About FinWiser
We build free, accurate financial calculators and plain-English guides so that anyone can understand their numbers before making a big money decision.
Our mission
Financial decisions — buying a home, financing a car, paying off debt, starting to invest — are among the most consequential choices most people make. Yet the math behind these decisions is often buried in fine print, explained poorly, or hidden behind expensive advisors.
FinWiser exists to fix that. Every calculator we build and every article we write is designed to help you understand why a number is what it is — not just what the number is.
What we offer
Free calculators
Six financial calculators covering mortgages, car loans, loan amortization, debt payoff, compound interest, and mortgage comparisons. No signup, no ads blocking your results.
Plain-English guides
Over 20 articles on personal finance topics written to explain the concepts behind the numbers — not just repeat common advice.
Full amortization schedules
Every loan calculator shows a complete payment-by-payment breakdown so you can see exactly where your money goes each month.
Save your calculations
Create a free account to save and revisit your calculations — useful when comparing scenarios over time.
Accuracy & editorial standards
All calculators use standard financial formulas — the same formulas used by lenders, banks, and financial institutions. We document the methodology behind each tool and review calculations regularly to ensure accuracy.
Our articles are researched using publicly available financial data and reflect widely accepted personal finance principles. We cite averages (such as interest rate benchmarks) that can change over time and encourage readers to verify current rates with their lender.
Important: FinWiser is an educational tool, not a licensed financial advisor. The information on this site is for informational purposes only and should not be construed as financial, tax, or legal advice. Always consult a qualified professional before making significant financial decisions.
Our calculators
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Mortgage Calculator
Full PITI payment with PMI, extra payments, and amortization schedule.
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Car Loan Calculator
Monthly payment, total interest, sales tax, trade-in, and affordability check.
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Loan Amortization Calculator
Complete amortization schedule for any loan amount, rate, and term.
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Debt Payoff Planner
Avalanche vs. snowball comparison with custom extra payment.
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Compound Interest Calculator
Investment growth with monthly contributions and configurable compounding.
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Compare Mortgages
Side-by-side comparison of up to three mortgage scenarios.
Feedback & corrections
Found an error in a calculation or article? We want to know. Accuracy matters on financial content and we take corrections seriously. You can reach us at hello@finwiser.net.