Free Financial Calculators
CentCompass offers free, accurate calculators for the US — mortgage, paycheck, federal income tax, 401(k), retirement, and more.
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Free calculators for real money decisions
Every calculator on CentCompass runs entirely in your browser — the figures you type are never sent to a server or stored by us, as our privacy policy sets out. Each one is powered by a small, unit-tested calculation engine rather than a spreadsheet, and every tax figure comes from a dated registry of official IRS and SSA publications, so the numbers in the explanations always match the numbers in the results.
The tools are grouped into six areas that mirror how the questions actually come up: buying and financing a home, borrowing and paying off debt, understanding your paycheck, estimating federal income tax, saving and investing, and planning for retirement. Each area has a hub that explains when to use which calculator and how the closely related ones differ.
We do not sell financial products and we are not a registered investment advisor. The calculators are educational tools — read our methodology, data sources, and who we are, and the terms of service that govern their use.
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- Investing Calculators
- Free investing calculators to project growth, compare contributions, and understand compound interest.
- Retirement Calculators
- Retirement planning calculators: project your nest egg, 401(k), Roth IRA, and how much you need to retire.
- Salary & Paycheck Calculators
- Salary and paycheck calculators: estimate take-home pay, gross vs net, and pay-frequency conversions.
- Tax Calculators
- Tax calculators to estimate federal income tax, effective and marginal rates, and deductions.
- Real Estate & Mortgage Calculators
- Real estate calculators: mortgage payments, amortization schedules, and home affordability.
- Debt & Loan Calculators
- Debt and loan calculators: auto loans, personal loans, and amortization with payoff projections.
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How this page is produced
Editorial process. CentCompass is maintained independently, and this page is written and checked against the official publications listed above before it goes live. There is no separate editorial reviewer. This page was last checked on . See our editorial policy.
How the calculations work. Every result comes from a small, unit-tested calculation engine rather than a spreadsheet or a hardcoded table. Loans use the standard amortization formula, growth uses compound-interest math, income tax applies the federal progressive brackets, and payroll applies Social Security and Medicare rules. Our methodology sets out each one.
Where the figures come from. Tax brackets, standard deductions, FICA parameters, and contribution limits are stored once in a dated registry and read directly by the calculators — the same values appear in the text above, so the two can never drift apart. Each figure records its source, effective tax year, and review status on our data sources page.
Update policy. Regulatory figures are checked against their primary source when the IRS, SSA, or another authority publishes new values — typically each autumn for the following tax year — and again at the scheduled review date recorded for each dataset. Figures that have not been checked yet are marked as draft on the data sources page until that check is complete.
Educational purposes only — not financial, tax, or investment advice (disclaimer).