How much does 1 gallon of diesel weigh?
How much does 1 gallon of diesel weigh?
Answer
The density of diesel is 0.834 kg/L (at 15 °C, summer grade; winter and arctic grades are lighter), so one US gallon of it weighs 6.96 lbs.
In imperial (UK) gallons of 4.54609 L instead of 3.785411784 L, 1 UK gallon of diesel would weigh 8.36 lbs.
How the weight of 1 gallon of diesel was worked out
A US gallon is exactly 3.785411784 liters and a pound is exactly 0.45359237 kilograms, so the density in kilograms per liter turns into pounds per gallon by multiplying by the first and dividing by the second.
1 gal × 0.834 kg/L × 3.785411784 ÷ 0.45359237
≈6.96 lbs
(six point nine six lbs)
The density comes from GOST 32511-2013 (Russian fuel standard): at 15 °C, summer grade; winter and arctic grades are lighter.
Why the same gallon weighs differently
A gallon measures volume, a pound measures weight, and density is what ties them together: how many pounds one US gallon of this particular substance comes to. Water is the everyday reference at 8.33 lbs per gallon, and everything else sits above or below it.
Across this page the spread is wide: one US gallon of propane weighs 4.24 lbs, one US gallon of milk 8.6 lbs — at the very same volume.
If the substance is not known in advance, start from how many pounds 1 gallon is — the same volume across every substance at once.
The other way round: how many gallons a weight fills
This page starts from a volume and answers in pounds. The opposite question — how many gallons a given weight comes to — is what the pounds to gallons calculator is for, and in metric units the same question is kilograms to liters. All of them read one density table, so their numbers agree.
For diesel that means 1 gallon weighs 6.96 lbs here, and one pound of it fills 0.14 gallons there.
Related Calculations
See Also
- Pounds to Gallons - How many gallons a pound of water, milk, oil or propane takes — by density
- Liters to Pounds - How much a liter of water, gasoline or propane weighs in pounds — by density
- Liters to Kilograms - How many kilograms are in a liter of water, honey, gasoline, sand and other substances — by density
- Gallons to Liters - Convert US Gallons to Liters
- Lbs to Kg - Convert Pounds to Kilograms

How much 1 gallon of each substance weighs
| Substance | Weight of 1 gallon | Density, kg/L |
|---|---|---|
| Diesel | 6.96 lbs | 0.834 |
| Gasoline | 6.18 lbs | 0.74 |
| Milk | 8.6 lbs | 1.03 |
| Propane | 4.24 lbs | 0.5076 |
| Vegetable oil | 7.68 lbs | 0.92 |
| Water | 8.33 lbs | 0.998 |