Enter a value, select the source and target units, and convert. Results also update while you type. Swap units keeps the entered value. Common examples fill the calculator for you. Copy copies the numeric result only.
Good to know
US liquid and imperial units differ: 1 US gal = 3.785411784 L, while 1 imperial gal = 4.54609 L. The US customary cup is 236.5882365 mL; a metric cup is 250 mL. Dry measures and the 240 mL US labeling cup are not included. Volume cannot be converted to ingredient weight without density.