Convert between metric volumes (milliliters, liters, cubic meters) and US customary measures (teaspoons, tablespoons, fluid ounces, cups, pints, quarts and gallons), plus the larger imperial UK gallon.
It is ideal for following American recipes in metric kitchens, comparing fuel prices abroad, measuring medicine doses, sizing aquariums and pools, or homework. All factors come from the exact definition of the US gallon (3.785411784 L).
How to use the Volume Converter tool
- Type the number you want to convert in the Value box, for example 2 with liters selected.
- Pick the unit you have in From and the unit you need in To.
- Read the result instantly in large type, with the exact formula used shown underneath.
- Open All volume units to see the same value in every unit at once, or press ⇄ to swap the direction.
- Use Copy result to paste the converted number into a document, spreadsheet or message.
Why use ToolOrca Volume Converter
- Eleven metric, US and UK units
- US and UK gallons kept separate
- Kitchen units: tsp, tbsp, cup
- Exact US fluid ounce: 29.5735 ml
- Live all-units table
- Free, no sign-up, works offline
How volume conversion works
The converter turns every volume into liters first. A US gallon is exactly 3.785411784 L and is split into 4 quarts, 8 pints, 16 cups or 128 fluid ounces. One US fluid ounce is 2 tablespoons or 6 teaspoons. The UK (imperial) gallon is larger, exactly 4.54609 L.
Worked example: 2 L ÷ 3.785411784 = 0.528344 US gallons. 1 US cup = 236.588 ml.
US versus UK measures
UK pints, fluid ounces and gallons differ from US ones: a UK gallon is about 20% bigger (1.20095 US gallons). This converter uses US measures for cups, pints, quarts and fluid ounces, the units used in American recipes and on most drink labels, and lists the UK gallon separately.
Frequently asked questions
How many ml are in a cup?
One US cup is 236.588 ml. Many recipes round it to 240 ml; a metric cup used in Australia is 250 ml.
How many liters are in a gallon?
One US gallon is exactly 3.785411784 liters. One UK gallon is exactly 4.54609 liters.
How many tablespoons are in a cup?
There are 16 tablespoons in one US cup, and 3 teaspoons in each tablespoon.
How many liters is a cubic meter?
A cubic meter holds exactly 1,000 liters.