Volume Converter
Enter a value and choose a starting unit to convert between common volume measurements.
Last updated: August 31, 2026
Frequently asked questions
How many liters is a gallon?
1 US gallon equals about 3.785 liters. To convert gallons to liters, multiply by 3.78541.
Is a US gallon the same as a UK gallon?
No - a US gallon (3.785 L) is smaller than a UK/imperial gallon (4.546 L). This converter uses US gallons; adjust accordingly if you need imperial units.
Why is a US pint different from an imperial pint?
The US and imperial (UK) systems define their base units differently - a US gallon is smaller than an imperial gallon, and since a pint is defined as a fraction of a gallon in each system, US pints (16 fl oz) end up smaller than imperial pints (20 fl oz).
How many milliliters are in a fluid ounce?
One US fluid ounce equals approximately 29.57 milliliters. This differs slightly from the UK/imperial fluid ounce (about 28.41 mL), so it's worth checking which standard a recipe or product label is using before converting.
A teaspoon is how many tablespoons?
1 US teaspoon is 1/3 of a tablespoon, so 1 tablespoon equals exactly 3 teaspoons. Select "Teaspoons" or "Tablespoons" above to convert either direction, alongside liters, gallons, cups, and milliliters.
How many fluid ounces are in a gallon?
Exactly 128 US fluid ounces per gallon - a gallon is defined as 128 fl oz, so 1 gallon ÷ 128 gives the fl oz-to-gallon conversion factor directly. Select "Gallons" or "Fluid ounces" above to convert either direction.
How many quarts are in a gallon?
Exactly 4 quarts per US gallon - a quart is literally defined as a quarter-gallon. Select "Gallons" or "Quarts" above to convert between them alongside the other supported units.
How many cups are in a tablespoon?
1 tablespoon is 1/16 of a cup, so there are 16 tablespoons in a cup. Select "Tablespoons" or "Cups" above to convert either direction.