Finance Calculators
◆ Money & PlanningWhat a loan really costs, what savings grow to and whether buying beats renting, worked out with real amortisation rather than rough estimates.
Mortgage Calculator
Principal, interest, property tax, home insurance and PMI shown as proportional bars, plus the month mortgage insurance falls away.
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Compound Interest
Future value and a period by period growth schedule, at every frequency from annual to continuous, with the effective annual rate and the simple interest comparison beside it.
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Tip Calculator
Tip, total and each person's share, with the tax handled your way and the odd cent settled so the split adds up.
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Loan Calculator
Enter an amount, a rate and a term to get the complete amortisation schedule: every payment split into interest and principal, the balance after each one, and what an extra payment saves.
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Investment Calculator
A starting amount, regular contributions and a return, projected year by year with the nominal balance and the inflation adjusted balance side by side.
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Car Payment Calculator
Work out a car payment the way the finance office does: price, trade-in allowance, outstanding payoff, state sales tax and dealer fees, then see the total cost split into bars.
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401(k) Calculator
Drag the sliders to project your 401(k), with the 2026 IRS limits applied and the final balance broken into contributions, employer match and growth.
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Rent vs Buy Calculator
Stack the total cost of renting against the total cost of buying, part by part, and find the year buying overtakes.
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Dates, grades, unit conversions, random draws and number bases.
Finance calculators for loans, savings and the big decisions
The finance calculators answer the questions that decide what a deal is worth: what the monthly payment is, how much of it is interest, and what the whole thing costs by the end. Every projection is built from a real month-by-month schedule, so the totals hold up rather than approximating.
The mortgage, loan and car payment calculators work from the price, rate and term through tax, fees and a trade-in to the payment you would actually sign for. The compound interest, investment and 401(k) calculators run the same maths in the other direction, splitting a final balance into what you paid in and what growth added.
For the decisions with no obvious answer, the rent versus buy calculator reports the break-even year at which a buyer overtakes a renter, and the tip calculator settles the bill at the end of the night. None of these pages is financial advice, and each one states the assumptions it is making.
Frequently Asked Questions
Are these finance calculators free to use?
Yes. Every finance calculator here is 100% free, with no sign-up and no limits, and each one runs entirely in your browser.
Do these calculators count as financial advice?
No. They are information tools that show the arithmetic behind a payment or a projection. For decisions that matter, talk to a qualified adviser.
Are my figures sent anywhere?
No. Salaries, balances and loan details are calculated locally in your browser, and nothing you type is uploaded, stored or shared.
Do the results include tax and fees?
Where they apply, yes. The car payment calculator handles sales tax, title and dealer fees, and the mortgage and rent versus buy pages include property tax, insurance and maintenance. Investment projections are gross, so subtract fund fees from the return you enter.