How much does a barrel of oil weigh
A standard-size barrel holds 42 U.S. gallons. If one fills a standard-size barrel with petroleum oil that has a density of 881 kg/m3, then that barrel weighs about 300 pounds. If one fills the same barrel with crude oil with a density of 790 kg/m3, that barrel weighs about 275 pounds. In order to get a metric tonne of oil, one would need about 7.33 barrels of oil.