About the Volume Converter
Volume Converter changes a liquid or container volume between millilitres, litres, cubic metres, US teaspoons, tablespoons, fluid ounces, cups, pints, quarts and gallons, UK pints and gallons, cubic inches and cubic feet. Type a number, pick its unit and see every other unit at once. It keeps US and UK units apart, which is where most conversion mistakes come from. It suits cooking, fuel and fluids, aquariums, tanks, shipping and any project that mixes metric and imperial sizes.
Updated October 2026
How to use the Volume Converter
- 1Type the a volume or capacity you want to convert.
- 2Choose the unit it is in from the From unit list.
- 3Read the result in every other unit straight away.
- 4Press Copy to keep the answer, or change the number to try another.
When you need a a volume or capacity converter
Volume Converter changes a liquid or container volume between millilitres, litres, cubic metres, US teaspoons, tablespoons, fluid ounces, cups, pints, quarts and gallons, UK pints and gallons, cubic inches and cubic feet. Volume units look the same across countries but are not. A US pint is 473 ml, a UK pint is 568 ml, and a US gallon is about 17% smaller than a UK gallon. If a recipe or a fuel figure came from the UK, Canada or Australia, check whether it is imperial before you convert.
Units and what they mean
For cooking, 1 US cup is 236.6 ml (many recipes round it to 240 ml) and a tablespoon is 14.8 ml. Metric cups and spoons are slightly different again (250 ml and 15 ml), which rarely matters in a recipe but can matter for medicine, where you should use an oral syringe and the exact millilitres on the label.
- Millilitre, litre, cubic metre: 1,000 ml per litre and 1,000 litres per cubic metre
- US teaspoon, tablespoon, fluid ounce, cup, pint, quart, gallon: 3 tsp per tbsp, 2 tbsp per fl oz, 8 fl oz per cup, 16 cups per gallon
- UK (imperial) pint and gallon: a UK pint is 20 imperial fl oz and a gallon is 8 pints
- Cubic inch and cubic foot: used for engines, boxes and storage space
Tips for accurate results
For tanks and pools, work out the volume in cubic metres or cubic feet from length times width times depth, then convert to litres or gallons here. One cubic metre holds exactly 1,000 litres and one cubic foot about 28.3 litres.
Round only at the end of a calculation. If you convert and then convert again, keep the full number in between so small errors do not add up.
Related conversions
Fluid ounces measure volume, and ounces of weight are a different thing, so a cup of flour and a cup of water do not weigh the same. Related tools: Cooking Converter, Weight Converter, Tank Volume Calculator, Pool Volume Calculator and Unit Converter.
Features
- 14 units in one list
- Every result shown at once
- Exact factors, no rounding until you read it
- Works with decimals and negative-free values
- Copy button for the answer
- Calculated in your browser, so nothing is uploaded.
Frequently asked questions
How do I convert a volume or capacity?
Type the number, pick the unit you start with and read the answer in every other unit below. Each unit is stored as an exact factor of one base unit, so a result is the number times its factor divided by the target unit's factor.
How many litres are in a US gallon?
3.785411784 litres. The page uses this exact value.
Is a UK gallon the same as a US gallon?
No. A UK or imperial gallon is 4.54609 litres, about 20% more than a US gallon.
How many cups are in a litre?
About 4.227 US cups, since one US cup is 236.588 ml.
Is the result exact?
The factors used are the official or standard definitions, so the maths is exact. The page rounds what it shows to about 10 significant digits so numbers stay readable.
Does it work on my phone?
Yes. The page is built for small screens, with large inputs and a list of units you can scroll.
Is anything sent to a server?
No. The conversion is plain arithmetic in your browser, so nothing you type leaves your device.