Volume Unit Converter
Convert volume between liters, milliliters, US gallons, US cups, and US fluid ounces.
- Converted value
- 0.264172
How it works
Every unit converts to liters first using exact definitions built from the legally defined US fluid ounce (1 US fl oz = 29.5735295625 mL exactly): 1 US cup = 8 fl oz, and 1 US gallon = 128 fl oz = 3.785411784 L. Milliliters are simply 1⁄1000 of a liter.
Converting through a common base unit keeps every conversion pair exact. Note these are US customary units — Imperial (UK) gallons, cups, and fluid ounces use different definitions and would need different factors.
FAQ
Are these US or Imperial (UK) units?
US customary units — a US gallon (3.785411784 L) is noticeably smaller than an Imperial gallon (4.54609 L). If you need UK/Imperial volume units, this calculator's factors won't apply directly, since the two systems define their base units differently despite sharing unit names like 'gallon' and 'cup'.