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.
Calculators cover everyday math: percentages, loans with full amortization tables, unit conversions across length, mass, volume, speed and data, age computation, date arithmetic, base-2/36 conversion, BMI, and live multi-currency exchange rates. Each calculator shows step-by-step formulas and works instantly on any device. Students, professionals, shoppers, and analysts use them for quick accurate calculations without downloading an app.
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.
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.