Imperial quart to US liquid gallon
imp qt
gal
Conversion History
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|---|---|---|
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Quick Reference Table (Imperial quart to US liquid gallon)
| Imperial quart (imp qt) | US liquid gallon (gal) |
|---|---|
| 0.5 | 0.15011874068748474103 |
| 1 | 0.30023748137496948205 |
| 2 | 0.6004749627499389641 |
| 4 | 1.20094992549987792821 |
| 8 | 2.40189985099975585642 |
About Imperial quart (imp qt)
The imperial quart is a unit of volume equal to one quarter of an imperial gallon, approximately 1.136 liters. It is used in the UK and Commonwealth countries for liquid measurement, though everyday use has declined since metrication. An imperial quart is larger than both the US liquid quart (946 mL) and just slightly larger than one liter. Historically, motor oil was sold in imperial quart cans in the UK; today, liter bottles have replaced them.
Pre-metrication UK motor oil was sold in imperial quart cans. An imperial quart is just over two UK pints.
About US liquid gallon (gal)
The US liquid gallon is a unit of volume equal to 4 quarts, 8 pints, or 128 US fluid ounces, approximately 3.785 liters. It is the primary large liquid volume unit in the United States, used for fuel pricing at the pump, milk and juice packaging, and paint. US fuel economy is measured in miles per gallon (MPG). The US gallon is about 17% smaller than the UK imperial gallon (4.546 L), causing significant differences in fuel economy comparisons.
A gallon jug of milk is 3.785 L. Petrol (gasoline) is priced per US gallon at every US fuel station.
Imperial quart – Frequently Asked Questions
How many milliliters are in an imperial quart?
One imperial quart equals approximately 1,136.5 mL (about 1.137 liters). It is larger than both the US liquid quart (946.4 mL) and slightly larger than a liter.
How does an imperial quart compare to a US quart?
An imperial quart (1,136.5 mL) is about 20% larger than a US liquid quart (946.4 mL) — the same proportion as between the imperial and US gallons.
Is the imperial quart still used?
The imperial quart is rarely used in modern everyday life in the UK, Australia, or Canada following metrication. It may appear in older recipes, industrial standards, and some agricultural trade documents.
How many imperial fluid ounces are in an imperial quart?
One imperial quart contains 40 imperial fluid ounces (1 quart = 2 pints = 40 fl oz). A US quart = 32 US fluid ounces.
What countries use the imperial quart?
No major country officially uses the imperial quart for trade or labeling today. The UK, Canada, Australia, and New Zealand have all metricated. The unit may persist in informal speech or older documentation.
US liquid gallon – Frequently Asked Questions
Why does the US still price fuel per gallon when the rest of the world uses liters?
US fuel infrastructure — pumps, tax law, pipeline contracts, and consumer expectations — is built around the gallon. Federal and state fuel taxes are levied per gallon; EPA fuel economy standards use miles per gallon; and consumers benchmark prices against a gallon reference ("$3 a gallon"). Switching to liters would require reprogramming every pump, rewriting tax code, and re-educating 330 million people who compare prices by the gallon. Canada made the switch in the 1970s during a broader metrication push, but the US never had the political will for a comprehensive changeover.
Why is the US gallon smaller than the UK gallon?
The US gallon (3.785 L) is based on the Queen Anne wine gallon of 1707 (231 cubic inches). The UK imperial gallon (4.546 L) was defined in 1824 as the volume of 10 pounds of water. The two systems diverged after US independence.
How does US MPG compare to L/100km?
To convert: L/100km = 235.2 ÷ MPG (US). A car achieving 30 MPG uses about 7.8 L/100km. UK MPG values are always higher than US MPG for the same car because the imperial gallon is larger.
How many gallons of water does a person drink per day?
Recommended daily water intake is about 2–3 liters (roughly 0.5–0.8 US gallons). The commonly cited "8 glasses a day" ≈ 64 fl oz ≈ 0.5 gallons ≈ 1.9 liters.
How many gallons does a car fuel tank hold?
Most US passenger cars have fuel tanks of 10–20 gallons (38–76 liters). Compact cars are typically 10–13 gallons; mid-size cars 14–17 gallons; SUVs and trucks 18–36 gallons.