Current Balance ($)
Please enter a valid positive number.
APR (%)
Please enter a valid APR (0-100).
Monthly Payment ($)
Please enter a valid positive number.
Calculate
Results
Months to Pay Off:
Total Interest Paid:
$
Total Paid:
$
Formula:
The calculator uses the formula for the number of periods (n) = log((P - r*B)/P) / log(1+r), where P is monthly payment, r is monthly interest rate (APR/12/100), and B is balance. Then total interest = n*P - B.