Unit Converter

Free Volume Converter

Convert between 17 volume units — metric, US customary and Imperial. Millilitres, litres, cubic metres, US gallons, Imperial gallons, cups, pints, fluid ounces and more.

Live conversion 100% offline One-click swap 17 units

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1 L

1 litre = 1 litre

All units for 1 litre

Unit	Value

Tip: US and Imperial volume units are not the same. One US gallon is 3.785 L; one Imperial gallon is 4.546 L — about 20% larger. Always check which system a recipe or spec uses.

About Volume Conversion

Volume measures three-dimensional space — how much liquid a container holds, how much a recipe needs, or how much cargo a ship carries. Unlike length and weight, volume has three different families of units that are still in active daily use: the metric system (litres and millilitres), the US customary system (gallons, cups, tablespoons), and the British Imperial system (Imperial gallons, pints and fluid ounces).

The tricky part: US and Imperial units share many names but not sizes. A US pint is 473 mL; an Imperial pint is 568 mL. A US gallon is 3.785 L; an Imperial gallon is 4.546 L — about 20% larger. When converting a UK recipe to US measures (or the reverse), you must use the correct system or you will end up with an off-by-20% result.

The 17 units supported

Unit	Symbol	Litres
Millilitre	mL	0.001
Centilitre	cL	0.01
Decilitre	dL	0.1
Litre	L	1
Cubic centimetre	cm³	0.001
Cubic metre	m³	1000
Cubic inch	in³	0.016387064
Cubic foot	ft³	28.316846592
US teaspoon	tsp	0.00492892159375
US tablespoon	tbsp	0.01478676478125
US fluid ounce	fl oz	0.0295735295625
US cup	cup	0.2365882365
US pint	pt	0.473176473
US gallon	gal	3.785411784
Imperial fluid ounce	fl oz imp	0.0284130625
Imperial pint	pt imp	0.56826125
Imperial gallon	gal imp	4.54609

US vs Imperial — the size difference

Unit name	US	Imperial	Difference
Fluid ounce	29.57 mL	28.41 mL	US ≈ 4% larger
Pint	473.2 mL	568.3 mL	Imperial ≈ 20% larger
Gallon	3.785 L	4.546 L	Imperial ≈ 20% larger

Common conversions

From	To	Factor
1 litre	US gallons	0.264172… approximately
1 US gallon	Litres	3.785411784 exactly
1 Imperial gallon	Litres	4.54609 exactly
1 US cup	Millilitres	236.5882365 exactly
1 US tablespoon	Millilitres	14.78676478125 exactly
1 cubic metre	Litres	1000 exactly

Common use cases

Cooking & Baking

Convert cups and tablespoons between US and metric recipes.

Fuel & Automotive

Convert litres to US or Imperial gallons for fuel economy.

Shipping & Freight

Convert cubic metres to cubic feet for container capacity.

Science & Lab

Convert between mL, cm³ and litres in lab work.

Beverage & Brewing

Convert keg sizes, bottle volumes and recipe amounts.

Medicine

Convert mL and fluid ounces for liquid medications.

Privacy and accuracy

This volume converter runs entirely in your browser. All conversions use exact definitional factors, so the results are as precise as the input. Nothing is uploaded, stored or logged — safe for confidential volumes, medical dosages and shipping calculations.

Frequently Asked Questions

How many litres in a US gallon?

There are exactly 3.785411784 litres in one US gallon. This is the exact definitional value — the US gallon is defined as exactly 231 cubic inches, and one inch is exactly 2.54 cm, so 231 × 2.54³ = 3,785.411784 cm³ = 3.785411784 litres.

How many litres in an Imperial gallon?

There are exactly 4.54609 litres in one Imperial gallon. The Imperial gallon was originally defined as the volume of 10 pounds of distilled water at a specific temperature, then redefined in 1985 to be exactly 4.54609 litres. It is about 20% larger than the US gallon.

How many millilitres in a cup?

A US customary cup is 236.5882365 mL. A US "legal" cup used on nutrition labels is exactly 240 mL. A metric cup (used in Australia, Canada and New Zealand) is exactly 250 mL. When following a recipe, check which cup the source uses.

How many tablespoons in a cup?

There are 16 US tablespoons in one US cup, or 8 US fluid ounces. This is a definitional relationship — the US cup is exactly 8 US fluid ounces, and 1 US fluid ounce is exactly 2 US tablespoons.

What is the difference between a US and an Imperial pint?

A US liquid pint is 473.176473 mL (one-eighth of a US gallon). An Imperial pint is 568.26125 mL (one-eighth of an Imperial gallon). The Imperial pint is about 20% larger. The British "pint of beer" is an Imperial pint; the American "pint of beer" is a US pint.

How do I convert a US recipe to metric?

Use the US units in this tool: 1 US cup → 236.59 mL, 1 US tablespoon → 14.79 mL, 1 US teaspoon → 4.93 mL, 1 US fluid ounce → 29.57 mL. If the recipe is British or Australian, use the Imperial units instead — 1 Imperial pint → 568.26 mL, 1 Imperial fluid ounce → 28.41 mL.

Is this volume converter free?

Yes. It is 100% free, requires no sign-up, and runs entirely in your browser.

Is my input sent to a server?

No. All conversions happen locally in JavaScript. Nothing is uploaded, stored or logged.

How accurate is the conversion?

Every conversion factor used here is the exact definitional value. The only source of rounding is the precision setting — increase decimal places for more digits.

What is a cubic metre?

A cubic metre is the volume of a cube measuring 1 metre on each side. It equals exactly 1000 litres, or 35.3146667 cubic feet. It is the SI unit of volume and is commonly used for shipping container capacity, concrete measurements and water volume.