Question: are us and canadian ounces the same?
Answer: The result - in metric of course - is that the official Canadian measurement is just over 28 millilitres, compared to America's 30. That makes the Canadian one-ounce shot about 93 per cent of the size of the U.S. shot, meaning that only 38 U.S. shots can be poured from a Canadian 40-ounce bottle.