨🇳ChinaHigh

World's largest oil importer (12M bbl/day). 45% from Gulf. 90-day strategic reserves. Domestic coal buffers electricity but transport exposed. Beijing has strong incentive to negotiate parallel diplomacy to resolve crisis.

🇪🇺European UnionHigh (Gas-Focused)

Post-Ukraine, EU relies on Gulf LNG (Qatar) for 18-22% of gas. Strategic gas reserves at 65-70% capacity. Recession risk if blockade exceeds 8 weeks as electricity prices spike.

🇺🇸United StatesModerate

Net oil exporter (13.2M bbl/day production). Still imports Gulf crude for Gulf Coast refineries. US Brent-correlated prices mean consumers still feel full global price impact. SPR = 370M barrel buffer available.

Can the World Replace Hormuz? Alternative Routes Analysed

The critical question during any Hormuz closure threat is whether alternative routes can absorb the diverted volume. The answer, unfortunately for global energy markets, is no — not at anything close to current Hormuz throughput levels.

Alternative RouteMax Capacity% of Hormuz VolumeAdditional CostLimitation
Abu Dhabi Crude Oil Pipeline (ADCOP)1.5M bbl/day7.1%No rerouting costOnly serves UAE crude; not available to others
Saudi East-West Pipeline (Petroline)5.0M bbl/day23.8%MinimalSaudi crude only; capacity shared with internal use
Cape of Good Hope reroutingUnlimited (time limited)Theoretically 100%+$540K-1.26M/voyageAdds 15-18 days; reduces annual fleet capacity 12-18%
US/Canada domestic production ramp+0.5M bbl/day in 90 days2.4%Normal production costCannot scale fast enough; shale has 60-90 day ramp time
IEA Strategic Reserve Release60M barrels (coordinated)~3 days bufferPolitical cost onlyEmergency buffer only; not a permanent route

Bottom line: Even using all available alternatives simultaneously (ADCOP + Petroline + maximum Cape rerouting), approximately 14-15 million barrels per day of the normal 21 million bbl/day Hormuz flow cannot be replaced within 30-60 days. This structural supply gap is why markets price a Hormuz closure as a 60-70% crude price surge rather than a manageable disruption.

Blockade Scenario Planning: Your Costs Across Different Durations

Military and energy analysts have modelled four distinct Hormuz blockade scenarios based on historical precedent and Iran's assessed military capability. Understanding which scenario is most likely helps calibrate your hedging decisions.

Scenario A: Short Disruption (1-2 weeks) — Most Likely

US Navy deploys minesweepers and escort convoys within 10-14 days. Traffic resumes at 60% capacity. Oil peaks at $110-120/barrel then retreats rapidly as SPR releases stabilise markets. Consumer fuel prices rise 15-25% temporarily. Economic GDP impact: -0.2 to -0.4%. Historical precedent: 1988 re-flagging operation resolved similar threats in ~3 weeks.

Scenario B: Medium Disruption (4-8 weeks) — IEA Base Case

Partial blockade maintained through mine-laying and harassment. Traffic slows 50-70%. Oil reaches $130-145/barrel. SPR fully deployed but insufficient. Consumer fuel prices rise 35-55%. Airline, trucking, and shipping industries face severe profit impacts. Economic GDP impact: -0.6 to -1.0%.

Scenario C: Prolonged Partial Closure (3-6 months) — Severe

Iran uses mine warfare and missile threats to maintain a persistent "grey zone" closure. Some tankers transit at risk; most reroute via Cape. LNG export disruptions begin affecting European gas prices. Oil at $140-160/barrel at peak. Global recession risk becomes material. GDP impact: -1.2 to -1.8%.

Scenario D: Full Closure (8+ weeks) — Tail Risk

Complete cessation of traffic. Oil prices would exceed $180-200/barrel in spot markets (2008 prices were $147 with no actual blockade). Western economies enter immediate recession. US likely deploys full carrier battle group response. Historically unprecedented outside of world wars. GDP impact: -2.5 to -4% globally.

Official Data Sources

The Strait of Hormuz: Geographic and Strategic Deep Dive

Understanding the physical geography and strategic importance of the Strait of Hormuz is essential for assessing the credibility and likely duration of the 2026 blockade threat.

Physical Characteristics

  • Width at narrowest: 21 nautical miles (38.9 km)
  • Navigable channel width: Two 3.2-km lanes (inbound + outbound)
  • Depth: 30-200+ metres (sufficient for VLCCs)
  • Location: Between Iran (north) and Oman/UAE (south)
  • Iranian coastline control: Iran controls the northern shore throughout
  • Tidal range: 1-3 metres — predictable, aids navigation

Daily Traffic Volume

  • Crude oil tankers: 15-17 per day (VLCCs and Suezmax)
  • LNG carriers: 3-5 per day (from Qatar)
  • Refined products tankers: 4-6 per day
  • Total vessels (all types): 60-80 per day
  • Annual oil transit value: ~$650 billion at $85/barrel
  • Busiest periods: Asian morning hours when Japanese/Korean imports peak

Iran's Military Assets Near the Strait

  • Naval mines: 2,000+ in inventory (US Naval Intelligence)
  • Fast attack craft: 200+ IRGC Navy vessels, capable of swarming
  • Anti-ship missiles: Noor (120km), Qader (200km), Khalij Fars (300km)
  • Submarine fleet: 3 Kilo-class + 17 midget submarines
  • Shore-based artillery: On Qeshm, Hormuz, and Larak islands
  • IRGC Navy HQ: Bandar Abbas — 50km from the strait centre

US/GCC Countermeasure Capabilities

  • US 5th Fleet: Based in Bahrain, 30+ warships permanently assigned
  • Minesweeper capacity: USS Avenger class — 10-14 days per 100 sq km
  • Carrier strike group: Can deploy within 3-5 days from Indian Ocean
  • Convoy escort: Can protect 4-6 tankers per escort group
  • GCC naval cooperation: Saudi, UAE, Kuwaiti navies assist
  • Timeline to reopen: 14-45 days for a full military response

Quick Reference: Hormuz Blockade Key Numbers

Oil Price Scenarios

  • Pre-crisis: $85/barrel
  • 2-week partial: $100-115
  • 4-week base case: $120-135
  • 8-week severe: $140-160
  • Full closure: $170-200+

US Pump Price Impact

  • At $100/bbl crude: +$0.32/gal
  • At $115/bbl crude: +$0.64/gal
  • At $130/bbl crude: +$0.96/gal
  • At $150/bbl crude: +$1.38/gal
  • US average pre-crisis: $3.50/gal

Shipping Cost Reference

  • VLCC Cape rerouting: +$1.26M/voyage
  • Extra transit time: +15-18 days
  • Container rate surge: +80-150%
  • War risk premium: +400-600%
  • LNG carrier Cape rerouting: N/A (Qatar stuck)

Fuel Cost Management Roadmap During the Blockade Scenario

For households and businesses managing fuel costs during the Hormuz crisis, timing and preparation are critical. Here is a week-by-week decision framework based on the four blockade scenarios:

Before Blockade Confirmed (Now)

  • Fill vehicle fuel tanks; consider keeping tanks topped up weekly
  • Check if fuel card provider offers price-lock products
  • Businesses: calculate projected fuel exposure using this calculator
  • Consider pre-purchasing heating oil or propane at current prices

Weeks 1-2 (Initial Shock)

  • Avoid panic buying — fuel queues will be temporary
  • Monitor IEA and US DOE announcements for SPR release signals
  • Suspend non-essential vehicle journeys where possible
  • Businesses: implement fuel consumption reporting across fleet

Weeks 3-6 (Peak Disruption)

  • Prices peak — avoid large fuel purchases at spot if possible
  • If using diesel generators: ensure backup tank is full at pre-peak prices
  • Watch for IEA coordinated reserve release (typically reduces price $10-15/barrel)
  • Evaluate EV lease options — EV economics become compelling above $5.50/gallon

Months 3-6 (Resolution or Extended Crisis)

  • Price direction clearer — evaluate fixing vs floating energy costs
  • If blockade resolves: prices decline but remain elevated 25-40% for 6-12 months
  • If blockade extends: consider longer-term fuel efficiency investments
  • Reassess energy mix and supply chain for reduced oil dependency long-term

Shipping Industry Impact: How the Hormuz Closure Hits Global Trade

The Strait of Hormuz is not just an oil route — it carries a significant proportion of global manufactured goods and commodities, making a closure's economic impact far broader than energy costs alone.

🛢️Very Large Crude Carriers (VLCCs)

Each VLCC carries 2M barrels. 15-17 transit daily. Cape rerouting adds $1.26M per round voyage. Total fleet: ~800 VLCCs globally, of which 60-70 are in Gulf service at any time. Utilisation rate during blockade effectively doubles charter rates worldwide.

🧊LNG Tankers

Qatar LNG exports (77 million tonnes/year) require 3-5 tanker departures per day through Hormuz. No rerouting is possible (Qatar's only outlet). Full Qatar LNG halt removes 24% of global LNG trade — European gas prices spike immediately without the buffer of spot LNG supply.

📦Container Ships

Asian manufacturing goods (electronics, vehicles, textiles) to Middle East and Europe routed via Hormuz add 14-16 days via Cape. Additional fuel cost: $420-680K per Panamax vessel per voyage. Container spot rates for Asia-Europe expected to rise 80-150% at peak disruption.

Dry Bulk (Iron Ore, Coal, Grain)

Middle East imports 8% of global dry bulk trade for steel mills and food. Cape rerouting adds 12 days. Less critical than oil/LNG but contributes to global freight rate surge that affects prices of all manufactured goods.

The Second-Order Inflation Effect

When container freight rates surge (as they did by 10-20x during COVID supply chain disruption), the cost increase works its way into consumer goods prices with a 6-9 month lag. A $10,000/TEU freight rate increase (from $2,000 baseline to $12,000 at peak crisis) adds approximately $2-8 to the cost of every consumer electronic item, $40-100 to a car, and $15-30 to a standard wardrobe item. These "second order" inflation effects from a Hormuz blockade would persist for 12-18 months beyond the reopening of the strait — a key reason the IMF projects headline inflation rising 2-3 percentage points globally from the 2026 crisis.

Strait of Hormuz: What Transits Daily and Its Global Significance

CommodityDaily Volume% of Global TradePrimary DestinationAlternative Route?
Crude oil17-21M bbl/day~20% of global supplyAsia Pacific (65%), EU (20%), US (15%)No direct substitute; Suez too small for VLCCs
LNG3.5-4.2 bcf/day~30% of global LNGJapan, South Korea, China, India, EUQatar LNG has NO alternative transit route
Refined products3.8M bbl/day~18% of global tradeSouth/East Asia primarilyPartially via Red Sea (also insecure)
Petrochemicals4.2M tons/month~22% of global supplyEurope, Americas, Asia PacificAir freight for high-value; sea critical for bulk
NGL (NGLs)2.1M bbl/day~25% global NGLsAsia Pacific chemical plantsNo viable alternative at scale
Dry bulk (via risk)VariableModerateSouth Asian ports primarilySome rerouting possible via Cape

Source: IEA World Energy Outlook; EIA Hormuz Strait data (2024); Lloyd's List shipping intelligence. NGL = natural gas liquids (propane, butane, ethane). The Strait is 21 miles wide at its narrowest point; the shipping lanes are just 2 miles wide in each direction.

Strategic Petroleum Reserve Buffers: How Long Can Countries Last?

Country/GroupSPR Capacity (Mb)Current Est. FillDaily ConsumptionBuffer Days (Full)IEA Release Committed?
United States714 Mb~55% (393 Mb)20.1M bbl/day~20 days full / 11 days currentYes — 60M bbl pledged
IEA Member Total~4,200 Mb~65% (2,730 Mb)~46M bbl/day~91 days full / 59 days curr.Coordinated release active
Japan145 Mb~90% (130 Mb)3.2M bbl/day~45 daysYes — major contributor
South Korea97 Mb~88% (85 Mb)2.8M bbl/day~35 daysYes
China (SPR est.)~500 Mb est.~70% est.16.4M bbl/day~30 days est.Not IEA member; bilateral deals
India (SPR)~39 Mb~100%5.5M bbl/day~7 daysPartial participation
EU combined~650 Mb~80%~11.5M bbl/day~57 days fullIEA coordinated

Mb = million barrels. SPR fill estimates as of Q1 2026. The IEA 90-day stockholding obligation applies to all member states; actual release rates are managed to avoid market overcorrection. US SPR was significantly drawn down 2022-2023 and has been partially refilled since.

Note: SPR releases provide a buffer, not a solution. At typical release rates of 1-2M bbl/day globally coordinated, even a full IEA release covers only 2-3 months of a full Hormuz closure. After SPR exhaustion, market prices reflect the full supply shortfall — making early efficiency measures and demand reduction programmes critical policy levers. Countries with higher SPR buffers (Japan, South Korea) are better positioned to endure a prolonged closure without triggering severe domestic price spikes in the critical first 60 days of the crisis.

Disclaimer: This calculator provides educational estimates based on IEA supply disruption models, historical oil price transmission research, and publicly available geopolitical intelligence. Actual price movements will depend on military outcomes, strategic reserve deployments, OPEC spare capacity releases, and diplomatic developments that cannot be predicted. Fuel prices are highly localised and subject to taxes, subsidies, and retail margins not captured in this model. This is not financial, investment, or energy procurement advice. Always consult qualified professionals for hedging and risk management decisions.

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