Financial calculators, simplified.
Free, fast, and accurate tools to help you make smarter financial decisions. Real-time results, interactive charts, no sign-up required.
Savings & Investing
Grow your money and plan for the future.
Compound Interest Calculator
See how your money grows over time with compound interest and monthly contributions.
Open calculatorSavings Goal Planner
Find out how much to save each month to reach your financial goal by your target date.
Open calculatorInvestment Return Calculator
Project returns from stocks, ETFs, and index funds with inflation-adjusted results.
Open calculatorRetirement & FIRE Calculator
Project your retirement savings, find your FIRE number, and see when you can retire.
Open calculatorLoans & Mortgages
Understand borrowing costs and repayment.
Mortgage Calculator
Estimate monthly payments, total interest, and a full amortization schedule.
Open calculatorLoan Amortization Calculator
Break down any loan into a payment-by-payment schedule of principal and interest.
Open calculatorCar Loan Calculator
Calculate auto loan payments with down payment, trade-in, and sales tax.
Open calculatorRent vs Buy Calculator
Compare the long-term cost of renting versus buying a home over time.
Open calculatorMoney Tools
Everyday financial conversions and planning.
Currency Converter
Convert between 28 major currencies with real-time exchange rates.
Open calculatorInflation Calculator
See how inflation erodes purchasing power and what money will be worth over time.
Open calculatorAPR to APY Calculator
Convert between APR and APY for any compounding frequency to compare rates fairly.
Open calculatorWhy Use FinCalc?
Making smart financial decisions starts with understanding the numbers. FinCalc gives you free, accurate financial calculators that update results in real time — no sign-up, no waiting, no "Calculate" button. Just enter your numbers and see instant, interactive charts and detailed breakdowns.
Whether you're planning for retirement, comparing mortgage options, figuring out how much car you can afford, or deciding whether to rent or buy a home, our calculators help you model different scenarios and make data-driven choices. Every tool includes year-by-year projections, clear explanations of the math behind the results, and frequently asked questions to deepen your understanding.
All calculations run entirely in your browser — we never store your financial data. Our tools cover savings and investing, loans and mortgages, currency conversion, inflation, and interest rate comparisons. Each calculator is built with industry-standard formulas and reviewed for accuracy.
Frequently Asked Questions
- Are these financial calculators really free?
- Yes, every calculator on FinCalc is 100% free to use with no limits. There are no premium tiers, no paywalls, and no account required. We believe everyone deserves access to quality financial planning tools.
- How accurate are the results?
- Our calculators use industry-standard financial formulas — the same math used by banks and financial advisors. Results are meant for educational and planning purposes. For major financial decisions, we recommend consulting a qualified financial professional.
- Is my financial data safe?
- Absolutely. All calculations happen locally in your browser. We never send your numbers to a server or store any personal financial information. Your data stays on your device.
- Which calculator should I start with?
- If you're saving or investing, start with the Compound Interest Calculator to see how your money grows over time. If you're buying a home, the Mortgage Calculator breaks down payments, interest, and amortization. For retirement planning, try the Retirement & FIRE Calculator.