How to Convert US quarts to US gallons (qt to gal)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert us quarts into us gallons by hand, with examples and a quick-reference table.
The conversion
To convert us quarts to us gallons, multiply the value by 0.2500001321. To go the other way, divide by the same number (or multiply by 3.9999978866). For a quick estimate, multiply by about 0.25.
US gallons = us quarts × 0.2500001321
Worked examples
- 3 qt = 0.75 gal
- 12.5 qt = 3.125 gal
- 75 qt = 18.75 gal
US quarts to US gallons table
| US quarts | US gallons |
|---|---|
| 1 qt | 0.25 gal |
| 2 qt | 0.5 gal |
| 5 qt | 1.25 gal |
| 10 qt | 2.5 gal |
| 20 qt | 5 gal |
| 25 qt | 6.25 gal |
| 50 qt | 12.5 gal |
| 100 qt | 25 gal |
| 250 qt | 62.5 gal |
| 500 qt | 125.0001 gal |
| 1,000 qt | 250.0001 gal |
Common questions
Is qt to gal exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the US gallons to US quarts converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Background
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
For any value, use the US quarts to US gallons Converter or browse all volume converters.
Run your own numbers: US quarts to US gallons Converter