How many US quarts are in 1 imperial gallon?

1 imperial gallon equals 4.8038 qt.

How do I convert US quarts back to imperial gallons?

Use the reverse converter: 1 US quart equals 0.208169 imp gal.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert imperial gallons to US quarts, multiply the value by 4.8037997.

qt = imp gal × 4.8037997

150 imp gal × 4.8037997 = 720.57 qt

Imperial Gallon (imp gal): The UK imperial gallon, defined in 1824 and now exactly 4.54609 litres. Still seen in UK fuel economy figures.
US Quart (qt): A US liquid unit equal to a quarter of a gallon (0.946352946 L).

How do I convert imperial gallons to US quarts?: To convert imperial gallons to US quarts, multiply the value by 4.8037997.
How many US quarts are in 1 imperial gallon?: 1 imperial gallon equals 4.8038 qt.
How many US quarts are in 10 imperial gallons?: 10 imp gal equals 48.038 qt.
How do I convert US quarts back to imperial gallons?: Use the reverse converter: 1 US quart equals 0.208169 imp gal.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.