Litres as the base
Linear volume units are converted through litres. One cubic metre is 1000 litres.
US and imperial units differ
US gallons and imperial gallons are different sizes. The selector labels them explicitly so the two systems are not silently mixed.
Kitchen measurements
Cup, tablespoon, teaspoon, and fluid-ounce definitions can vary by country and context; this page labels the US definitions it uses.
Frequently asked questions
Does conversion happen in my browser?
Yes. These value conversions run in the browser and do not require an account.
Should I verify a critical conversion?
Yes. For engineering, laboratory, medical, financial, legal, or safety-critical work, verify the unit definition and result against an authoritative standard for your context.