Finance Calculators
Free tools for mortgages, taxes, investments, loans, and retirement. No account required — results stay in your browser.
Mortgage Calculator
Estimate monthly payment, total interest, and amortization schedule.
Mortgage Affordability Calculator
Find out how much house you can afford based on income and debt.
Property Tax Calculator
Estimate annual property tax from assessed value and local rate.
Income Tax Calculator
Estimate federal income tax liability using current US brackets.
Compound Interest Calculator
Project investment growth with variable compounding frequency.
Loan / EMI Calculator
Calculate monthly loan payment, total repayment, and total interest.
SIP Calculator
Project mutual fund returns from systematic monthly investments.
FIRE Retirement Calculator
Find your financial independence number and target retirement date.
Cost Comparison Calculator
Compare two options by upfront cost, monthly cost, and time horizon.
Percentage Calculator
Calculate percentages, discounts, tips, and percentage change.
About these finance calculators
Whether you're planning a home purchase, estimating your tax bill, projecting investment growth, or calculating when you can retire, these tools give you instant, no-login answers. All calculations run locally in your browser — no data is sent to any server.
Start with the mortgage calculator if you're buying a home, or the FIRE retirement calculator if you're planning long-term financial independence. The compound interest calculator is the best starting point for understanding how savings and investments grow over time.
Frequently asked questions
Are these calculators accurate enough for real financial decisions?
These tools are accurate for estimation and planning purposes. Mortgage, tax, and investment outputs are based on standard formulas used by financial professionals. They do not account for every individual variable — local tax surcharges, AMT exposure, specific loan terms, or investment-specific fee structures — so treat outputs as informed starting points and verify significant decisions with a licensed financial advisor or your lender.
Why don't these calculators require a login?
All calculations run entirely in your browser using JavaScript. No data is transmitted to any server, and nothing is stored beyond your current session unless you bookmark the URL. This design prioritizes privacy and speed over account-based personalization.
Which calculator should I use first for home buying?
Start with the mortgage affordability calculator to establish your budget ceiling based on income and existing debt. Then use the mortgage calculator to model specific loan amounts and rates. Add the property tax calculator to estimate the full monthly housing cost including escrow. Running all three gives you a complete picture before you make an offer.