🧴 Volume Converter
Enter a value, choose the unit you have and the unit you want. All other common units are listed too.
Converted value
How the Volume Converter works
Each value is converted to a base unit using exact, internationally defined factors, then to the unit you want.
1 US gallon = 3.785411784 L · 1 UK gallon = 4.54609 L · 1 US cup = 236.588 mL · 1 US fl oz = 29.5735 mL · 1 ft³ = 28.3168 L
Step-by-step calculation
- 1Enter the value.
- 2Choose the unit you have and the unit you want.
- 3The value is converted to a base unit with exact factors.
- 4It is converted to your target unit (all others are listed too).
Worked example
1 US gallon = 3.785 L, and 2 liters = 8.45 US cups.
Volume Converter examples
| Value | Converted value |
|---|---|
| 1 | 3.7854 L |
| 2 | 7.5708 L |
| 5 | 18.9271 L |
| 10 | 37.8541 L |
| 100 | 378.5412 L |
Other inputs kept at the calculator's default values. Results calculated by this calculator.
Why use a Volume Converter?
Convert liquids for cooking, fuel, aquariums and science.
Important factors that can affect your results
- US vs UK gallons and pints.
- Dry vs liquid measures.
- Rounding.
Frequently asked questions
Is a UK gallon bigger?
Yes, about 20% bigger: 4.546 L versus 3.785 L for a US gallon.
How many mL in a liter?
1,000 mL.
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Last reviewed November 2026 · How we build and check our tools · Report a problem