US Cups to Imperial Quarts (cup to qt (UK))
1 US cup equals 0.2081685462 imperial quarts (rounded).
How to convert US cups to imperial quarts
To convert US cups to imperial quarts, multiply the number of US cups by 0.2081685462. The factor is rounded to 10 significant digits. To go the other way, multiply imperial quarts by 4.803799702 (rounded).
imperial quarts = US cups × 0.2081685462
Example: 10 US cups = 2.081685462 imperial quarts.
Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.
About these units
US Cup (cup)
One sixteenth of a US gallon, 236.588 mL (8 US fluid ounces). The standard US recipe cup.
Cups began as household drinking vessels, not scientific units, which is why they remain the messiest measures in the kitchen. The US customary cup was defined by slicing up the gallon: half a pint, or eight US fluid ounces, about 236.6 milliliters. Unlike the larger units, nobody ever fixed it to a physical vessel, so it exists only as a fraction of the gallon.
The customary cup is not the only American cup. For nutrition labels, US regulation defines a cup as exactly 240 milliliters, a rounder figure that sits slightly above the customary size. Packaged foods therefore list a serving in the legal cup while a measuring cup from the hardware store follows the customary definition. The gap is 3.4 milliliters, which hardly matters for soup but can matter in baking. Cup measures also hide the weight of dry ingredients, since a cup of sifted flour and a cup of packed flour differ substantially, which is why much of the world prefers grams.
1 US cup = 0.2365882365 liters (exactly).
Sources: Wikipedia: Cup (unit); NIST SP 811, Appendix B.8: conversion factors for volume; 21 CFR 101.9: nutrition labeling household measures
Imperial Quart (qt (UK))
One quarter of an imperial gallon, 1.1365 L (40 imperial fluid ounces).
Quart comes from the Latin quartus, through French quart, and simply means a quarter: one quarter of a gallon. Because gallons of different sizes were in use over the centuries, quarts varied with them. The imperial version descends from the gallon fixed by the Weights and Measures Act 1824, defined by the weight of ten pounds of distilled water, which gave about 4.54 liters.
The modern figure is exact. The imperial gallon is now 4.54609 liters, so the imperial quart is 1.1365225 liters, equal to two imperial pints, eight gills or 40 imperial fluid ounces. British law still lists the quart as a quarter of a gallon among supplementary units. It is about 1.2 US liquid quarts, so recipes and cans from Britain, Canada and the United States can differ by a fifth. Canada's federal law even calls the imperial quart a pinte in French.
1 imperial quart = 1.1365225 liters (exactly).
Sources: Wikipedia: Quart; Wikipedia: Imperial units; UK Weights and Measures Act 1985, Schedule 1
Related conversions
- Imperial quarts to US cups (reverse)
- US cups to liters
- US cups to milliliters
- US cups to US gallons
- US cups to US fluid ounces
- US cups to cubic meters
- US cups to cubic centimeters
- US cups to US quarts
- US cups to US pints
- US cups to US tablespoons
- US cups to US teaspoons
- US cups to metric cups
- US cups to metric tablespoons
- Liters to imperial quarts
- Milliliters to imperial quarts
- US gallons to imperial quarts
- US fluid ounces to imperial quarts
See all volume units.