Volume Converter

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Litres, gallons, cups, millilitres, fluid ounces - the number of volume units in everyday use is staggering, and they vary by country in ways that catch people off guard. The Volume Converter handles the full range, converting between metric, imperial, and US customary volume units instantly.

Units You Can Convert

The tool supports millilitres (mL), litres (L), cubic centimetres (cm3), cubic metres (m3), US gallons, imperial gallons, US fluid ounces, imperial fluid ounces, US cups, tablespoons, teaspoons, pints, quarts, and cubic inches and feet. Enter a value in any of these and see all equivalent measurements update simultaneously.

The US Gallon vs. Imperial Gallon Problem

This trips up more people than you might expect. A US gallon is 3.785 litres. An imperial gallon (used in the UK) is 4.546 litres. That is a 20% difference. If a British recipe says "1 gallon of stock" and you use a US gallon, you are short by nearly a full litre. The volume converter distinguishes between these units clearly so you always know which gallon you are working with.

The same applies to pints and fluid ounces - US and imperial versions differ, and confusing them leads to consistent measuring errors.

Who Uses Volume Conversions

Cooks and bakers are the biggest everyday users. International recipes use different volume systems. An American recipe calls for cups, a European one uses millilitres, and an older British cookbook might reference imperial pints. Converting accurately means the difference between a perfect cake and a flat disaster.

Bartenders and beverage professionals work with fluid ounces, millilitres, and sometimes centilitres. Cocktail recipes from different countries use different units, and precision matters when balancing flavours in a drink.

Healthcare workers measure medication dosages in millilitres, but patients sometimes reference teaspoons or tablespoons. Knowing that 1 teaspoon is approximately 5 mL prevents dosing errors.

Engineers and scientists work with cubic metres, litres, and cubic centimetres depending on the scale of the problem. Fluid dynamics, chemical mixing ratios, and storage tank capacity calculations all require volume conversions.

Aquarium and pool owners need to calculate water volume for chemical treatments. A pool measured in feet and inches needs its volume in gallons or litres for proper chlorine dosing. An aquarium measured in centimetres needs litres for fish stocking guidelines.

Automotive enthusiasts encounter volume conversions when comparing fuel tank sizes, oil capacities, and engine displacements across vehicles from different markets. A 2.0L engine displacement is 122 cubic inches - useful to know when reading American car forums.

Cooking Conversions Quick Reference

1 US cup = 236.6 mL. 1 tablespoon = 14.8 mL (US) or 15 mL (metric). 1 teaspoon = 4.9 mL (US) or 5 mL (metric). 1 US fluid ounce = 29.6 mL. These small differences rarely matter for casual cooking, but they accumulate in large-batch recipes and professional kitchens where consistency is everything.

How It Works

Select your source unit, type a number, and every other unit updates instantly. No forms to submit, no pages to reload. The Volume Converter runs locally in your browser, processes everything client-side, and stores nothing. Fast, accurate, and ready whenever you need to translate between the world's many ways of measuring volume.