This will depend on a few factors like the thickness of the patty or how large they are and how high your heat is set. A meat thermometer will give you the best gauge. Here is a good rule of thumb: Medium-rare burgers (warm, red center): 6 minutes total - 130 to 135°F. Medium burgers (warm, pink-center): 7 to 8 minutes total - 140 to145°F. Medium-well (hot, slightly pink center): 9 minutes - 150-155°F. Well-done burgers (brown all the way through): 10 minutes total - 160 to 165°F. The USDA recommends cooking ground beef to an internal temperature of 160°F (well done).