Online Volume & Capacity Converter
Convert between all common volume and liquid capacity units including Liters (L), Milliliters (mL), Gallons (US & UK), Fluid Ounces (fl oz), Cups, Pints, Quarts, Cubic Meters (m³), and Cubic Feet (ft³). This tool is highly useful for cooking, chemistry labs, fuel calculations, and international recipe adaptations.
Common Volume Conversion Factors
| Unit | Equivalent in Liters | Equivalent in US Gallons |
|---|---|---|
| 1 Liter (L) | 1 L | 0.2642 gal |
| 1 US Gallon (gal) | 3.7854 L | 1 gal |
| 1 UK Gallon (Imperial) | 4.5461 L | 1.2009 US gal |
| 1 US Fluid Ounce (fl oz) | 0.0296 L | 0.0078 gal |
| 1 US Cup | 0.2366 L | 0.0625 gal |
| 1 Milliliter (mL) | 0.001 L | 0.000264 gal |
US vs. UK Measurement Differences
The US and UK use different volume systems despite sharing unit names:
- 1 US Gallon = 3.785 liters (128 US fluid ounces)
- 1 UK Gallon = 4.546 liters (160 UK fluid ounces)
- 1 US Fluid Ounce = 29.57 mL
- 1 UK Fluid Ounce = 28.41 mL
Frequently Asked Questions
One US customary cup equals approximately 236.59 milliliters. For simple cooking, this is commonly rounded to 240 mL.
The US gallon was derived from older English wine measurements, while the UK adopted the Imperial gallon in 1824 based on 10 pounds of distilled water. This is why the UK gallon is approximately 20% larger than the US gallon.