A kind of fuel · also called Petrol, Gas

About
Gasoline is a common flammable liquid fuel refined from crude oil that is noticeably lighter than water.
Gasoline has a typical density of about 6.2 pounds per US gallon (0.74 g/mL). Because it is less dense than water, it quickly floats to the surface rather than sinking. It is also lighter than related liquid petroleum fuels, such as diesel and kerosene, which take up less volume for the same mass.
From Wikipedia
Gasoline or petrol is a petrochemical product, a transparent, yellowish and flammable liquid normally used as a fuel for spark-ignited internal combustion engines. It is chemically composed of organic compounds derived from the fractional distillation of petroleum and later chemically enhanced with gasoline additives.
Read more on Wikipedia →Text from Wikipedia’s “Gasoline” article, CC BY-SA 4.0.
One cup weighs
6.18 oz (175 g)
Quick answer
One US cup of gasoline weighs about 6.2 ounces (175 g). That makes it roughly one-quarter lighter than a cup of water, which weighs about 8.3 ounces (237 g).
Typical figures, the same ones every comparison on the site uses; real ones vary.
More like gasoline
Compare it
Next to anything: a person, a car, another fuel.