This
calculator will help you to decide whether or not it would be
advantageous for you to consolidate a first and second mortgage and
refinance into a single mortgage with a lower interest rate. Not
only will this calculator calculate the monthly payment and net
interest savings, but it will also calculate how many months it will
take to break even on the closing costs.
Note: Be sure to
only include the principal and interest portion of your monthly
mortgage payment, i.e., do not include any escrow portions (property
taxes, insurance, etc.).