A Big Mac costs about $3 at Mc Donald’s. The average McDonald’s Big Mac comes with meals as well. It is one of the most popular items at McDonald’s and serves as a meal for many. Although one may also choose meals where the Big Mac is accompanied by other items of choice, the Big Mac meal packages cost only about $4.5-$5. Since Big Mac is very popular, it continually remains as one of the key nutrition indices in the United States.