How to Use
- 1 Enter your values
- 2 Click the Calculate button
- 3 Get your result instantly
- 4 Reset to calculate again
Volume Converter
What Is a Volume Converter?
A volume converter is a free online tool that instantly converts between metric and imperial units of volume or capacity. Whether you need to convert liters to gallons, milliliters to cups, or cubic meters to gallons, this volume converter handles it all — no download or signup required. Commonly used in cooking, chemistry, engineering, and everyday liquid measurements.
Common Volume Conversions
| From | To | Factor |
|---|---|---|
| 1 US gallon | liters | 3.78541 L |
| 1 UK gallon | liters | 4.54609 L |
| 1 US cup | milliliters | 236.588 mL |
| 1 liter | US gallons | 0.264172 gal |
| 1 fluid oz (US) | milliliters | 29.5735 mL |
| 1 cubic meter | liters | 1000 L |
ℹ️ The US gallon is legally defined as exactly 3.785411784 liters. The UK gallon (imperial) is defined as exactly 4.54609 liters. US and UK cup sizes also differ — US recipes typically use US cups (236.6 mL) not UK cups (250 mL).
Frequently Asked Questions
How many liters in a gallon?
1 US gallon = 3.78541 liters. 1 UK (imperial) gallon = 4.54609 liters. Make sure to check which gallon type your recipe or country uses.
How many milliliters in a cup?
1 US cup = 236.588 mL. Note that UK and Canadian cups are slightly different at 250 mL.
What is the difference between US and UK gallons?
The US gallon is smaller than the UK (imperial) gallon. 1 US gal = 3.785 L vs 1 UK gal = 4.546 L. Many recipes and scientific contexts specify which one to use.
How do I convert fluid ounces to milliliters?
1 US fluid ounce = 29.5735 mL. Multiply your fluid ounces by 29.5735 to get milliliters.
What units does this volume converter support?
This tool converts between 9 volume units: liter (L), milliliter (mL), cubic meter (m³), cubic centimeter (cm³), gallon (gal), quart (qt), pint (pt), cup, and fluid ounce (fl oz).
Is this volume converter free?
Yes. This volume converter is completely free to use with no signup or download required.