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Volume converter
Volume converter: convert between milliliters, liters, cups, fluid ounces and gallons online, free and without signing up. Pick the From and To units, type a value and read the result as you type. Nothing is uploaded: the maths runs in your browser.
How to convert volume units online
- 1Type the number you want to convert
- 2Pick the From and To units
- 3Read the result, or look it up in the table
- The value in your unit, plus every other unit.
What happens to your numbers
- Nothing is uploaded.The sum is done by your browser. The number you type never leaves your device.
- US customary units.Cups, fluid ounces and gallons follow the US system, set by the gallon of 3.785411784 liters.
- Works offline.Once the tool has been opened, it needs no connection.
What you can do
- Convert between all 5 units, with decimals and negative numbers. The result changes as you type.
- Example: 1 gallon = 3.78541 liters.
- Press Swap to turn the conversion around without retyping the number.
- The table lists the value in every unit except the From unit, so one entry gives you 4 results.
- Convert recipes between cups, fluid ounces and milliliters, or tank sizes and fuel between gallons and liters.
Good to know
- The page opens with milliliters as the From unit, liters as the To unit and a value of 1. Change either unit at any time.
- Results show up to 10 significant digits. Very large or very small values appear in exponent form, such as 1.500000e-7.
- A cup here is the US cup of 236.59 milliliters. The metric cup of 250 milliliters, used in Australia and in many recipes, is slightly larger.
Questions
Is this volume converter free?
Yes. It is free and needs no account or sign-up. Nothing you type is uploaded.
How exact is the result?
The factors are exact for US units: 1 gallon is 3.785411784 liters, 1 cup is 236.5882365 milliliters and 1 fluid ounce is 29.5735295625 milliliters. The result shows up to 10 significant digits.
Are these US or UK (imperial) units?
US customary units. A UK gallon is about 4.546 liters and a UK fluid ounce about 28.41 milliliters, so UK figures differ. This tool has no imperial units.
Which units can I convert?
Milliliters, liters, cups, fluid ounces and gallons. Pick any two of them.