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Converters · Volume

21 US gallons to US cups

21 gal =

336 cup

21 us gallons equals 336 us cups

gal

How to convert us gallons to us cups

To get us cups, multiply by 16.

cup = gal × 16

Worked example: 21 × 16 = 336 cup.

Going the other way, multiply by 0.0625 — one us cup is 0.0625 us gallons.

Values near 21 gal

US gallonUS cup
10.5 gal168 cup
19 gal304 cup
20 gal320 cup
22 gal352 cup
23 gal368 cup
42 gal672 cup

US gallon to US cup — common values

US gallonUS cup
1 gal16 cup
2 gal32 cup
3 gal48 cup
5 gal80 cup
10 gal160 cup
25 gal400 cup
50 gal800 cup
100 gal1600 cup

Convert US gallon to other units

gal → Lgal → mLgal → m³gal → qtgal → ptgal → cupgal → fl ozgal → tbspgal → tsp

← Reverse: US cup to US gallon

Questions

How do you convert us gallons to us cups?
To convert us gallons to us cups, multiply by 16. For example, 21 gal is 336 cup.
How many us cups are in a us gallon?
There are 16 us cups in one us gallon.
How do you convert us cups back to us gallons?
Go the other way: multiply by 0.0625. One us cup is 0.0625 us gallons.

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