Choosing Right internet speed

@EG  

If you are streaming a lot of content on firestick and also have a computer and tablet connected to your gateway what should be the ideal internet speed? I remember sometime ago either you or someone else posted a link here where it tells you what speed you need given the amount of devices connected to your network,  but I don't have that link anymore. In any case if I have amazon fire stick, computer and tablet what is a good internet plan how many mbps? 

Thanks