1 US gal equals 16 US cup. The name of a customary unit matters: US liquid and Imperial units are not interchangeable. US liquid gallon (US gal) is shown explicitly so a reader can recognize the term used in recipes and measuring tools.
US liquid gallon and US cup belong to measurement conventions that may look familiar but are not always equivalent across countries. Mendeleev.com therefore keeps the system name next to the abbreviation and calculates from defined conversion factors rather than rounded kitchen rules.
1 US gal = 16 US cup · 10 US gal = 160 US cup.
16 US cup
The conversion keeps the physical quantity unchanged; only the unit used to express it changes. Apply the relation below, keep the unit with the number, and round only at the end.
1 US gal = 16 US cup · 10 US gal = 160 US cup.