About this volume converter
Convert liters, milliliters, US and UK gallons, cups and fluid ounces. Values convert through liters using standard unit definitions: one US gallon is exactly 3.785411784 liters, one UK gallon is exactly 4.54609 liters, and one US cup is exactly 0.2365882365 liters. Use this workspace to prepare a result you can review before putting it to use. All processing takes place on your device, without an account or an upload of your inputs. Check the examples to understand the expected output, read the limitations for the supported scope, and reset the form when you want to start a separate task.
How the volume converter works
Values convert through liters using standard unit definitions: one US gallon is exactly 3.785411784 liters, one UK gallon is exactly 4.54609 liters, and one US cup is exactly 0.2365882365 liters.
Volume Converter examples
1 US gal → L
3.785411784 L
1 L → US fl oz
≈33.814 US fl oz
Limitations & privacy
Nonnegative values up to 1 trillion. US and UK (imperial) units are different definitions and are not interchangeable by name alone. Display uses up to 15 significant digits; floating-point rounding still applies.
Inputs and results stay in this browser. Only tool identifiers are stored for your recently used tools. You can clear that history from the directory.
Volume Converter: frequently asked questions
How does the volume converter work?
Values convert through liters using standard unit definitions: one US gallon is exactly 3.785411784 liters, one UK gallon is exactly 4.54609 liters, and one US cup is exactly 0.2365882365 liters.
What can I inspect in the volume converter result?
The conversion input audit helps you check the result before using it. Nonnegative values up to 1 trillion. US and UK (imperial) units are different definitions and are not interchangeable by name alone. Display uses up to 15 significant digits; floating-point rounding still applies.
Does the volume converter upload my input?
Processing happens in your browser. No tool input or output is uploaded to a server. Use Reset to clear the current workspace before starting a separate task.
Updated September 26, 2026