This calculator helps you estimate how much time and interest you can save over the life of your loan if you make a one-off lump sum repayment into your loan facility. Or it calculates the effect of making a lump sum repayment on your loan.
Conclusion: No rounding is done throughout calculation whereas repayments are rounded to at least the nearer cent in practice. The final repayment after the increase in repayment amount will be a partial repayment as required to reduce the loan balance to zero without negative owing amount.