Finance

Loan payments, interest and percentages, with the full schedule shown.

• Loan Payment Calculator05·01Calculate monthly payment, total interest and payoff date, with a full amortisation schedule.
• VAT Calculator05·02Add VAT to a price or take it back off. Removing it is a division, not a subtraction — this shows both answers and the gap.
• Compound Interest Calculator05·03Project savings growth with regular contributions, any compounding frequency, and a year-by-year table.
• IBAN Validator05·04Check an IBAN's checksum and structure against the official registry, and see which bank and country it belongs to.
• Currency Converter05·05Convert between 50 currencies at the mid-market rate, rounded to each currency's real decimals, with the rate's publication date always on screen.
• Invoice Generator05·06Fill in the parties and the lines, get a clean PDF invoice — totals computed in integer cents, VAT per your rate, nothing sent to any server.
• Discount Calculator05·07Sale price and savings — forwards, backwards from the tag price, and stacked discounts that multiply the way shops actually apply them.
• ROI Calculator05·08Return on investment with honest annualisation — the geometric rate, not gain divided by years — plus doubling time by the exact formula and the rule of 72.
• Tip Calculator05·09Tip, total and the per-person share when the bill splits — with a round-the-total option that adjusts the tip honestly and shows the percentage it became.
• AZ Salary Calculator05·10Azerbaijani net salary from gross — or gross from net — with income tax, DSMF, unemployment and medical insurance itemised for both sector regimes.