Gallon pints. These pints are divided into two cups (though the imperial cup is rarely used now), which in turn are divided into two gills (gills are also rarely used). Thus a gallon is equal to four quarts, eight pints, sixteen cups or thirty-two gills. The imperial gill is further divided into five fluid ounces, whereas the US gill is divided into four fluid ounces. Thus an imperial fluid ounce is of an imperial pint or of an imperial gallon, while a US fluid ounce is of a US pint or of a US gallon. The imperial gallon, quart, pint, cup
Pint pint can still be the principal unit used, otherwise metric units (usually the non-SI litre) must be used. There is no requirement for the litre quantity to be round numbers: thus the quantity of milk sold in a non-returnable container may be 1 pint, but will have "568 ml 1 pint", or just "568 ml" on the label. Many recipes published in the UK and Ireland still give ingredient quantities in imperial, where the pint is often used as a unit for larger liquid quantities. The Guild of Food Writers recommends that new recipes be published in metric units. The