US Quarts to US Gallons (qt to gal)
1 US quart equals 0.25 US gallons exactly.
How to convert US quarts to US gallons
To convert US quarts to US gallons, multiply the number of US quarts by 0.25. This factor is exact. To go the other way, multiply US gallons by 4.
US gallons = US quarts × 0.25
Example: 10 US quarts = 2.5 US gallons.
Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.
About these units
US Quart (qt)
One quarter of a US gallon, 0.946353 L (32 US fluid ounces).
Quart is a word about fractions. It comes from Latin quartus, meaning one fourth, by way of French, and it was always meant to be a quarter of a gallon. Since gallons differed over the centuries, quarts did too. The US liquid quart is 57.75 cubic inches, about 0.9464 liters, while the imperial quart is a quarter of the 4.54609-liter imperial gallon, about 1.1365 liters. Canadian French even uses pinte for the imperial quart.
Older English trade also produced odd cousins. The Winchester quart was a big bottle holding two imperial quarts, later metricated to 2.5 liters, and the reputed quart of about 0.758 liters was once a standard British wine bottle size. In the United States a quart still means a carton of milk or cream or a tub of ice cream. Americans also use a separate dry quart, about 1.101 liters, for berries, so a quart of strawberries is larger than a quart of milk.
1 US quart = 0.946352946 liters (exactly).
Sources: Wikipedia: Quart; Wikipedia: Gallon; NIST SP 811, Appendix B.8: conversion factors for volume
US Gallon (gal)
Exactly 231 cubic inches or 3.785411784 liters (128 US fluid ounces). About 17% smaller than the imperial gallon.
The US gallon is a survivor of English wine trade. Around 1706, a statute in Queen Anne's reign fixed the wine gallon at exactly 231 cubic inches, settling confusion among the competing gallons for wine, ale and corn. British colonies in North America used that wine gallon, and in 1824 Britain replaced all its gallons with a new imperial one while the United States kept the old measure. It was adopted as the legal US standard in 1836 and is still defined as exactly 231 cubic inches, or 3.785411784 liters.
That makes the US gallon about 17 percent smaller than the imperial gallon, a difference that explains why American and British fuel-economy figures cannot be compared directly. Everyday uses are milk jugs, paint cans and gasoline pumps. One gallon divides evenly into four quarts, eight pints, sixteen cups and 128 fluid ounces. A gallon of water weighs a little over 8 pounds, an easy figure to remember when loading a car with water jugs.
1 US gallon = 3.785411784 liters (exactly).
Sources: Wikipedia: Gallon; NIST SP 811, Appendix B.8: conversion factors for volume
Related conversions
- US gallons to US quarts (reverse)
- US quarts to liters
- US quarts to milliliters
- US quarts to US cups
- US quarts to US fluid ounces
- US quarts to cubic meters
- US quarts to cubic centimeters
- US quarts to US pints
- US quarts to US tablespoons
- US quarts to US teaspoons
- US quarts to metric cups
- US quarts to metric tablespoons
- US quarts to metric teaspoons
- Liters to US gallons
- Milliliters to US gallons
- US cups to US gallons
- US fluid ounces to US gallons
- Cubic meters to US gallons
- Cubic centimeters to US gallons
- US pints to US gallons
- US tablespoons to US gallons
- US teaspoons to US gallons
- Metric cups to US gallons
- Metric tablespoons to US gallons
- Metric teaspoons to US gallons
See all volume units.