Volume Conversion Calculator
Convert volume between gallons, liters, cubic feet, fluid ounces, milliliters, cups, and more.
Calcady™ · Calculation Report Volume Calculator calcady.com 3D Volume CalculatorCalculated result for Total Volume: Total Volume125 Cubic Units Formula UsedVolume = edge³ |
Quick Answer: Common Volume Conversions
1 US gallon = 3.785 liters. 1 liter = 0.2642 US gallons. 1 cubic foot = 7.481 gallons. 1 US fl oz = 29.574 mL. Important: US gallons ≠ Imperial gallons — 1 Imperial gallon = 4.546 liters (20% larger).
Volume Conversion Reference
| From | To | Multiply By |
|---|---|---|
| US Gallons | Liters | 3.78541 |
| Liters | US Gallons | 0.26417 |
| Cubic Feet | US Gallons | 7.48052 |
| US Cups | mL | 236.588 |
| US fl oz | mL | 29.5735 |
| Imperial Gallons | Liters | 4.54609 |
Frequently Asked Questions
What is the difference between US and Imperial gallons?
A US gallon is 3.785 liters. An Imperial gallon (used in UK, Canada for some applications) is 4.546 liters — 20% larger. This means UK MPG figures appear higher than US MPG for the same car. A car rated 40 MPG (Imperial) is only 33.3 MPG (US). Always check which gallon standard is being used when comparing fuel economy or recipe measurements internationally.
Why are cooking measurements different between countries?
A US cup is 236.6 mL, an Imperial cup is 284.1 mL, an Australian cup is 250 mL, and a Japanese cup is 200 mL. A US tablespoon is 14.8 mL while an Australian tablespoon is 20 mL. These differences can ruin baking recipes where precision matters. When following international recipes, always check which measuring standard is used and convert accordingly.