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Finance Calculator Hub

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Run the numbers before you sign anything.

Finance Calculator Hub gives you precise, transparent answers on mortgages, loans, savings, debt payoff, budgeting and retirement — with the full working shown, not just a single figure.

Browse all calculators Start with a mortgage
  • Results update as you type
  • Your figures never leave your device
  • Full schedules and interest breakdowns

Most used this month

Every calculator, grouped by job

Each tool has its own page with the formula explained, an interest breakdown and answers to the questions people actually ask.

Retirement

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Long-horizon projections for contributions, growth and withdrawals.

Popular finance calculations

The questions people bring here most often, and the tool that answers each one.

Guides that explain the maths

Longer reads for the decisions behind the numbers: how interest is actually charged, what compounding does over decades, and which debt to clear first.

Borrowing money

A loan payment is set by three things: the amount borrowed, the interest rate and the number of months. Change any one and the payment moves. Start with the mortgage calculator for a home, the auto loan calculator for a car, or the loan and EMI calculator for anything else.

Growing money

Savings and investments grow on the balance you already have, so time matters more than the rate. Project a balance with the compound interest calculator, plan a target with the savings goal calculator, and look decades ahead with the retirement calculator.

Clearing debt

Every extra dollar aimed at a balance stops earning interest for the lender permanently. See the effect with the credit card payoff calculator or the loan payoff calculator.

Knowing where you stand

Before any big decision, check the three numbers lenders check: what comes in and goes out each month with the budget calculator, your debt-to-income ratio, and your net worth.

Common questions

Are these finance calculators free?
Yes. Every calculator on the site is free, needs no account and has no usage limit. The site is supported by clearly labelled advertising.
Do my figures get stored or sent anywhere?
No. Every calculation runs in your browser, so the amounts, rates and balances you type never reach a server and are gone when you close the tab.
How accurate are the results?
Payments use the standard amortization formula lenders use, and growth projections compound period by period rather than using shortcuts. Real quotes can still differ because of fees, rounding and the exact day interest is charged.
Which calculator should I use for a home loan?
Use the mortgage calculator: it includes property tax, insurance and HOA alongside principal and interest, and shows the full amortization schedule.
What is a good debt-to-income ratio?
Most mortgage lenders look for a back-end ratio at or below 36%, and many will stretch to 43%. The debt-to-income calculator shows both your front-end and back-end figures.
Can I see how extra payments change a loan?
Yes. The mortgage, loan and payoff calculators all accept an extra monthly amount and show the months saved and the interest avoided.
Is this financial advice?
No. These are calculation tools for your own planning. Figures are estimates and should not replace advice from a licensed professional.
Do the calculators work on a phone?
Yes. Every page is built for small screens and works offline-style in the browser once loaded, with no app to install.

Why the results here are trustworthy

Standard formulas. Payments use the conventional amortization formula; growth projections use period-by-period compounding rather than shortcuts.

Nothing hidden. Every page states what is and is not included, and shows the assumptions driving the result.

No data collection. Calculations run client-side. Amounts, rates and balances stay on your device.