Financial calculators for real-life money decisions
Calculate payments, payoff timelines, savings, and borrowing costs with clear, transparent tools.
Free to use · No account required · Educational estimates · Calculations explained
Popular calculators
View all calculators- Debt & creditCredit Card PayoffSee how long it could take to pay off your credit card balance.Calculate
- Home & mortgageMortgage RefinanceEstimate payment changes and break-even from your refinance assumptions.Calculate
- Debt & creditDebt PayoffCompare snowball and avalanche strategies with your balances and APRs.Calculate
All calculators
Browse the full collection by topic, or use search above to jump straight to a tool.
Home & mortgage
Estimate refinance tradeoffs and simplified home-equity borrowing capacity from assumptions you enter.
Debt & credit
Explore payoff timelines for cards, mixed debts, and standard student-loan amortization models.
- Debt & creditDebt PayoffCompare snowball and avalanche strategies with your balances and APRs.Calculate
- Debt & creditStudent Loan RepaymentEstimate fixed-rate payments, interest, and payoff time for student loans.Calculate
- Debt & creditCredit Card PayoffSee how long it could take to pay off your credit card balance.Calculate
Auto loans
Estimate vehicle financing with a documented sales-tax assumption, fees, APR, and term.
Planning & protection
Educational coverage and savings projections — not personalized recommendations or guaranteed outcomes.
Learn
Short guides that explain the ideas behind the calculators.
- How credit card payoff time is calculatedUnderstand how months to pay off a card, total interest, and the final payment are estimated from balance, APR, and a fixed monthly payment — including when payoff is impossible under those assumptions.
- How mortgage refinance savings are calculatedLearn how estimated refinance payment changes, remaining interest, and a simple payment break-even are derived from the loan assumptions you enter — and what those figures leave out.
- Debt snowball vs avalanche: how the orderings differLearn how snowball and avalanche repayment orderings work, what they change in a month-by-month payoff model, and how to compare them with your own balances — without treating either as advice.
- How auto loan interest worksUnderstand how an educational auto loan estimate builds amount financed, applies a documented sales-tax assumption, and calculates fixed-rate monthly interest and amortization from the terms you enter.
Why use these calculators?
Free to use
Open any calculator and run estimates without creating an account.
Clear calculations
Each tool shows results from the inputs you provide, with assumptions stated on the page.
Transparent methodology
Formulas and limitations are documented so you can see how estimates are produced.
Runs in your browser
MVP calculators process your numbers in the browser — not sent to a backend to compute.
Read more on methodology and about.