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Gallons to cups
Gallons to cups: type a value and read the result as you type, free and without signing up. The page also shows the value in every other volume unit. Nothing is uploaded: the maths runs in your browser.
How to convert volume units online
- 1Type the number you want to convert
- 2Check the units in From and To, or press Swap
- 3Read the result under the fields
- The converted value, plus every other unit.
What happens to your numbers
- Nothing is uploaded.The sum is done by your browser. The number you type never leaves your device.
- US customary units.Cups, fluid ounces and gallons follow the US system, set by the gallon of 3.785411784 liters.
- Works offline.Once the tool has been opened, it needs no connection.
What you can do
- Convert any value, including decimals and negative numbers. The result changes as you type.
- A worked example: 10 gallons = 160 cups.
- Press Swap to turn the conversion around without retyping the number.
- See the same value in every other volume unit in one table: milliliters, liters, cups, fluid ounces and gallons.
- Convert recipes between cups, fluid ounces and milliliters, or tank sizes and fuel between gallons and liters.
Good to know
- A US gallon is exactly 3.785411784 liters, or 128 US fluid ounces. The UK gallon is larger, about 4.546 liters, so check which one a figure uses.
- A US cup is 236.5882365 milliliters, or 8 US fluid ounces. Cups are the standard measure in American recipes.
- Results show up to 10 significant digits. Very large or very small values appear in exponent form, such as 1.500000e-7.
- A cup here is the US cup of 236.59 milliliters. The metric cup of 250 milliliters, used in Australia and in many recipes, is slightly larger.
Questions
Is this volume converter free?
Yes. It is free and needs no account or sign-up. Nothing you type is uploaded.
How exact is the result?
The factors are exact for US units: 1 gallon is 3.785411784 liters, 1 cup is 236.5882365 milliliters and 1 fluid ounce is 29.5735295625 milliliters. The result shows up to 10 significant digits.
Are these US or UK (imperial) units?
US customary units. A UK gallon is about 4.546 liters and a UK fluid ounce about 28.41 milliliters, so UK figures differ. This tool has no imperial units.
Can I convert to a different unit?
Yes. Change the To unit, or read the table below the result, which lists the value in every other unit.