Brent Crude Oil Price Per Barrel Today

What One Barrel of Brent Crude Actually Is

A barrel of oil is a fixed volume, not a physical container. The trading standard is 42 US gallons, equal to 158.987 litres or roughly 35 imperial gallons. The figure is a historical accident: in the 1860s Pennsylvania oil fields, producers shipped crude in repurposed 40-gallon whiskey barrels and added two gallons of headroom to cover leakage and evaporation in transit. The Petroleum Producers Association formalised the 42-gallon barrel in 1872, and every crude benchmark quoted today still uses it.

Brent futures traded on ICE are contracts for 1,000 barrels each, so a one-dollar move in the per-barrel price changes the value of a single contract by 1,000 dollars. The headline number you see quoted in the news is the front-month contract price, meaning the nearest delivery month, which is the most actively traded and the closest proxy for the current physical market.

Barrel Conversions at a Glance

• 1 barrel = 42 US gallons = 158.987 litres = 34.97 imperial gallons
• 1 barrel ≈ 0.136 metric tonnes for Brent-grade light sweet crude
• 1 metric tonne ≈ 7.5 barrels of Brent (varies by crude density)
• 1 cubic metre = 6.29 barrels

Because tonne-to-barrel conversion depends on density, it is not a fixed constant across crude grades. Heavier crudes such as Maya or Urals yield fewer barrels per tonne than light grades like Brent. This is one reason the barrel, a pure volume unit, remains the trading standard even in metric markets.

What Moves the Per-Barrel Price

The per-barrel price of Brent is set by the balance between global supply and demand, and by expectations about that balance months ahead. On the supply side the main variables are OPEC+ production quotas, US shale output, unplanned outages and sanctions. On the demand side they are global industrial activity, transport fuel consumption and seasonal heating and driving cycles.

Two financial factors matter almost as much. The first is the US dollar, since crude is priced in dollars worldwide and a stronger dollar makes each barrel more expensive in every other currency. The second is the shape of the futures curve: when nearby contracts trade above later ones, the prompt physical market is tight. A fuller walkthrough is on the why oil prices change page.