Volume Converter
Convert volume between U.S. cups, teaspoons, tablespoons, fluid ounces, pints, quarts, gallons, milliliters, and liters.
What is Volume Converter?
The volume converter switches between U.S. cooking and liquid measurements and metric units — every unit you will see on a U.S. recipe or beverage label.
Note: this uses U.S. customary units, not imperial. 1 US gallon = 3.785 L, while 1 imperial (UK) gallon = 4.546 L. They are not the same.
Formula
All conversions go through milliliters using exact factors:
- 1 US tsp = 4.92892159375 mL, 1 US tbsp = 3 tsp
- 1 US fl oz = 2 tbsp, 1 US cup = 8 fl oz = 236.588 mL
- 1 US pint = 2 cups, 1 US quart = 2 pints, 1 US gallon = 4 quarts = 3.785 L
Worked example
Convert 1 US cup:
- = 8 fl oz
- = 16 tablespoons
- = 48 teaspoons
- = 236.59 mL
- = 0.25 quarts
How to use this calculator
- Enter a quantity.
- Pick the unit you have.
- Read off any other unit — all nine appear at once.
Frequently asked questions
Is a US cup the same as a metric cup?
No. A U.S. cup is 236.59 mL; a metric cup (used in Australia and some international recipes) is exactly 250 mL. A "legal" cup on U.S. nutrition labels is also 240 mL. For American recipes, use the default U.S. cup in this calculator.
What about dry measurements like flour?
These are volume units. A cup of flour weighs differently than a cup of sugar because density varies. If you need to convert by weight, you need ingredient-specific density data (typically 125 g/cup for all-purpose flour, 200 g/cup for granulated sugar, and so on).
Is a fluid ounce the same as an ounce?
No. A fluid ounce is a volume unit; an ounce is a weight unit. A fluid ounce of water weighs approximately one ounce, which is probably where the confusion comes from.
Why is 1 gallon exactly 231 cubic inches?
The U.S. gallon was defined in 1707 as the volume of a cylinder 7 inches in diameter and 6 inches high, giving 230.907 cubic inches — rounded to 231. It has stayed there ever since.