Free Loan Calculator - Version 4.7 This free loan payment calculator for Windows allows you to quickly calculate and compare loan payments based upon variable payment frequency! Offers Daily 365/year, Daily 360/year, Weekly, Biweekly 26/year, Bimonthly 24/year, Monthly, Quarterly, Biannual, and Annual payment periods. Free Loan Calculator is a financial calculator designed for 2000/XP/Vista systems. It offers integrated help, provides automatic hints, and offers Wheatworks' integrated Upgrade Center for easy, free, online updates. It allows you to compare two loans side-by-side and calculates Principal, Interest, Taxes and Insurance (PITI).