Quart (US) to Gallon (US) (US qt to US gal)
Result
0.25 Gallon (US)
Formula
US gal = US qt × 0.25
1 US qt = 0.25 US gal, and 1 US gal = 4 US qt.
The litre is exactly 1 dm³ (0.001 m³). The US gallon is defined as 231 cubic inches, which makes it exactly 3.785411784 L; quarts, pints, cups and fluid ounces are fixed fractions of it.
Worked examples
- 1 US qt × 0.25 = 0.25 US gal
- 10 US qt × 0.25 = 2.5 US gal
- 100 US qt × 0.25 = 25 US gal
Common mistakes
- US and UK (imperial) measures share names but not sizes: the imperial gallon is 4.54609 L (20% larger), the imperial pint 568 mL and the imperial fluid ounce 28.41 mL.
- This converter uses US customary volumes. A US cup is 236.59 mL, a metric cup 250 mL, and US nutrition labels round a cup to 240 mL.
- US dry measures (dry pint, bushel) are a separate system and are not the same as liquid pints.
Quart (US) to Gallon (US) table
| Quart (US) (US qt) | Gallon (US) (US gal) |
|---|---|
| 1 | 0.25 |
| 2 | 0.5 |
| 5 | 1.25 |
| 10 | 2.5 |
| 20 | 5 |
| 50 | 12.5 |
| 100 | 25 |
| 1,000 | 250 |
The units
- Quart (US) (US qt)
- 1 Quart (US) = 0.000946352946 Cubic Meter.
- Gallon (US) (US gal)
- The US liquid gallon: 231 cubic inches, exactly 3.785411784 L.
Sources for these factors
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
- 21 CFR 101.9 (nutrition labeling: household measure equivalents) — U.S. FDA / eCFR
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy