Using a reference drink that you specify (e.g. a 330ml can of 4% beer), Drinks Calculator can work out how many of that drink are in any other container of drinks, as well as the price!
The easy-to-use calculator screen lets you input all the info it needs to calculate how much is in that 15 box of pre-mixes, or that big bottle of whiskey. Quantity, volume, alcohol percentage, and price are all it needs!
You can use different units of measurement too, currently supported is millilitres, centilitres, litres, and US ounces