Quarts
There is more than one kind of quart:
One US liquid quart is 946ml: US liquid quart
One UK quart is 1.14L: UK quart
UK fluid ounces
A UK fluid ounce is about 28.41 milliliters, a little smaller than the US fluid ounce of about 29.57 milliliters. So 1 US fluid ounce is about 1.04 UK fluid ounces.