A complete volume converter that handles everyday and scientific volume units in one place: millilitres, litres and cubic metres on the metric side, plus teaspoons, tablespoons, fluid ounces, cups, pints, quarts and gallons in both US and UK (Imperial) measures. Type any amount, choose a From and To unit, and the headline result plus a full grid of every other unit update live as you type — there is no calculate button to press.
It is built for cooks following recipes written in a different system, students converting between metric and customary units, and anyone who needs to know how a US gallon compares with a UK gallon without guessing. Because US and UK volumes share the same names but different sizes, the converter keeps them clearly separated so you never accidentally treat a UK pint (568 ml) as a US pint (473 ml).
How it works
Every unit is defined relative to the litre, which acts as a common pivot. Your input is first converted into litres, then out again into the target unit. The factors come straight from the official definitions, so they are exact before display rounding: 1 inch is exactly 2.54 cm, a US gallon is exactly 231 cubic inches (3785.411784 ml), and a UK Imperial gallon is defined by statute as exactly 4.54609 litres. The US fluid ounce is one 128th of a US gallon, and the Imperial fluid ounce is one 160th of a UK gallon, which is why the two systems diverge even though the names look the same.
Results are shown with sensible precision — up to six significant figures with trailing zeros
trimmed — so you get a clean number like 236.588 rather than a long decimal tail. The Swap
button flips your From and To units and carries the result across so you can reverse a
conversion in one click. Everything runs in your browser; nothing is uploaded.
Worked example
Say a US recipe calls for 2 cups of stock and you only have metric measuring jugs. Pick
Cups (US) as the From unit, enter 2, and choose Millilitres as the To unit. One US
cup is 236.59 ml, so 2 cups comes out as 473.18 ml — conveniently the same as one US pint.
Switch the To unit to Litres and you read 0.47318 L. The grid below the result also
shows that those 2 cups equal about 1.665 UK cups, a reminder that a UK cup is larger.
Conversion reference
| Unit | In millilitres | In litres |
|---|---|---|
| 1 millilitre (ml) | 1 ml | 0.001 L |
| 1 litre (L) | 1000 ml | 1 L |
| 1 cubic metre (m³) | 1,000,000 ml | 1000 L |
| 1 teaspoon (US) | 4.92892 ml | 0.00492892 L |
| 1 teaspoon (UK/metric) | 5 ml | 0.005 L |
| 1 tablespoon (US) | 14.7868 ml | 0.0147868 L |
| 1 tablespoon (UK/metric) | 15 ml | 0.015 L |
| 1 fluid ounce (US) | 29.5735 ml | 0.0295735 L |
| 1 fluid ounce (UK) | 28.4131 ml | 0.0284131 L |
| 1 cup (US) | 236.588 ml | 0.236588 L |
| 1 cup (UK) | 284.131 ml | 0.284131 L |
| 1 pint (US) | 473.176 ml | 0.473176 L |
| 1 pint (UK) | 568.261 ml | 0.568261 L |
| 1 quart (US) | 946.353 ml | 0.946353 L |
| 1 gallon (US) | 3785.41 ml | 3.78541 L |
| 1 gallon (UK) | 4546.09 ml | 4.54609 L |
Every figure is calculated locally in your browser — no numbers are uploaded or stored.