Volume Converter for the Classroom
Convert teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons, milliliters and liters.
About this volume converter
This converter handles liquid volume in US customary units and metric units. The US gallon is defined as exactly 231 cubic inches, which is 3.785411784 liters, and the quart, pint, cup, fluid ounce, tablespoon and teaspoon are exact fractions of it.
Units here are US liquid units. Imperial (UK) cups, pints and gallons are different sizes and are not included.
For a printable reference, see the measurement conversion chart.
How to use it
- Type a value.
- Choose the unit you are converting from and the unit you want.
- Read the result.
- Press Swap to reverse it.
- Copy the link to share the exact conversion.
Classroom tips
- Fill a gallon jug with cups of water to show that 16 cups make a gallon.
- Use the Gallon Man style drawing on the board: gallon, quarts, pints, cups.
- Compare a liter bottle and a quart carton; a liter is a little more than a quart.
- Link to cooking and recipes to make the units meaningful.
Reviewed 2026-10-03. Conversion factors are exact definitions.
Frequently asked questions
Are these US or imperial units?
US liquid units. A UK pint, quart or gallon is larger, so do not use this page for imperial measures.
How many milliliters are in a cup?
A US cup is 236.5882365 milliliters, which many recipes round to 240 milliliters for the metric cup.
Are the factors exact?
Yes. They follow from the exact definition of the US gallon as 231 cubic inches.
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