If you need to do more detailed calculations, consider TValue amortization software. TValue software offers you the flexibility to do any calculation.
TCalc Online Financial Calculators
TimeValue Software™ TCalc™ Financial Calculators are currently used by banks, credit unions, accounting firms, mortgage companies, real estate companies and many other industries that want to better serve and retain their website customers. Online calculators are also a great marketing tool. Bring your customers back to your site again and again, and expose them to all of your other services.