UK Quarts to US Gallons (imp qt to gal) Converter
1 UK quart (imp qt) = 0.300237 US gallons (gal). To convert UK quarts to US gallons, multiply by 0.300237: 25 imp qt × 0.300237 = 7.50594 gal.
Quick facts
- 1 imp qt = 0.300237 gal
- 1 gal = 3.3307 imp qt
- Formula: gal = imp qt × 0.300237
- Quick estimate: multiply by about 0.3
How to convert UK quarts to US gallons
- Start with your measurement in UK quarts.
- Multiply it by 0.300237 (the number of US gallons in one UK quart).
- Round the answer to a sensible number of decimal places.
Worked example: 25 imp qt × 0.300237 = 7.50594 gal.
To convert US gallons back to UK quarts, multiply by 3.3307, or divide by 0.300237.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
UK Quarts to US Gallons conversion table
| UK Quarts [imp qt] | US Gallons [gal] |
|---|---|
| 0.01 imp qt | 0.0030023748 gal |
| 0.1 imp qt | 0.0300237481 gal |
| 1 imp qt | 0.3002374814 gal |
| 2 imp qt | 0.6004749628 gal |
| 3 imp qt | 0.9007124441 gal |
| 5 imp qt | 1.5011874069 gal |
| 10 imp qt | 3.0023748138 gal |
| 20 imp qt | 6.0047496275 gal |
| 50 imp qt | 15.0118740688 gal |
| 100 imp qt | 30.0237481376 gal |
| 1000 imp qt | 300.2374813762 gal |
imp qt to gal chart from 1 to 100
- 1 imp qt 0.300237 gal
- 2 imp qt 0.600475 gal
- 3 imp qt 0.900712 gal
- 4 imp qt 1.20095 gal
- 5 imp qt 1.50119 gal
- 6 imp qt 1.80142 gal
- 7 imp qt 2.10166 gal
- 8 imp qt 2.4019 gal
- 9 imp qt 2.70214 gal
- 10 imp qt 3.00237 gal
- 11 imp qt 3.30261 gal
- 12 imp qt 3.60285 gal
- 13 imp qt 3.90309 gal
- 14 imp qt 4.20332 gal
- 15 imp qt 4.50356 gal
- 16 imp qt 4.8038 gal
- 17 imp qt 5.10404 gal
- 18 imp qt 5.40427 gal
- 19 imp qt 5.70451 gal
- 20 imp qt 6.00475 gal
- 25 imp qt 7.50594 gal
- 30 imp qt 9.00712 gal
- 35 imp qt 10.5083 gal
- 40 imp qt 12.0095 gal
- 45 imp qt 13.5107 gal
- 50 imp qt 15.0119 gal
- 55 imp qt 16.5131 gal
- 60 imp qt 18.0142 gal
- 65 imp qt 19.5154 gal
- 70 imp qt 21.0166 gal
- 75 imp qt 22.5178 gal
- 80 imp qt 24.019 gal
- 85 imp qt 25.5202 gal
- 90 imp qt 27.0214 gal
- 95 imp qt 28.5226 gal
- 100 imp qt 30.0237 gal
US Gallons to UK Quarts conversion table
| US Gallons [gal] | UK Quarts [imp qt] |
|---|---|
| 0.01 gal | 0.0333069674 imp qt |
| 0.1 gal | 0.3330696739 imp qt |
| 1 gal | 3.3306967385 imp qt |
| 2 gal | 6.661393477 imp qt |
| 3 gal | 9.9920902155 imp qt |
| 5 gal | 16.6534836926 imp qt |
| 10 gal | 33.3069673852 imp qt |
| 20 gal | 66.6139347703 imp qt |
| 50 gal | 166.5348369258 imp qt |
| 100 gal | 333.0696738516 imp qt |
| 1000 gal | 3330.696738516 imp qt |
UK Quarts vs US Gallons
| UK Quart | US Gallon | |
|---|---|---|
| Symbol | imp qt | gal |
| Equals | 1 imp qt = 0.300237 gal | 1 gal = 3.3307 imp qt |
What is a UK quart?
A UK imperial unit equal to 2 imperial pints. Found in older UK and Canadian recipes and measuring jugs.
What is a US gallon?
A US customary unit equal to 4 quarts. Used in the US for fuel, milk, and paint.
When You Need to Convert UK Quarts to US Gallons
UK quarts are used mainly in the UK (pub pints, fuel economy in mpg) and older Canadian recipes, while US gallons are used mainly in the United States. This conversion bridges the US customary and metric systems, so it comes up whenever a figure crosses the US border with Canada or the Atlantic with the UK: product specifications, travel, recipes, school work and trade.
How big is 1 imp qt compared with 1 gal?
1 imp qt is only 0.300237 of 1 gal: you need 3.3307 UK quarts to make 1 gal, so the number gets smaller when you convert.
UK Quarts to US Gallons without a calculator
- In your head: multiply by 0.3 (about 0.079% off). 2 imp qt × 0.3 ≈ 0.6 gal.
- Or divide: divide by 3.3 (within 0.92%), which is often easier than multiplying by a small decimal.
Real-world imp qt to gal examples
| Example | UK Quarts | US Gallons |
|---|---|---|
| An older recipe measure | 1 imp qt | 0.300237 gal |
| Half an imperial gallon | 2 imp qt | 0.600475 gal |
| A car fuel tank | 49.9605 imp qt | 15 gal |
| A gallon of milk | 3.3307 imp qt | 1 gal |
| A hot-water heater | 166.535 imp qt | 50 gal |
How exact is the imp qt to gal factor?
The factor is exact by definition, so any error comes only from rounding. Round the final answer, not the factor, and match the precision of the number you started with.
Mistakes to avoid
- US and imperial (UK) measures share names but not sizes. Check which one a recipe, label or fuel figure uses before converting.
Background on UK quarts and US gallons
The US gallon is the old English wine gallon of exactly 231 cubic inches.
What people convert next
Next, you might want us quarts to us gallons, uk quarts to uk gallons, us gallons to liters and us gallons to uk gallons. The full volume converter lists every unit.
On pakmath.com, the percentage calculator is a useful next step, as is the scientific calculator; our sister site Adzita has a gas mileage calculator.
Frequently asked questions
How many US gallons are in a UK quart?
There are 0.300237 US gallons in 1 UK quart (1 imp qt = 0.3002374814 gal).
How many UK quarts are in a US gallon?
There are 3.3307 UK quarts in 1 US gallon (1 gal = 3.3306967385 imp qt).
How do I convert UK quarts to US gallons?
Multiply the number of UK quarts by 0.300237. For example, 10 imp qt × 0.300237 = 3.00237 gal. To convert back, multiply by 3.3307.
What is 10 imp qt in US gallons?
10 imp qt = 3.00237 gal.
What is 100 imp qt in US gallons?
100 imp qt = 30.0237 gal.
How accurate is this UK quart to US gallon converter?
Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.
What is an easy way to convert UK quarts to US gallons?
In your head: multiply by 0.3 (about 0.079% off). 2 imp qt × 0.3 ≈ 0.6 gal.
How many US gallons is 2 imp qt (half an imperial gallon)?
2 imp qt = 0.600475 gal.
How many UK quarts is a hot-water heater (50 gal)?
50 gal = 166.535 imp qt.
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