Today's average mortgage rate on a 30-year fixed mortgage is 6.8%, up from 6.73% last week.The APR on a 30-year fixed-rate mortgage is 6.83%, with borrowers paying about $135,365 in total interest over the loan's life.The 15-year fixed mortgage rate is currently 5.77%, with borrowers paying around $50,140 in total interest.Mortgage rates follow economic factors, including U.S. Treasury bond yields and decisions by the Federal Reserve.