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Loans, percentages, units, dates, currency
8 practical calculators: percentages, loans with full amortization, units, age, dates, base conversion, BMI, and live multi-currency exchange rates.
Every tool below is free, runs instantly in your browser, and never uploads your data.
Percentage of, percentage change and percentage increase/decrease.
Monthly payment, total interest and full amortization schedule.
Length, weight, temperature, data, area, volume, time and speed conversion.
Exact age in years, months, days, plus days until your next birthday.
Days between dates, add/subtract days from a date, weekday lookup.
Convert between decimal, hex, binary and octal with ASCII view.
Body Mass Index with healthy-range guidance.
Live exchange rates for 160+ world currencies, auto-detecting your country.
Live market rates updated daily from open exchange-rate providers, cached so the converter works even offline.
Using the standard PMT formula, with a full month-by-month principal vs interest table.
Yes — every calculator is fully responsive with big touch-friendly inputs.