how much weight per gallon of gas

A gallon of gasoline weighs about 6 to 6.3 pounds in typical conditions, with small changes based on temperature and fuel blend.

Quick Scoop

• Typical U.S. gasoline: about 6.1 pounds per gallon.

• Common practical estimate: about 6.0 to 6.3 pounds per gallon.

• Why it varies: temperature, octane, and additives can shift the weight a little.

Useful Context

If you’re calculating vehicle payload or fuel tank weight, a full 15-gallon tank of gas would weigh roughly 90 to 95 pounds.

For comparison, gasoline is much lighter than water, which is why the same volume weighs less.

Bottom Line

For most everyday uses, you can safely remember: 1 gallon of gas = about 6.1 pounds.