Convert between liters, milliliters, gallons, quarts, cups, fluid ounces, spoons and cubic units.
Liters
L
Gallons, liters and quarts side by side
Milliliters
mL
Cubic meters
m³
US gallons
US gal
US quarts
US quart
US pints
US pint
US cups
US cup
US fluid ounces
US fl oz
Tablespoons
tbsp
Teaspoons
tsp
Imperial (UK) gallons
UK gal
Cubic inches
in³
Cubic feet
ft³
Cubic yards
yd³
Show the working
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Formula
1 US gal = 231 in³ = 3.785411784 L (exact)1 gal = 4 qt = 8 pt = 16 cups = 128 fl oz1 cup = 16 tbsp = 48 tsp1 UK gal = 4.54609 L1 L = 1,000 mL = 1 dm³
How it works
The US liquid gallon is defined as exactly 231 cubic inches, and because the inch is exactly 2.54 cm, a US gallon is exactly 3.785411784 liters. Quarts, pints, cups, fluid ounces and spoons are fixed fractions of it.
The imperial gallon used in the UK is about 20% larger (4.54609 L), and imperial pints and fluid ounces differ too, so recipes and fuel figures from Britain need the right unit. This converter uses US measures except where “UK” is shown.
A liter is the volume of a 10 cm cube; a milliliter is the same as a cubic centimeter. A cubic meter holds 1,000 liters — useful for tanks, pools and shipping containers.
Frequently asked questions
How many cups are in a liter?
About 4.23 US cups. Recipes often round this to 4 cups, which is 946 mL (a US quart).
Are kitchen measuring cups US cups?
In the US, yes (236.6 mL), although nutrition labels use a rounded 240 mL. Australia, Canada and the UK commonly use a 250 mL metric cup.