Financial Calculator Suite
Tip, loan, mortgage PITI, ROI/CAGR, and compound interest — all in one tool
How to use
- Pick a calculator tab
- Enter your numbers
- Review results live
Use cases
- Personal finance
- Investment planning
- Mortgage shopping
About the Calculator Suite — Tip, Loan, Mortgage, ROI, Compound Interest
Five of the most-searched financial calculators bundled into one tool — tip / loan / mortgage / ROI / compound interest. Each one does its job precisely (mortgage includes the tax and insurance pieces most online calculators omit; compound interest accepts regular contributions at configurable frequency). All math runs in your browser.
Features
- Tip calculator with bill splitting
- Loan amortization (monthly payment, total interest)
- Mortgage PITI breakdown (principal + interest + tax + insurance)
- ROI + annualized CAGR
- Compound interest with recurring contributions, configurable compound frequency
How it works
- Pick a calculator tab.
- Enter your numbers.
- See results update live.
Frequently asked questions
Is compound interest realistic?
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The math is exact. Real-world returns aren't guaranteed — 'S&P 500 averages 10%/year' is a historical average with wild year-to-year variance. Use the calculator for planning, not promises.
Why does my mortgage PITI differ from my lender's quote?
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We compute principal + interest precisely. Tax and insurance are estimates — your lender has exact figures from the property assessor and insurance provider. We're ±5% of a typical quote.
Does the loan calculator handle variable-rate loans?
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No — assumes fixed rate. For ARM or variable, run the calculation at the current rate and again at the cap rate to see the range.
What's CAGR?
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Compound Annual Growth Rate — the constant rate of return that would produce the same ending value. It smooths out year-to-year variance so you can compare investments of different durations.
Can I plan for early mortgage payoff?
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Add your extra monthly payment as a 'contribution' in the compound interest calculator (though that's aspirational). A full amortization table is on the roadmap.