Question: 1 barrel oil how many kg?
Answer: Since average domestic crude oil weighs about 7.21 pounds per gallon, a barrel of oil weighs around 300 pounds or about 136 kilograms. The amount of energy that this amount equates to is dependent on the energy density of oil, and ends up making 1 BOE equal to 5.7 MTUs or 1.7 MWh.