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Volume Converter

Convert volume units instantly, free and with no sign-up.

What it is

The Volume Converter turns one volume measurement into another: millilitres, litres, cubic centimetres and cubic metres, plus US and imperial gallons, pints, fluid ounces, cups and tablespoons.

The recipe problem

Most people arrive here because of a recipe, and volume is where recipes go wrong more than any other measurement.

A cup is not one thing. The US cup is about 237 ml, the metric cup is 250 ml, and older British recipes sometimes mean 284 ml. The word is identical and the amount is not, which is why a cake from an American blog can come out wrong in a Brazilian kitchen without anyone doing anything incorrectly.

The same trap sits in gallons: a US gallon is about 3.79 litres, an imperial gallon about 4.55. A fuel consumption figure quoted in gallons is meaningless until you know which.

Tablespoons and fluid ounces vary by country too, though by less.

Where volume shows up outside the kitchen

  • Water tanks and pools, quoted in cubic metres. One cubic metre is exactly 1,000 litres, so a 5 m³ tank holds 5,000 litres.
  • Fuel tanks and engine capacity, where cubic centimetres and litres are used interchangeably: a 2,000 cc engine is a 2.0 litre engine.
  • Shipping, which prices by cubic metre.

How to use it

Pick the unit you have, pick the one you want, type the number. The result appears as you type, in both directions, so it does not matter which box you start from.

Everything runs in your browser: nothing is sent anywhere and there is no limit or sign-up.

Frequently asked questions

How many millilitres are in a litre?

Exactly 1,000. And 1 cubic metre holds 1,000 litres, so a 500 ml bottle is half a litre and a 1 m³ tank is 1,000 litres.

How many millilitres are in a cup?

A US cup is about 237 ml and a metric cup is 250 ml, which is why a recipe from a North American site and one from a Brazilian site are not measuring the same thing with the same word.

What is the difference between a US and an imperial gallon?

They are not the same: a US gallon is about 3.79 litres and an imperial gallon about 4.55. A fuel figure quoted in gallons means little until you know which one.

How do I convert a water tank from cubic metres to litres?

Multiply by 1,000. A 1 m³ tank holds 1,000 litres, and a 500 litre tank is half a cubic metre.

About this content

Written by:
Ferramenta Grátis
Updated on:
July 2, 2026

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