That depends on the type material you are referring to. Also, these are two different types of measurements. Gallons is a measure of volume but the other is weight or mass. Please edit your question to include more context or details.
A half gallon of water weighs approximately 4 pounds.
Pounds of what? Feathers, lead, milk . . . .?
eight and a half pounds
2
A gallon of milk weighs 8.6 pounds since 1 gallon is double the amount of a half gallon.
1 gallon of water weighs 8.3333 pounds. However, the weight depends upon the specific gravity of the liquid you are measuring.
how many pounds in a gallon
None, since there can be no conversion.A gallon is a measure of volume. A pound is a measure of mass. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
How many pounds of pecans do I have in a 55 gallon trash can
1/2 US gallon is two quarts.
there are eight half-pints in a half-gallon
At current prices, you would get around a half a gallon.