How do you define "one drink"? One serving? Or some measured amount of alcohol?
England has a public health measure of "units of alcohol" - 10 ml of pure alcohol.
With metric it's easy to convert. Serving size in litres * Alcohol by volume.
Thus, a 330 ml bottle of beer at 5% is about 1.65 units.
A bottle of wine at 12% would be 9 units (for a 0.75 l bottle)
A litre of vodka at 40% would be 40 units.
10 drinks a day seems high, even if we use this small "unit" figure for alcohol. That's EDIT 2 litres of alcohol per week; more than a bottle of wine every day; more than a lot of beer every day.