Only a three star, because yes, it does convert to metric. The problem I have is that I have to press the button to do so, I want it to be fully automatic every single time I enter a new website for a new recipe. I also want it to remove the imperial units, not have it be 500 cups (2000 grams) of butter.

Also, I did add 2000 grams of butter to my cake and now my oven is filled with butter and I can't get it out. This is not relevant to the review I just deeply screwed up.