Calculators & Tools 2026

Credit card math is easy to get wrong when the fine print works against you: an intro APR that quietly expires, a welcome bonus that costs more in annual fees than it pays out, a minimum-payment schedule that doubles what you owe. These calculators replace the mental arithmetic with a repeatable process you can run before you apply and before you change how you pay.

Each tool focuses on one job. The credit-card interest calculator prices a balance under your APR and payment plan, showing how long payoff takes and what it costs in interest; the balance-transfer savings calculator compares moving that balance onto a 0% intro APR transfer card against staying put, including the transfer fee; and the rewards-value calculator turns earn rates, welcome offers and annual fees into a first-year and ongoing dollar value, so cards can be compared on net worth rather than headline points. Every tool runs entirely in your browser — nothing is uploaded, stored, or shared.

The defaults on each page are conservative, industry-standard values — typical APR ranges, common transfer fees, standard redemption rates — so a first-time visitor gets a meaningful answer without knowing every fine-print detail. Once you know your card's actual APR, fee schedule and reward rates, entering those figures gives results that closely match your issuer's own statements. Results are estimates for planning and education only: issuers calculate interest day by day, promotional windows vary by offer, and bonus terms change, so confirm the numbers against your cardholder agreement before making a decision.

The payoff calculator rounds out the set: enter your balance, APR and monthly payment to get a debt-free date under minimum payments, a fixed amount or an aggressive plan, with the interest cost of each route side by side — the number most borrowers wish their statement showed.