About Volume Converter
Volume Converter switches a capacity between ten units: millilitres, litres, cubic metres, teaspoons, tablespoons, fluid ounces, cups, pints, quarts and US gallons. It covers both the metric measures used in most of the world and the customary measures used in American recipes and fuel pricing.
A point that trips people up is that the imperial-style units here are all US customary, not UK imperial. A US gallon is 3.785 litres, whereas the UK gallon is 4.546 litres — roughly twenty percent larger — and the same split runs through pints, quarts, fluid ounces and cups. So a recipe that assumes UK measures will not convert correctly with this tool, and the same applies to fuel economy figures quoted in British gallons.
The metric side is exact by construction: a litre is one cubic decimetre, so it equals 0.001 cubic metres exactly. The result is returned as a bare number, and the unit it belongs to is whichever you chose in the To selector; for cooking quantities you will usually want to round it to a sensible fraction or two decimals.
How to use Volume Converter
- 1 Enter the volume to convert.
- 2 Pick the source unit — litres, gallons, cups and so on.
- 3 Pick the destination unit and run the tool.
Frequently asked questions
Are the gallons US or UK?
US. The label reads Gallons (US) because that is the unit used, and every related unit — pints, quarts, cups, fluid ounces, teaspoons and tablespoons — is the US customary version too. A UK gallon is about 4.546 litres and would give a different answer.
Why does a US cup differ from a metric cup?
Because it comes from the US customary system. A US cup is about 236.6 millilitres, while a metric cup is 250 millilitres and a US legal cup used for nutrition labelling is 240 millilitres. For precise baking the distinction can shift a recipe.
Is a litre exactly a thousand millilitres?
Yes, that one is exact, and a litre is also exactly one cubic decimetre, or 0.001 cubic metres. The metric relationships are all decimal and have no rounding in them.
Which unit should I use for a recipe?
The one your recipe is written in. If it lists cups and tablespoons, stay with US cups and tablespoons, since converting to millilitres and back introduces rounding at each step and does not improve the dish.
Free, online, and private
Free to use
Volume Converter is completely free. There is no account to create, no login, and no hidden charge or usage limit.
Runs online in your browser
It is a free online tool that runs entirely in your browser. Nothing to download or install — open the page and start using it right away.
Your data stays private
All processing happens locally on your device. Your input is never uploaded, stored, or tracked, so it never leaves your browser.
How Volume Converter behaves in detail
These are the specifics of this implementation — the exact ranges, defaults and fixed settings you are working with.
| Parameter | Value |
|---|---|
| Units covered | 10 — mL, L, m³, tsp, tbsp, fl oz, cups, pints, quarts and US gallons |
| Conversion basis | litre |
| Anchors | 1 gal = 3.78541 L (labelled US) · 1 quart = 0.946353 L · 1 pint = 0.473176 L · 1 cup = 0.236588 L |
| Spoon sizes | tsp 0.00492892 L and tbsp 0.0147868 L — the US customary definitions, a ratio of exactly 1 to 3 |
| Result precision | 8 decimal places, from a starting Value of 1 |
| Default pair | l → gal |
Compiled from the implementation of this tool and checked against it by itoolnet.
What Volume Converter does not do
Knowing the edges of a tool saves more time than another list of its features. These are the cases where it will not do what you might expect.
- Every cooking unit on this page is US customary. The imperial gallon is 4.54609 L — about 20% larger — and imperial pints and fluid ounces are bigger in the same proportion, so a UK recipe run through here comes out short; UK Volume Converter is the separate page for those.
- The spoons are the US definitions too. An Australian tablespoon is 20 mL and a UK tablespoon 15 mL against the 14.7868 mL used here, so a recipe written outside the United States will not match, and there is no unit that says which tablespoon is meant.
- Dry measures are absent. Bushels, pecks, dry gallons, barrels, shots and hogsheads are all missing, so a US dry pint or a barrel of oil needs Dry Volume or a second pass — nothing on this page separates a wet pint from a dry one.
Tested and documented by itoolnet, the team that builds and maintains this site.