Convert volume, instantly.
Milliliters, liters, cups, fluid ounces, pints, quarts and gallons — built for recipes as much as for lab work.
Volume Converter
Volume conversion benchmarks
🧪 Volume
| 1 US cup | 240 ml |
| 1 US gallon | 3.78541 l |
| 1 liter | 33.814 fl oz |
| 1 tbsp | 14.7868 ml |
How this conversion works
All volume units here convert through liters as the base unit. The imperial and US customary units used (cups, tablespoons, fluid ounces, pints, quarts, gallons) follow the US customary definitions, which is the convention most recipes and packaging in North America use.
If you're converting a UK recipe, note that the UK imperial pint (568 ml) and gallon (4.546 l) are larger than their US counterparts — this converter uses US customary values, so a UK measurement converted here will read slightly differently than the UK-specific figure.
Frequently asked questions
Are these US or UK (imperial) measurements?
US customary. A US cup is 240 ml and a US gallon is 3.78541 l; the UK imperial versions of these units differ, so keep that in mind if you're working from a British recipe or fuel receipt.
How precise is a 'cup' as a unit?
A US cup is standardized at exactly 240 ml for conversion purposes, though real-world measuring cups can vary slightly by manufacturer. For baking where precision matters, weighing ingredients in grams is generally more reliable than volume.