Amid fluctuating gas prices caused by the ongoing Iran war, ABC News has introduced a gas calculator for drivers to estimate fuel costs. Following the onset of conflict in February, oil prices have surged over $100 a barrel due to disruptions in the Strait of Hormuz. Although a ceasefire has been agreed, negotiations are ongoing, with recent tensions escalating. The average cost for regular unleaded gas peaked at $4.50 on May 11 but has recently decreased to $3.79. Users can input their vehicle details to find the cost of filling their tanks.

Amid fluctuating gas prices tied to the Iran war, here's a nifty calculator to figure out the cost of fueling up

Just punch in your vehicle's make and model and see how much you'll pay.

ByBill Hutchinson, Lindsey Feingold, and Maggie Green

July 8, 2026, 8:01 AM

With fuel prices nationwide going up and down amid the ongoing war in Iran, ABC News is launching a gas calculator to help drivers estimate the cost of filling up their tanks.

Since the war began in February, oil prices have topped $100 a barrel due to ongoing disruptions and closures of shipping traffic in the Strait of Hormuz, the critical maritime passage between the Persian Gulf and the Gulf of Oman for oil and international trade.

The U.S. and Iran have signed a memorandum of understanding on a ceasefire that requires the opening of the Strait of Hormuz and an end to a U.S. naval blockade of Iranian ports.

Negotiations on a permanent peace plan have struggled to get underway, and in recent days, a fresh round of tit-for-tat strikes has occurred between the U.S. and Iran over the strategic waterway.

A customer pumps gas into his car at a Chevron station, May 4, 2026 in Los Angeles.

Justin Sullivan/Getty Images

According to the U.S. Energy Information Administration, the average cost of regular, unleaded gas climbed to $4.50 in the week ending May 11 -- the highest it had been since mid-July 2022. The price has since fallen to as low as $3.79 in recent days.

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To find out how much it costs to fill up, type in the year, make, and model of your vehicle, and the city you're filling up in to calculate the price from a quarter tank to a full tank of gas.

ABC News' Matthew Glasser contributed to this report.

Amid fluctuating gas prices tied to the Iran war, here's a nifty calculator to figure out the cost of fueling up

Amid fluctuating gas prices tied to the Iran war, here's a nifty calculator to figure out the cost of fueling up

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