7 trans actions per seconds. But there are several changes in the pipline to fix this. One solution is having "off-chain" transactions not on the main blockchain, this would allow us to not record every coffee purchase made in bitcoin to be stored on the main chain. Look up Lightning Network if you are interested in how this is being done. Your main point is correct that Bitcoin can only handle 7 tps while Visa can handle 20,000 tps.
