Mortgage Calculator provides a variety of free calculators to assist you in researching, planning and obtaining a 
mortgage as well as learning more about your existing mortgage. By using our free mortgage calculator you can calculate your monthly mortgage payments, interest rates, pay-off dates and amortization schedule, in addition to a number of other variables about mortgages such as finding the best rates.
Here is a list of the best mortgage calculatos available online
http://www.mortgagecalculator.org/
http://www.mlcalc.com/
https://www.rbcroyalbank.com/cgi-bin/mortgage/mpc/start.cgi
http://www.bankrate.com/calculators/mortgages/mortgage-calculator.aspx
http://www.bbc.co.uk/homes/property/mortgagecalculator.shtml
http://www.homefair.com/tools/mortgage-payment-calculator/index.asp?cc=1
http://www.mortgage-calc.com/
http://realestate.yahoo.com/calculators/payment.html
http://www.fool.co.uk/mortgages/mortgage-calculator/borrow-calculator.aspx
http://www.moneymadeclear.org.uk/tools.aspx?Tool=mortgage_calculator
http://www.mortgagecalculator.net/
http://www.mortgageloan.com/calculator/
image courtesy: http://www.kcrmortgages.com