The Hamburger Calculator calculates the number of burgers you need to cook in order to feed a certain amount of people. Enter the number of people you need to serve and the serving size per person and you will get the amount of burgers you need to cook to meet that demand.
Photo by Niklas Rhöse
There are several facts that you can assume when figuring out how many burgers to cook.
Burgers are easy, everyone makes them. You can really have fun with toppings as well as seasonings and sauces mixed in with the meat before cooking. Go crazy and experiment with lots of flavors, just don't overcook the burgers. Most people want a burger to be cooked more than a steak, this helps kill any bacteria that can be inside the burger since it is ground and not just on the surface like with a steak. So cook them how your guests want to eat them but if they want well done, make sure you don't dry it out. When the juices coming out of the burger run clear it is just about done but not yet dried out.
For a good resource on everything from lighting your grill to cleaning it up when you're done and all the grilling tips you need in between, check out How To Grill Outdoors from campingcooks.com
https://www.artofmanliness.com/articles/grilling-basics-building-a-better-burger/