A coffee cup is generally accepted as 149.94 milliliters, which is rounded up to 150 milliliters or 5.07 ounces. However, cups can range in size from 236 ml to 250 ml, it depends on where will you drink, and what occasions you are in.
Here is a list of ML measurements for all different sizes of coffee:
If you order a medium cup at a coffee shop or cafe, the average capacity is 12 fluid ounces. This is equal to 355 milliliters.
If you order a standard coffee cup at a coffee shop or cafe, the average capacity is 12 fluid ounces. This is going to be equal to 355 milliliters. Regular coffee is similar in size to a tall coffee.
If you are ordering a large coffee mug at a coffee shop or cafe, the average capacity is 16 fluid ounces. This is equal to 473 milliliters.
If you are ordering a king-size coffee mug at a coffee shop or cafe, the average capacity is 20 fl oz. This is equal to 591 milliliters.