Principal, annual rate %, time in years—interest and total repayment.
No—interest = principal × (rate% ÷ 100) × years in one lump; maturity = principal + interest. Negative years pass validation but behave mathematically as signed simple interest.
This calculator uses plain decimal numbers. If a result looks wrong, check whether you used a comma instead of a dot (or vice versa) where the field expects one.
Educational estimate only.