Volume Converter
Convert instantly between different units.
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Volume Unit Conversion Guide
Volume conversions are essential for cooking, chemistry, international travel, and fuel calculations. The metric system uses liters and milliliters, while the U.S. uses fluid ounces, cups, pints, quarts, and gallons. Note that US and UK/Imperial gallons are different sizes.
Key Conversion Factors
- 1 US gallon = 3.78541 liters = 128 fl oz = 4 quarts = 8 pints
- 1 UK imperial gallon = 4.54609 liters (20% larger than US gallon)
- 1 liter = 33.814 US fl oz = 4.227 US cups
- 1 US cup = 236.588 ml = 8 fl oz
- 1 tablespoon = 14.787 ml = 3 teaspoons
Cooking Volume Quick Reference
- 1 cup = 16 tablespoons = 48 teaspoons = 240 ml
- 1 pint = 2 cups = 473 ml
- 1 quart = 4 cups = 946 ml
- 1 gallon = 16 cups = 3.785 liters
Why is a US gallon different from a UK gallon?
The US gallon (3.785 L) is based on the Queen Anne wine gallon from 1707, while the UK/Imperial gallon (4.546 L) was standardized later as 10 pounds of water. When the U.S. gained independence, it retained the older wine gallon standard. This 20% difference matters when filling up a car abroad or following UK recipes.
How many ml is a standard drink?
A "standard drink" varies by country: 355 ml in the US (12 fl oz beer), 341 ml in Canada, 250 ml in Australia (mid-strength). For spirits: a US shot is 44 ml (1.5 fl oz), while a UK measure is 25 ml or 35 ml depending on the establishment. Always check local definitions when following health guidelines for alcohol consumption.