Volume Converter
Convert between liters, gallons, cups, milliliters and more — instantly and accurately.
📖 How to Use the Volume Converter
❓ Frequently Asked Questions
Volume Converter: Convert Liters, Gallons, Cups, and More
Volume conversion comes up constantly in the kitchen and beyond — following a recipe written in milliliters when your measuring cups are in ounces, checking a US gallon against a liter-based fuel price, or converting a lab measurement between milliliters and teaspoons. A volume converter handles these instantly, without needing to remember each factor.
How Volume Conversion Works
Volume conversion is a straightforward ratio — you multiply or divide by a fixed factor. This converter supports 11 units: liter, milliliter, cubic meter, cubic centimeter, US gallon, quart, pint, cup, fluid ounce, tablespoon, and teaspoon.
Enter a value, choose your "From" and "To" units, or use a quick-pair shortcut like L → gal, and the result updates instantly along with the exact conversion formula.
Common Volume Conversions
These are illustrative examples using standard conversion factors:
- 1 liter ≈ 0.264 US gallons
- 1 US gallon ≈ 3.785 liters
- 1 cup ≈ 236.6 milliliters
- 1 US fluid ounce ≈ 29.57 milliliters
- 1 tablespoon ≈ 14.79 milliliters
- 1 teaspoon ≈ 4.93 milliliters
US Gallon vs Imperial Gallon: An Important Distinction
This is one of the most common sources of error in volume conversion. The US gallon (used in this converter) equals about 3.785 liters, while the imperial gallon (used in the UK and some other countries) equals about 4.546 liters — roughly 20% larger. The same applies to fluid ounces: a US fluid ounce (≈29.57 mL) is different from a UK fluid ounce (≈28.41 mL).
If you're converting a UK recipe, a UK fuel price, or any imperial-labeled measurement, using this converter's US gallon and US fluid ounce values will give you an incorrect result. Always confirm which gallon or fluid ounce definition your source is using before converting.
Volume Conversion for Cooking
Cooking measurements are one of the most common reasons people search for volume conversions, especially when following recipes from a different country. Cups, tablespoons, and teaspoons in this converter follow US customary definitions. One important caveat: converting a dry ingredient's weight (like grams of flour) into a volume measurement (like cups) isn't a direct volume-to-volume conversion — it depends on the ingredient's density, which this tool doesn't account for. This converter is built for volume-to-volume conversions only, such as milliliters to cups or US fluid ounces to tablespoons.
Limitations to Keep in Mind
- All units in this converter follow US customary definitions (US gallon, US fluid ounce, US cup). If you need imperial (UK) equivalents, the values will differ and shouldn't be used interchangeably.
- This tool converts volume to volume only. It doesn't convert between mass (grams, ounces by weight) and volume (mL, cups), since that requires knowing the substance's density.
- Calculations happen directly in your browser using JavaScript, so there's no need to send your values to a server to get a result.
Related Conversions You Might Need
- Use the Unit Converter if you need volume, length, weight, and other categories in one place.
- Use the Weight Converter for kilograms, grams, and pounds — useful if you're converting mass rather than volume.
- Use the Area Converter for square feet, square meters, and acres.
- Use the Length Converter for meters, feet, and other distance units.
Frequently Asked Questions
How many liters are in a gallon?
One US gallon equals approximately 3.785 liters. Note that this is different from the imperial gallon (used in the UK), which equals about 4.546 liters.
Can I convert grams to cups using this tool?
Not directly. This converter handles volume-to-volume conversions only. Converting grams (a weight) to cups (a volume) depends on the ingredient's density, so 100 grams of flour and 100 grams of sugar don't fill the same number of cups.
How many milliliters are in a cup?
One US cup equals approximately 236.6 milliliters. Note that other countries sometimes define a "cup" slightly differently, so recipes from outside the US may use a different value.
Why does my UK recipe's gallon or fluid ounce not match this converter?
This converter uses US customary definitions. The UK (imperial) gallon and fluid ounce are both larger than their US counterparts by roughly 20% and 4% respectively, so applying US values to imperial-labeled measurements will give an incorrect result.
How many teaspoons are in a tablespoon?
There are 3 US teaspoons in 1 US tablespoon. Using the converter's factors, 1 tablespoon (≈14.79 mL) divided by 1 teaspoon (≈4.93 mL) confirms this ratio.
