What are you trying to figure out?
Choose the question closest to the decision you're working through.
Compare payoff time and interest with a larger monthly payment or one-time payment.
Test extra paymentsFind the monthly amount needed to reach a target payoff month.
Set a payoff goalCompare the promotional rate, transfer fee, payoff time, and balance left after the promotional period.
Compare a balance transferCompare snowball and avalanche by interest, payoff order, and timing.
Compare payoff methodsUnderstand what changes the result
Use these guides for more context before changing a payment, payoff method, or lower-rate option.
Compare payment size with payoff time, interest cost, and monthly budget.
Read guide Payoff timing How Long Does It Take to Pay Off Credit Card Debt?See how balance, APR, payment size, and minimum-payment rules affect payoff time.
Read guide Lower-rate comparison Balance Transfer vs Personal LoanCompare promotional APR, loan rates, fees, monthly payments, and total cost.
Read comparison Payoff strategy How to Pay Off Debt FasterSee which changes can shorten payoff time, reduce interest, and make the plan easier to maintain.
Read guideCompare payoff choices using consistent calculations
Calculators built to help you compare one change at a time
DebtOptimizerHub is built and maintained by Michael Brady, a software developer. The calculators, guides, and worked examples are designed to make repayment math easier to understand and compare.
- Each tool explains how interest, payments, fees, and payoff timing are calculated.
- Several calculators can carry your numbers into the next comparison.
- Results focus on payoff time, interest, payment size, fees, and remaining balance.