How many gallons is 5 lbs of water?
How many gallons is 5 lbs of water?
Answer
Water is taken at 20 °C (68 °F), where its density is 0.998 kg/L, so one US gallon of it weighs 8.33 lbs. Colder water is a touch denser, so the same weight of it takes slightly less room.
In imperial (UK) gallons of 4.54609 L instead of 3.785411784 L, 5 lbs of water would be 0.5 UK gallons.
How the volume of 5 lbs of water was worked out
A US gallon is exactly 3.785411784 liters and a pound is exactly 0.45359237 kilograms: the weight becomes kilograms, and the density turns kilograms into liters — and the liters become gallons.
5 lb × 0.45359237 ÷ (0.998 kg/L × 3.785411784)
≈0.6 US gallons
(zero point six gallons)
The density comes from FAO/INFOODS Density Database v2.0: liquid water at 20 °C; rounding to 1.00 kg/L is fine for everyday use.
The other way round: what one US gallon of this weighs
This page starts from a weight and answers in gallons. The opposite question — how much a given number of gallons weighs — is what the gallons to pounds calculator is for, and in metric units the same question is liters to kilograms. All of them read one density table, so their numbers agree.
For water the density is 0.998 kg/L, so 5 lbs is 0.6 gallons — and one US gallon of it weighs 8.33 lbs.
If the substance is not known in advance, start from how many gallons 5 lbs is — the same weight across every substance at once.
Related Calculations
See Also
- Gallons to Pounds - How much a gallon of water, milk, gasoline, diesel, oil or propane weighs in pounds — by density
- Pounds to Liters - How many liters a pound of water, milk, oil or propane takes — by density
- Kilograms to Liters - How many liters are in a kilogram of water, honey, gasoline, sand and other substances — by density
- Liters to Gallons - Convert Liters to US Gallons
- Lbs to Kg - Convert Pounds to Kilograms
<a href="https://calculat.io/en/volume/lbs-to-gal/5--water">5 lbs of water in gallons — 0.6 gallons at 68 °F - Calculatio</a>
How many gallons 5 lbs of each substance takes
| Substance | Volume of 5 lbs | One US gallon weighs | Density, kg/L |
|---|---|---|---|
| Milk | 0.58 gallons | 8.6 lbs | 1.03 |
| Propane | 1.18 gallons | 4.24 lbs | 0.5076 |
| Vegetable oil | 0.65 gallons | 7.68 lbs | 0.92 |
| Water | 0.6 gallons | 8.33 lbs | 0.998 |