Originally Posted by Alix
Not sure where our OP is from (Phillipines?) but the answer is no, butter is not always marked on the wrapper.
I travel frequently between Thailand and the Philippines where in both places, butter is normally sold in little blocks of 227g. In culinary school, we were taught to treat this as 1 cup of volume. I've never actually melted a block to confirm the 1 cup measurement but I've always used this 1-cup guideline to cut up the block into 1/2 C or 1/4 C or 1/8 C or 16 tablespoons. Has always turned out fine.
Depending on the brand, sometimes I would see measurement markings on the outside of the butter wrapper but I've never paid much attention to it because my method works perfectly for me (and the wrappers are not really aligned to the butter!)
I always thought 'stick of butter' is how butter is normally sold in the U.S. This would be a lengthwise half of our little 227g block which would make it one-half cup in volume measurement.