text: can some one please tell me how many barrels of oil (petroleum) make one metric tonne (1000kg)? it will really help me in my work. assume we are dealing with vehicle gasoline 1 m^3 =737.22 kg 1000 kg= 1/0.73722 m^3 {1000kg fresh water=1000m^3} assume barrel =40 gallons =40*4.545963 litres {1m^2=1000litres}  therefore, 1000kg =10^3/(0.7322*40*4.545963) =7.510768695 barrels   therefore, 1 tonne of vehicle gasoline is approximately 7.5 barrels  i hope that this helps