Not really.  If you live in the north, spend all day indoors, and don't spend much time in your car (remember UVA comes through glass), then that might be enough.   Otherwise, I would recommend using more than that and, if you spend a lot of time outdoors, I'd probably triple that and use a powder sunscreen, like Colorscience Sunforgettable, over the cream.   Why scrimp on sunscreen when it's  your most important beauty product?  And, it helps to prevent skin cancer!     Dr. I