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Debt & Loans

Plan a loan, compare payoff strategies, and see the true cost of what you borrow.

Loan Calculator

Works for any fixed-rate loan. Enter the amount, rate and term to see your monthly payment and exactly how much the loan costs in total.

Most used

Auto Loan Calculator

Work out the monthly payment on a car after your down payment and trade-in, plus the total interest you'll pay over the loan.

Credit Card Payoff Calculator

Credit card interest compounds fast. See how long your balance takes to clear at a given monthly payment, and how much sooner a bit more would finish it.

Debt Payoff Calculator

Compare two proven strategies. Avalanche targets the highest rate first to save the most money; snowball clears the smallest balance first for quick wins. Set your debts and an extra amount to throw at them.

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PlainSums' calculators are for general education and planning only. They produce estimates based on the figures you enter and do not account for every fee, tax or change in rate. They are not financial advice — for decisions about your money, speak to a qualified, regulated professional.

© 2026 PlainSums. For education and planning only — not financial advice.