If the average steer weighs 1150 pounds, the cutters will get 600 pounds hanging weight, which yields 25% waist and fat, 25% ground beef and stew meat, 25% steaks and 25% roasts. See How much meat is on the average cow ...? If you were to grind all the available meat, you'd have 450 pounds of ground meat. That would produce:
1800 quarter-pound burgers, or
1200 6-ounce burgers, or
900 half-pound burgers.
You may want to add some salt and pepper, but don't correct the numbers for that. If you add chopped raw onion, you'll be able to make slightly larger and heavier burgers while holding the numbers steady.
