SMART CALCULATOR / PLAN WITH CONFIDENCE
Estimate payoff time, interest, and the benefit of paying extra each month on a revolving debt balance.
Use boundary
We simulate each monthly interest charge and payment until the balance reaches zero.
Each month: interest = balance x monthly rate; new balance = balance + interest - payment.
What you provide
What you receive
Use boundary
Actual card calculations can use daily balances, fees, minimum-payment rules, and changing rates.
Results are estimates for planning. Confirm rates, rules, and source documents before making a financial, health, or purchase decision.
Reviewed reference factors