Quarts in a gallon
There are 4 quarts (qt) in 1 gallon (gal). Both quarts and gallons are part of the US customary and imperial systems of measurement. The unit quart gets its name from the Latin quartus, meaning "one-quarter," so the unit is based on being one-quarter of a gallon.
Quarts to gallons conversion
The following converter can be used to convert from quarts to gallons or gallons to quarts. Just enter a value in either quarts or gallons to convert between the two.
Quarts to gallons conversion explained
Converting between quarts and gallons requires us to remember the relationship between a quart and a gallon. Just remember that a quart is a quarter of a gallon, so:
1 quart = gallon
1 gallon = 4 quarts
To convert from quarts to gallons, we divide by 4, and to convert from gallons to quarts, we multiply by 4.
1. Convert 17 quarts to gallons:
17 qt ÷ 4 = 4.25 gal
2. Convert 12 gallons to quarts:
12 gal × 4 = 48 qt
Note that there are various definitions of a gallon, but in all these definitions, the relationship between a quart and a gallon (4 quarts: 1 gallon) stays the same. Just ensure that you are converting between quarts and gallons in the same system of measurement. If you are converting between US quarts and imperial gallons, then the relationship is not the same. Comparing the units to millilters (mL):
1 US gallon = 3785.411784 mL
1 US quart = 946.352948 mL
1 imperial gallon = 4546.09 mL
1 imperial quart = 1136.5225 mL
If you were converting from quarts to gallons in different systems, you would need to take the above relationships into consideration.