Here are some common liquid measurements that add up to one gallon:

US Customary:

* 1 gallon = 4 quarts

* 1 gallon = 8 pints

* 1 gallon = 16 cups

* 1 gallon = 128 fluid ounces

Metric:

* 1 gallon ≈ 3.785 liters

You can also combine different measurements to make a gallon:

* 2 quarts + 2 pints = 1 gallon

* 8 cups + 4 pints = 1 gallon

* 64 fluid ounces + 64 fluid ounces = 1 gallon

Let me know if you need any more help with converting liquid measurements!