Quart to Gallon Converter
Enter the value that you want to convert quart (qt) to gallon (gal) or gallon to quart.Also written as QT to GAL conversion.
1 quart = 0.2081685 gallon
Formula: gallon = quart value × 0.2081685
QT to GAL — quart to gallon
10 quart = 2.08169 gallon
Popular Volume Converters:
Quart to Gallon: The Essentials
What is Quart?
Quart (qt) is a unit of volume measurement. 1 quart is equal to 0.2081685 gallon.
The Gallon Explained
Gallon (gal) is a unit of volume measurement. 1 gallon is equal to 4.8037997 quart.
Volume Measurement Systems
Volume units are particularly confusing because the US and UK gallons differ (US gallon = 3.785 L, UK gallon = 4.546 L), as do their pints, cups, and fluid ounces. Cooking, fuel economy, beverage production, and pharmaceutical compounding all require precise volume conversions. Laboratory work uses milliliters and liters while US recipes specify cups, tablespoons, and fluid ounces.
quart to gallon metric conversion table
| 0.01 qt | = | 0.00208 gal |
| 0.1 qt | = | 0.02082 gal |
| 1 qt | = | 0.20817 gal |
| 2 qt | = | 0.41634 gal |
| 3 qt | = | 0.62451 gal |
| 4 qt | = | 0.83267 gal |
| 5 qt | = | 1.04084 gal |
| 6 qt | = | 1.24901 gal |
| 7 qt | = | 1.45718 gal |
| 8 qt | = | 1.66535 gal |
| 9 qt | = | 1.87352 gal |
| 10 qt | = | 2.08169 gal |
| 11 qt | = | 2.28985 gal |
| 12 qt | = | 2.49802 gal |
| 13 qt | = | 2.70619 gal |
| 14 qt | = | 2.91436 gal |
| 15 qt | = | 3.12253 gal |
| 16 qt | = | 3.33070 gal |
| 17 qt | = | 3.53887 gal |
| 18 qt | = | 3.74703 gal |
| 19 qt | = | 3.95520 gal |
| 20 qt | = | 4.16337 gal |
| 30 qt | = | 6.24506 gal |
| 40 qt | = | 8.32674 gal |
| 50 qt | = | 10.40843 gal |
| 60 qt | = | 12.49011 gal |
| 70 qt | = | 14.57180 gal |
| 80 qt | = | 16.65348 gal |
| 90 qt | = | 18.73517 gal |
| 100 qt | = | 20.81685 gal |
| 200 qt | = | 41.63371 gal |
| 300 qt | = | 62.45056 gal |
| 400 qt | = | 83.26742 gal |
| 500 qt | = | 104.08427 gal |
| 600 qt | = | 124.90113 gal |
| 700 qt | = | 145.71798 gal |
| 800 qt | = | 166.53484 gal |
| 900 qt | = | 187.35169 gal |
| 1000 qt | = | 208.16855 gal |
How to Convert QT to GAL (Quart to Gallon)?
We can convert quart to gallon by using an example.
Example:
Convert 20 Quart to Gallon?
We know 1 Quart = 0.2081685 gallon; 1 Gallon = 4.8037997 quart.
20 quart = ___gal
20 × 0.2081685 = 4.16337 gal (we know 1 quart = 0.2081685 gallon)
Answer:
20 quart = 4.16337 gallon
Quart to Gallon Conversion: The Quarter Relationship
The word "quart" literally means "quarter" — one quart is exactly ¼ of a gallon. To convert quarts to gallons, divide by 4 (or multiply by 0.25). This etymological connection makes the math intuitive: 4 quarts combine to form 1 gallon, just as 4 quarters combine to form 1 dollar.
- Take the volume measured in quarts.
- Divide by 4 to convert to gallons.
- Alternatively, multiply quarts by 0.25.
- Example: 10 quarts ÷ 4 = 2.5 gallons.
Quarts to Gallons Reference Table
Converting common quart amounts to gallons for automotive and kitchen use:
| Quart | Gallon |
|---|---|
| 1 quart | 0.25 gal |
| 2 quarts | 0.5 gal |
| 3 quarts | 0.75 gal |
| 4 quarts | 1 gal |
| 5 quarts | 1.25 gal |
| 6 quarts | 1.5 gal |
| 8 quarts | 2 gal |
| 12 quarts | 3 gal |
Solved Examples: Quart → Gallon
Question 1: Your car requires 5 quarts of motor oil. How many gallons is that?
Solution:
Gallons = quarts ÷ 4
= 5 ÷ 4
= 1.25 gallons
Answer: A 5-quart oil change uses 1.25 gallons of oil.
Question 2: You purchased 14 quarts of paint. How many gallons?
Solution:
Gallons = 14 ÷ 4
= 3.5 gallons
Answer: 14 quarts = 3.5 gallons of paint.
Question 3: A transmission holds 11 quarts of fluid. Express in gallons.
Solution:
Gallons = 11 ÷ 4
= 2.75 gallons
Answer: 11 quarts = 2.75 gallons (2 gallons + 3 quarts).
Practice Questions
Try solving these on your own to test your understanding:
- Convert 20 quarts to gallons. (Answer: 5 gallons)
- How many quarts in 3.5 gallons? (Answer: 14 quarts)
- A cooler holds 9 quarts. How many gallons? (Answer: 2.25 gallons)
- You need 2 gallons. How many quarts to buy? (Answer: 8 quarts)
- Convert 7 quarts to gallons. (Answer: 1.75 gallons)
Motor Oil and Automotive Fluids
Motor oil is sold in quart bottles and gallon jugs. Most 4-cylinder cars need 4-5 quarts (1-1.25 gallons), V6 engines need 5-6 quarts (1.25-1.5 gallons), and V8 engines may need 6-8 quarts (1.5-2 gallons). Buying a 5-quart jug is usually cheaper than five individual quarts. Transmission fluid, coolant, and brake fluid are also measured in quarts, making this conversion essential for DIY mechanics.
Etymology: Why "Quart" Means Quarter
The word "quart" derives from Latin "quartus" (fourth) via Old French "quarte." This naming tells you the conversion factor directly: a quart is a fourth of a gallon. Similarly, "gallon" may derive from Medieval Latin "galleta" (a pail). These etymological clues are built into the measurement system — the language itself reminds you of the math.
Key Takeaways
- 1 quart = 0.25 gallon = ¼ gallon.
- Divide quarts by 4 to get gallons.
- "Quart" = "quarter" — the name tells you the conversion.
- Most car oil changes need 4-6 quarts (1-1.5 gallons).
- Buying gallon jugs is usually cheaper per quart than individual bottles.
Quart to Gallon Conversion Formula
gallon = quart × 0.2081685
1 quart = 0.2081685 gallon
1 gallon = 4.8037997 quart
Reverse: quart = gallon × 4.8037997
Frequently Asked Questions
How many gallon are in 1 quart?
There are 0.2081685 gallon in 1 quart. To convert quart to gallon, multiply the value by 0.2081685.
How do I convert quart to gallon?
Multiply your quart value by 0.2081685 to get the equivalent in gallon. For example, 5 quart = 5 × 0.2081685 = 1.04084 gallon.
How do I convert gallon to quart?
Multiply your gallon value by 4.8037997 to get the equivalent in quart. Alternatively, divide by 0.2081685.
What is 10 quart in gallon?
10 quart is equal to 2.08169 gallon.
What is 100 quart in gallon?
100 quart is equal to 20.81685 gallon.