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Unit Converters

Volume Converter

Convert between litres, cups, gallons and more.

Volume units: a common source of recipe confusion

Volume conversion comes up constantly in cooking, where recipe sources mix units almost arbitrarily — a US recipe might call for cups and tablespoons, while a European one uses millilitres and litres. None of these is more "correct" than another; they're just different regional conventions.

This converter uses litres as the common base unit, with cup and tablespoon definitions based on the standard US customary measurements most commonly referenced online.

Frequently asked questions

Why is a US gallon different from a UK gallon?

The US and UK historically defined the gallon differently — a US gallon (3.785 litres) is smaller than a UK imperial gallon (4.546 litres). This calculator uses the US gallon, the more commonly referenced version in recipes and US-published content.

Why do recipes mix cups, tablespoons and millilitres?

Cooking measurement conventions vary by country and by recipe source — US recipes lean on cups and tablespoons, while most other countries default to millilitres and litres, which is exactly the kind of mismatch this converter is built to resolve quickly.

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