Convert Imperial quarts to Imperial gallons
1 imperial quart is 0.25 gal (UK). One imperial quart is exactly 0.25 imperial gallons.
One imperial quart is 0.25 imperial gallons. To convert imperial quarts to imperial gallons, multiply by 0.25; to go the other way, divide by 0.25 or multiply by 4. The factor is exact rather than rounded: it follows from NIST Handbook 130. A quarter of an imperial gallon, 1.1365225 liters exactly.
Factor checked against the defining standard · How we check
- Imperial quarts × 0.25
1 * 0.250.25 gal (UK)
1 imperial quart in every volume unit
| Unit | Value | Exact factor |
|---|---|---|
| US teaspoons | 230.5823857 tsp | × 230.582385697 |
| US tablespoons | 76.86079523 tbsp | × 76.8607952323 |
| US fluid ounces | 38.43039762 fl oz | × 38.4303976162 |
| US cups | 4.803799702 cup | × 4.80379970202 |
| US pints | 2.401899851 pt | × 2.40189985101 |
| US quarts | 1.200949926 qt | × 1.2009499255 |
| US gallons | 0.3002374814 gal | × 0.300237481376 |
| milliliters | 1,136.5225 ml | × 1,136.5225 |
| liters | 1.1365225 L | × 1.1365225 |
| imperial gallons | 0.25 gal (UK) | × 0.25 |
| imperial quarts (as entered) | 1 qt (UK) | — |
| imperial pints | 2 pt (UK) | × 2 |
| imperial fluid ounces | 40 fl oz (UK) | × 40 |
| imperial gills | 8 gi (UK) | × 8 |
| cubic millimetres | 1,136,522.5 mm³ | × 1,136,522.5 |
| cubic centimetres | 1,136.5225 cm³ | × 1,136.5225 |
| cubic inches | 69.3548582 in³ | × 69.3548581979 |
| cubic feet | 0.04013591331 ft³ | × 0.040135913309 |
| cubic yards | 0.001486515308 yd³ | × 0.00148651530774 |
| cubic metres | 0.0011365225 m³ | × 0.0011365225 |
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 imperial quarts to imperial gallons? The converter and the working
- 1.Take the measurement in imperial quarts.
- 2.Multiply by 0.25 — that is how many imperial gallons fit in one imperial quart.
- 3.To go back the other way, divide by 0.25, or multiply by 4.
Worked example: 25 imperial quarts to imperial gallons
- Formula
- qt (UK) × 0.25 = gal (UK)
- Arithmetic
- 25 × 0.25 = 6.25 gal (UK)
- Answer
- 25 qt (UK) = 6.25 gal (UK)
The factor is exact, so this figure is exact too — only the display is rounded.
Imperial quarts to imperial gallons conversion table
| Imperial quarts | Imperial gallons |
|---|---|
| 1 qt (UK) | 0.25 gal (UK) |
| 2 qt (UK) | 0.5 gal (UK) |
| 3 qt (UK) | 0.75 gal (UK) |
| 4 qt (UK) | 1 gal (UK) |
| 5 qt (UK) | 1.25 gal (UK) |
| 6 qt (UK) | 1.5 gal (UK) |
| 7 qt (UK) | 1.75 gal (UK) |
| 8 qt (UK) | 2 gal (UK) |
| 9 qt (UK) | 2.25 gal (UK) |
| 10 qt (UK) | 2.5 gal (UK) |
| 12 qt (UK) | 3 gal (UK) |
| 15 qt (UK) | 3.75 gal (UK) |
| 20 qt (UK) | 5 gal (UK) |
| 25 qt (UK) | 6.25 gal (UK) |
| 50 qt (UK) | 12.5 gal (UK) |
| 100 qt (UK) | 25 gal (UK) |
| 200 qt (UK) | 50 gal (UK) |
| 300 qt (UK) | 75 gal (UK) |
| 500 qt (UK) | 125 gal (UK) |
| 1000 qt (UK) | 250 gal (UK) |
| 2000 qt (UK) | 500 gal (UK) |
| 5000 qt (UK) | 1,250 gal (UK) |
| 10000 qt (UK) | 2,500 gal (UK) |
What is an imperial quart?
A quarter of an imperial gallon, 1.1365225 liters exactly. It is larger than a US quart by the same fifth that separates the two gallons.
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 an imperial quart?
One imperial quart is 0.25 imperial gallons, exactly. Going the other way, one imperial gallon is 4 imperial 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 an imperial quart.
Cite this page
- APA
- Rule Calculator. (2026). Convert Imperial quarts to imperial gallons. Rule Calculator. https://rulecalculators.com/convert/imperial-quart-to-imperial-gallon
- MLA
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- Chicago
- Rule Calculator. "Convert Imperial quarts to imperial gallons." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/imperial-quart-to-imperial-gallon.
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Questions people actually ask
- How many imperial gallons are in an imperial quart?
- 0.25. 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 imperial quarts?
- Divide by 0.25, or multiply by 4 — they are the same operation.
Other volume conversions
Imperial gallons to imperial quarts — the same conversion the other way.