Auto Loan Per Diem Calculator

Auto loan calculator for daily per diem interest and related metrics

The Auto Loan Per Diem Calculator helps borrowers and lenders compute daily interest charges (per diem) using both 360-day and 365-day conventions. It calculates per diem interest, daily rates, monthly interest, interest accumulation over custom day counts, the effective annualized rate, and reverse calculations such as deriving APR, loan balance, or per diem rate from known variables. This tool is essential for understanding payoff amounts, early payment interest, and lender interest methods.
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