Convert gallons to pounds and pounds to gallons. Density presets for water, milk, honey, oil, gasoline, and diesel with a weight-per-gallon reference table.
A gallon can weigh very different amounts depending on what is in it. Water is the usual baseline at about 8.345 pounds per US gallon, but honey is much heavier and gasoline is much lighter. That spread is why a gallon is easy to picture but not enough on its own when you are trying to plan a load or quote a shipment.
This converter lets you pick a liquid or enter a custom pounds-per-gallon value, then shows pounds, ounces, kilograms, and short tons alongside liters and cups for cross-checking. The 5-gallon and 55-gallon reference table is useful when the real job is sizing a drum, a container, or a shipment. It also makes it easier to sanity-check whether the total weight sounds right for the liquid you are actually handling.
Use it when you know the volume but need the actual weight for planning or transport. The density note stays visible so the number is easier to trust across fuel, kitchen, and logistics use cases.
Gallons are a volume unit, but shipping, fuel handling, and load limits are weight-based. This page keeps the density assumption visible so the result is useful for logistics, batching, and kitchen planning. It is especially helpful when the same gallon figure has to be compared with a truck limit or a recipe weight target, or when you need to sanity-check a quoted liquid weight.
pounds = gallons × lbs_per_gallon gallons = pounds ÷ lbs_per_gallon (Water: 1 gal ≈ 8.345 lbs)
Result: 390.5 lbs
55 gallons of diesel at 7.1 lbs/gal = 390.5 lbs. That's about 177.2 kg or 0.195 short tons.
The classic mnemonic says 1 pint = 1 pound, which gives 8 pints (= 1 gallon) = 8 pounds. In reality, 1 US pint of water weighs 1.043 lbs, making a gallon 8.345 lbs—about 4 % above the mnemonic. For rough estimates the rule works; for accurate shipping or recipe work, always use the precise density.
A gallon of olive oil weighs only 7.67 lbs, while a gallon of maple syrup hits 11.1 lbs. These differences matter in commercial kitchens, where ingredients are often purchased by the gallon but recipes call for pounds. Using the wrong shortcut can over- or under-portion by 30 % or more.
A tanker truck carrying 8,000 gallons of gasoline carries about 50,000 lbs (25 tons) of fuel. Compliance with highway weight limits requires converting volume to weight accurately—and accounting for temperature-dependent density changes using API standard correction tables.
About 8.345 pounds at room temperature. That is the standard baseline used for quick gallon-to-pound estimates, and it is the reference point for the rest of the liquid list.
About 8.6 pounds. Milk weighs a little more than water because of dissolved solids and fat content.
About 0.12 gallons, or a little under one-eighth of a gallon. It is the inverse of the familiar 8.345 pounds per gallon rule, so it is a good quick inverse check.
Yes, slightly. As temperature rises, liquids expand, so a gallon weighs a bit less, although the effect is small for everyday use.
About 41.7 lbs of water alone, plus around 2 lbs for the bucket. That is why filled buckets are much heavier than many people expect.
Honey is dense because it has a high sugar content and low water content. That makes it much heavier per gallon than water, which is why the same container can weigh dramatically more.