How many milliliters in a fifth of whiskey?

One fifth of whiskey (or similar liquers) = 757.08236 milliliters. A typical liquer bottle found in Europe would hold 750 milliliters. In the US, we may still ask for a "fifth" or 'pint" or "half-pint" of liquor, but if you look at the bottom of the bottle, it will be marked "750", "375" or "200" ml.