US Gallons to US Cups
Convert us gallons to us cups instantly. 1 gal = 16 cup. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert us gallons to us cups
To convert us gallons to us cups, multiply by 16. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
cup = gal × 16
US Gallons to US Cups conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| US Gallons | US Cups |
|---|---|
| 1 gal | 16 cup |
| 2 gal | 32 cup |
| 3 gal | 48 cup |
| 5 gal | 80 cup |
| 10 gal | 160 cup |
| 20 gal | 320 cup |
| 25 gal | 400 cup |
| 50 gal | 800 cup |
| 100 gal | 1,600 cup |
| 500 gal | 8,000 cup |
| 1,000 gal | 16,000 cup |
What is a us gallon?
Exactly 231 cubic inches — smaller than the imperial gallon.
What is a us cup?
8 US fluid ounces. The standard American recipe measure.
The formula
cup = gal × 16
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the US Gallons to US Cups
- Type the number of us gallons you want to convert.
- Read the result in us cups straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked us cups to us gallons page.
US Gallons to US Cups — frequently asked questions
How many us cups are in a us gallon?
One us gallon equals 16 cup. cup = gal × 16
What is the formula to convert us gallons to us cups?
The formula is cup = gal × 16. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert us cups back to us gallons?
Divide instead of multiplying: one us cup is 0.0625 gal. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this us gallons to us cups free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the us gallons to us cups.
- us gallons to us cups
- gal to cups
- gal to us cups
- gallons to cup
- gallons to cups
- gallons to us cups
- us gallons to cup
- us gallons to cups
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error