Monthly payment, total interest and full amortization schedule.
Calculate monthly payments for any loan (amount, annual rate, term) with a full amortization table showing principal vs interest each month.
100% client-side — zero uploads, maximum privacy
Instant results — no waiting for server processing
Secure — your data never leaves your browser
Free to use — no sign-up required
Real-time calculation as you type — no submit button needed
Step-by-step breakdowns for full transparency
Amortization schedules, unit conversions, and health formulas
Bookmarkable results for quick reference
Works offline after initial page load
Compare monthly payments across different loan offers
Calculate total interest paid over a mortgage lifetime
Model amortization schedules for auto financing
Evaluate refinancing options with new rate scenarios
Plan debt payoff timelines with extra payment inputs
The standard amortization formula (PMT). The table shows running balance and cumulative interest month by month.
Percentage of, percentage change and percentage increase/decrease.
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Exact age in years, months, days, plus days until your next birthday.
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Body Mass Index with healthy-range guidance.