Coupon Rate Calculator
Calculate coupon rate — loan payoff and credit analysis tool.
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Months to Payoff
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Total Interest
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Total Paid
Recent Calculations
What Is Coupon Rate?
Coupon Rate calculates how long it takes to pay off a loan and the total interest cost.
Formula
Months = −ln(1 − B×r/P) / ln(1+r), where B=balance, r=monthly rate, P=paymentFrequently Asked Questions
What if my payment is too low?
If the monthly payment doesn't cover the interest, the balance grows and will never be paid off.