Volume Converter
Convert between milliliters, liters, cups, gallons, ounces, and more.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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This converter handles ten common volume units used in cooking, science, and everyday life. Results appear instantly as you type.
- Enter the volume. Type a number into the volume field. Decimals are supported for precise measurements.
- Select the source unit. Choose the unit you are converting from. Options include milliliters, liters, US fluid ounces, US cups, US pints, US quarts, US gallons, Imperial gallons, tablespoons, and teaspoons.
- Select the target unit. Choose the unit you want to convert to. Use the swap button to quickly reverse the direction.
- Read the result. The converted value appears on the result card along with the conversion ratio between the two units, so you can verify the math or use the ratio for quick mental calculations.
Use Copy to copy the result or Share to send a pre-filled link to someone else.
About Volume Conversion
Volume measurements vary by country and context. The US customary system uses cups, fluid ounces, pints, quarts, and gallons. The metric system uses milliliters and liters. Recipes from different countries often require converting between these systems, and the differences are not always intuitive. For example, a US cup is 236.6 mL, while an Imperial cup (used in older British and Australian recipes) is 284 mL.
This converter uses US customary measurements for cups, pints, quarts, and gallons, which is the most common system you will encounter in online recipes. Imperial gallons are included separately because they are still used for fuel and beverages in the UK and some Commonwealth countries. One Imperial gallon is about 20% larger than one US gallon.
All conversions go through milliliters as the base unit, which ensures accuracy and consistency. The conversion factors used here follow the National Institute of Standards and Technology (NIST) definitions.
Frequently Asked Questions
How many milliliters are in a US cup?
One US cup equals approximately 236.6 milliliters. This is the standard measurement used in American recipes. If you see a recipe from the UK or Australia that mentions "cups," it may use a slightly different cup size (250 mL for the metric cup), so check which system the recipe follows.
What is the difference between a US gallon and an Imperial gallon?
A US gallon is 3,785.41 mL (128 US fluid ounces), while an Imperial gallon is 4,546.09 mL (160 Imperial fluid ounces). The Imperial gallon is about 20% larger. This difference matters when comparing fuel economy figures or beverage quantities between the US and the UK.
How many tablespoons are in a cup?
There are 16 US tablespoons in one US cup. Each tablespoon is approximately 14.79 mL, and each cup is approximately 236.6 mL. This is a handy ratio to remember when scaling recipes up or down.
How do I convert fluid ounces to milliliters?
Multiply the number of US fluid ounces by 29.5735 to get milliliters. For a quick estimate, one fluid ounce is roughly 30 mL. For example, 8 fluid ounces (one cup) is about 237 mL.