Free Money & Finance Calculators
Finance calculators built the Tallyloom way: free, running entirely in your browser, and showing their formulas and assumptions so you can check the math. Twelve calculators are live below, from mortgage and amortization to retirement projection and debt payoff.
About these tools
The Money section brings Tallyloom's show-your-work approach to personal finance: every calculator states the formula it uses and the assumptions behind it, links its sources, and runs entirely in your browser — your financial figures are never uploaded.
Twelve calculators are live: mortgage, amortization schedule, loan payoff, auto loan, compound interest, debt snowball, retirement projection, budget planner, tip, sales tax, discount, and hourly-to-salary. Each shows its formula and assumptions inline, and payment math is verified against standard amortization values.
Everything here is informational only. The calculators can't know your full financial picture, and they are not a substitute for advice from a qualified financial professional.
Frequently asked questions
Are these finance calculators free?
Yes — free, no account, no limits, like every Tallyloom tool.
Is my financial data private?
Yes. Balances, debts, and rates you enter are processed entirely on your device and never sent to a server.
Is this financial advice?
No. The calculators apply standard published formulas for general information. For decisions about your money, consult a qualified financial professional who knows your situation.
Will more money calculators be added?
Yes — the roadmap is driven by what visitors actually use. A paycheck/take-home calculator is under consideration but held to a high bar: withholding tables change yearly across federal and state levels, and we won't ship a calculator whose numbers we can't keep verifiably current.
Guides
Longer explainers that go behind the tools on this page — the formulas, the assumptions, and worked examples you can check yourself.
- Debt Snowball vs. Avalanche: The Math and the PsychologyThe avalanche method always wins on paper — so why do so many people pay off more debt with the snowball? A worked example with real numbers, and how to choose.
- How Compound Interest Actually WorksThe formula behind compound growth, what compounding frequency really changes, the Rule of 72 — and a worked 10-year example you can verify yourself.
Looking for something else? Try Converters · Education & Study or browse all tools.
When they launch, finance calculators will be informational only — helpful for planning, but not a substitute for advice from a qualified financial professional. In the meantime, try our live Currency Converter or browse all tools.