How many cups in a gallon?
1 US fluid gallon = 16 US cups. 1 US dry gallon = 18.6 US cups. 1 Imperial gallon = 16 Imperial cups.
Here is how:
For US:
In United States, 1 gallon has a capacity of 128 US fluid ounces and 1 US cup has a capacity of 8 US fluid ounces. That makes 128 / 8 = 16 cups in a gallon in US.
For Imperial System:
In Imperial system 1 gallon has a capacity of 160 imperial fluid ounces and 1 imperial cup has a capacity of 10 imperial fluid ounces. That makes 160 / 10 = 16 imperial cups in an imperial gallon in UK.
For Imperial Gallon to Metric Cup (UK):
Please note that UK now uses metric cups instead of the traditional imperial cups.
In Imperial system 1 gallon has a capacity of 4546.09 mL (160 imperial fluid ounces) and 1 metric cup has a capacity of 250 mL. That makes 4546.09 / 250 = 18.18436 metric cups in an imperial gallon.
How to convert from gallons to cups?
To convert from gallons to cups, as a formula multiply the gallon value "x" by 16 for both US fluid and imperial gallons and multiply by 18.618355 for US dry gallon.
To find out how many US cups in "x" US fluid gallons, as a formula multiply the US fluid gallon value "x" by 16.
US Cup = US Fluid Gallon × 16
To find out how many US cups in "x" US dry gallons, as a formula multiply the US dry gallon value "x" by 18.618355.
US Cup = US Dry Gallon × 18.618355
To find out how many metric cups in "x" imperial (UK) gallons, as a formula multiply the imperial gallon value "x" by 18.18436.
Metric Cup = Imperial Gallon × 18.18436
To find out how many imperial cups in "x" imperial (UK) gallons, as a formula multiply the imperial gallon value "x" by 16.
Imperial Cup = Imperial Gallon × 16
To find out how many Canadian cups in "x" imperial (UK) gallons, as a formula multiply the imperial gallon value "x" by 20.
Canadian Cup = Imperial Gallon × 20
To find out how many Canadian cups in "x" US fluid gallons, as a formula multiply the US fluid gallon value "x" by 16.653484.
Canadian Cup = US Fluid Gallon × 16.653484
For example, to find out how many US cups there are in a US fluid gallon and a half, multiply 1.5 by 16, that makes 24 cups in 1.5 gallons.
You may also use this volume units conversion tool to convert between US, imperial gallons and cups.
What is a gallon?
Gallon is an imperial and US Customary measurement system volume unit. There is one type of gallon in the imperial system and 2 types (fluid and dry) in the US Customary measurement system. The abbreviation is "gal".
One US fluid gallon is defined as 231 cubic inches and one US dry gallon is 268.8 cubic inches. An imperial gallon is 277.4 cubic inches. One US fluid ounce equals to 29.5 mL and one imperial ounce equals to 28.4 mL.
What is a cup?
Cup is a volume unit used to measure the liquid and dry foods. There is no international standard for the cup sizes but mostly US and metric cups are used. 1 US cup is 8 US fluid ounces, 1 imperial cup is 10 imperial fluid ounces, 1 Canadian cup is 8 imperial fluid ounces and 1 metric cup is 250 mL. The abbreviation is "c".
The list for your reference:
1 US Fluid Gallon = 16 US Cups
1 US Dry Gallon = 18.618355 US Cups
1 Imperial Gallon = 16 Imperial Cups
1 Imperial Gallon = 18.18436 Metric Cups
US & Imperial Gallons to Cups:
1/8 gal = 2 cups
1/4 gal = 4 cups
1/2 gal = 8 cups
1 gal = 16 cups
3/2 gal = 24 cups
2 gal = 32 cups
5/2 gal = 40 cups
Imperial Gallons to Metric Cups:
1/8 imp. gal = 2.27 metric cups
1/4 imp. gal = 4.54 metric cups
1/2 imp. gal = 9.1 metric cups
1 imp. gal = 18.18 metric cups
3/2 imp. gal = 27.2 metric cups
2 imp. gal = 36.3 metric cups
5/2 imp. gal = 45.5 metric cups