How Long Does It Take to Grill Chicken Breast?

If grilling multiple chicken breasts at a time, it helps to even cooking times by flattening the breasts to the same thickness. The chicken breast is done when it turns a solid white color and loses all of the pink tint. Another way to ensure that a breast is cooked through is to use a meat thermometer to check for an internal temperature of roughly 160 degrees Fahrenheit..