Convert

I don't spend much time on the forums, so if this was already suggested i'm sorry. I would like though if riot had a way to convert riot points into IP. allot of the time i have about 100 left over and nothing to spend it on. I could buy more rp to try and lower that excess rp or possibly hit that zero mark. But what if i only main one champ and i more than likely wont purchase another item. Thanks for reading.