Kitchen and fuel volumes converted correctly — including the US/UK gallon difference that trips everyone up.
How it works
- Select your starting and ending volume units.
- Type the liquid measurement (e.g., 5 gallons).
- Get the precise converted volume for cooking or engineering.
Frequently asked questions
Why two gallons?
The US kept the old wine gallon; the UK redefined to the imperial gallon in 1824. They differ by ~20%.
Is a "cup" universal?
No — US legal cup is 240 mL, US customary 236.6 mL, metric cup 250 mL. This tool uses US customary.
mL to fl oz quick rule?
Divide mL by ~29.6 for US fluid ounces.