How to use this tool
Check the units, enter your values, and run the tool. Results follow the assumptions and method below.
Calculation method
A monthly payment
ratea == 0 ? principal/monthsa : principal*(ratea/1200)/(1-(1+ratea/1200)^(-monthsa))B monthly payment
rateb == 0 ? principal/monthsb : principal*(rateb/1200)/(1-(1+rateb/1200)^(-monthsb))A lifetime interest and fees
((ratea == 0) ? principal/monthsa : principal*(ratea/1200)/(1-(1+ratea/1200)^(-monthsa)))*monthsa+feea-principalB lifetime interest and fees
((rateb == 0) ? principal/monthsb : principal*(rateb/1200)/(1-(1+rateb/1200)^(-monthsb)))*monthsb+feeb-principal