Conversion table
| US Gallons (gal) | Grams (g) |
|---|---|
| 0.25 gal | 946.35 |
| 0.5 gal | 1892.71 |
| 1 gal | 3785.41 |
| 2 gal | 7570.82 |
| 3 gal | 11356.24 |
| 5 gal | 18927.06 |
| 10 gal | 37854.12 |
| 20 gal | 75708.24 |
How to convert Gallons to Grams
grams = gallons × 3785.41 × densitywater density = 1 g/mL, so grams = gallons × 3785.41 · reverse: gallons = grams ÷ 3785.41
- gallons
- the volume in US gallons
- grams
- the weight of that much water
- 3785.41
- grams in one US gallon of water
This is the US liquid gallon of 3.78541 liters, not the larger imperial gallon of 4.546 liters used in the UK.
The weight assumes water. For another liquid, multiply by its density in g/mL: a gallon of gasoline (density about 0.74) weighs closer to 2800 g.
Frequently asked questions
How many grams are in a gallon of water?
A US gallon of water weighs 3785.41 g, which is about 3.79 kg.
How many grams is 2 gallons of water?
About 7570 g, or 7.57 kg.
Is this the US or imperial gallon?
The US liquid gallon of 3.78541 liters. An imperial gallon is larger, so it holds about 4546 g of water.
How many gallons is 5000 grams of water?
Roughly 1.32 US gallons.
Does the liquid change the weight?
Yes. Water is the reference at 1 g/mL. Fuels weigh less per gallon and syrups weigh more, in line with their density.