Convert US quarts to Imperial gallons
1 US quart is 0.21 gal (UK). One US quart is exactly 0.208168546157 imperial gallons.
One US quart is 0.20816855 imperial gallons. To convert US quarts to imperial gallons, multiply by 0.20816855; to go the other way, divide by 0.20816855 or multiply by 4.8037997. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 130. Two pints, about 946 ml, and close enough to a liter that recipes swap them.
Factor checked against the defining standard · How we check
- US quarts × 0.20816855
1 * 0.20816860.208 gal (UK)
1 US quart in every volume unit
| Unit | Value | Exact factor |
|---|---|---|
| US teaspoons | 192 tsp | × 192 |
| US tablespoons | 64 tbsp | × 64 |
| US fluid ounces | 32 fl oz | × 32 |
| US cups | 4 cup | × 4 |
| US pints | 2 pt | × 2 |
| US quarts (as entered) | 1 qt | — |
| US gallons | 0.25 gal | × 0.25 |
| milliliters | 946.352946 ml | × 946.352946 |
| liters | 0.946352946 L | × 0.946352946 |
| imperial gallons | 0.2081685462 gal (UK) | × 0.208168546157 |
| imperial quarts | 0.8326741846 qt (UK) | × 0.832674184629 |
| imperial pints | 1.665348369 pt (UK) | × 1.66534836926 |
| imperial fluid ounces | 33.30696739 fl oz (UK) | × 33.3069673852 |
| imperial gills | 6.661393477 gi (UK) | × 6.66139347703 |
| cubic millimetres | 946,352.946 mm³ | × 946,352.946 |
| cubic centimetres | 946.352946 cm³ | × 946.352946 |
| cubic inches | 57.75 in³ | × 57.75 |
| cubic feet | 0.03342013889 ft³ | × 0.0334201388889 |
| cubic yards | 0.001237782922 yd³ | × 0.00123778292181 |
| cubic metres | 0.000946352946 m³ | × 0.000946352946 |
Factors are entered by hand from NIST Handbook 130 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert US quarts to imperial gallons? The converter and the working
- 1.Take the measurement in US quarts.
- 2.Multiply by 0.20816855 — that is how many imperial gallons fit in one US quart.
- 3.To go back the other way, divide by 0.20816855, or multiply by 4.8037997.
Worked example: 25 US quarts to imperial gallons
- Formula
- qt × 0.20816855 = gal (UK)
- Arithmetic
- 25 × 0.20816855 = 5.2 gal (UK)
- Answer
- 25 qt = 5.2 gal (UK)
The factor is rounded for display; the figure above is computed from the full value.
US quarts to imperial gallons conversion table
| US quarts | Imperial gallons |
|---|---|
| 1 qt | 0.21 gal (UK) |
| 2 qt | 0.42 gal (UK) |
| 3 qt | 0.62 gal (UK) |
| 4 qt | 0.83 gal (UK) |
| 5 qt | 1.04 gal (UK) |
| 6 qt | 1.25 gal (UK) |
| 7 qt | 1.46 gal (UK) |
| 8 qt | 1.67 gal (UK) |
| 9 qt | 1.87 gal (UK) |
| 10 qt | 2.08 gal (UK) |
| 12 qt | 2.5 gal (UK) |
| 15 qt | 3.12 gal (UK) |
| 20 qt | 4.16 gal (UK) |
| 25 qt | 5.2 gal (UK) |
| 50 qt | 10.41 gal (UK) |
| 100 qt | 20.82 gal (UK) |
| 200 qt | 41.63 gal (UK) |
| 300 qt | 62.45 gal (UK) |
| 500 qt | 104.08 gal (UK) |
| 1000 qt | 208.17 gal (UK) |
| 2000 qt | 416.34 gal (UK) |
| 5000 qt | 1,040.84 gal (UK) |
| 10000 qt | 2,081.69 gal (UK) |
What is a US quart?
Two pints, about 946 ml, and close enough to a liter that recipes swap them.
What is an imperial gallon?
Exactly 4.54609 liters since 1985, and the reason UK and US fuel economy figures cannot be compared: it is 20% larger than the US gallon, so 40 mpg in Britain is about 33 mpg in America on the same car.
How many imperial gallons are in a US quart?
One US quart is 0.20816855 imperial gallons. Going the other way, one imperial gallon is 4.8037997 US quarts. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every volume unit here
The whole group — 20 units with their symbols and the size of each one in liters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a US quart.
Cite this page
- APA
- Rule Calculator. (2026). Convert US quarts to imperial gallons. Rule Calculator. https://rulecalculators.com/convert/quart-to-imperial-gallon
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- Chicago
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Questions people actually ask
- How many imperial gallons are in a US quart?
- 0.20816855. Exactly 4.54609 liters since 1985, and the reason UK and US fuel economy figures cannot be compared: it is 20% larger than the US gallon, so 40 mpg in Britain is about 33 mpg in America on the same car.
- How do I convert imperial gallons back to US quarts?
- Divide by 0.20816855, or multiply by 4.8037997 — they are the same operation.
Other volume conversions
Imperial gallons to US quarts — the same conversion the other way.