Gallon (US) to Quart (US) Converter
Volume · unit-converter
Convert Gallon (US) to Quart (US) with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Gallon (US) (gal)
To: Quart (US) (qt)
About Gallon (US)
The US liquid gallon is defined as 231 cubic inches (about 3.78541 liters). US recipes, fuel economy, and retail liquids typically use US gallons.
About Quart (US)
The US liquid quart is one quarter of a US gallon (about 0.94635 liters). US cooking and retail packaging use liquid quarts.
How to convert gallons (us) to quarts (us)
1 gallon (us) is equal to 3.99999999577325 quart (us):
1 gal = (3.78541178 L ÷ 0.946352946 L) qt = 3.99999999577325 qt
Each gallon (us) is defined as 3.78541178 L and each quart (us) as 0.946352946 L, so one gal equals 3.78541178 ÷ 0.946352946 qt = 3.99999999577325 qt.
Let V(gal) be the numeric value of the same volume measured in Gallon (US) (gal), and V(qt) the value in Quart (US) (qt). Then:
V(qt) = V(gal) × (3.78541178 / 0.946352946)
Equivalently, divide by how many gal fit into one qt (liters per qt divided by liters per gal):
V(qt) = V(gal) ÷ 0.25000000026417
Or: quart (us) = gallon (us) ÷ 0.25000000026417
Examples
Example #1: Convert 20 gal to quart (us)
20 gal = 20 gal × (3.78541178/0.946352946) qt = 79.9999999155 qt
20 gal = 20 gal ÷ 0.25000000026417 = 79.9999999155 qt
Example #2: Convert 50 gal to quart (us)
50 gal = 50 gal × (3.78541178/0.946352946) qt = 199.999999789 qt
50 gal = 50 gal ÷ 0.25000000026417 = 199.999999789 qt
Summary
To convert Gallon (US) to Quart (US), multiply the value in gal by the ratio of liters per gal divided by liters per qt. Equivalently: value_qt = value_gal × (3.78541178 / 0.946352946). Numerically, 1 gal equals 3.9999999957732473 qt.
Relationship context
Both units are US customary fluid / volume in this tool’s grouping. Conversions use fixed liter equivalents, so factors are consistent for cooking, engineering, and cross-checking labels. The factor from Gallon (US) to Quart (US) is 4.000000e+0 (1 gal = 3.9999999957732473 qt).
Conversion tables
| Gallon (US) (gal) | Quart (US) (qt) |
|---|---|
| 0.1 | 0.3999999996 |
| 1 | 3.9999999958 |
| 2 | 7.9999999916 |
| 3 | 11.9999999873 |
| 4 | 15.9999999831 |
| 5 | 19.9999999789 |
| 6 | 23.9999999746 |
| 7 | 27.9999999704 |
| 8 | 31.9999999662 |
| 9 | 35.999999962 |
| Gallon (US) (gal) | Quart (US) (qt) |
|---|---|
| 10 | 39.9999999577 |
| 20 | 79.9999999155 |
| 30 | 119.999999873 |
| 40 | 159.999999831 |
| 50 | 199.999999789 |
| 60 | 239.999999746 |
| 70 | 279.999999704 |
| 80 | 319.999999662 |
| 90 | 359.99999962 |
| 100 | 399.999999577 |