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Loan Calculator

Calculate monthly repayments, total interest payable and total cost for any loan.

Monthly PaymentTotal Interest
per month

How to use this calculator

Enter the amount borrowed, annual interest rate and loan term, choose the term unit, then calculate the repayment and total interest breakdown.

Useful real-world examples

  • Comparing repayments for two loan amounts or terms.
  • Testing how a higher deposit or extra borrowing changes the repayment.

Important detail

Real loans may include fees, variable rates, redraw rules and repayment timing that change the final cost.

Frequently Asked Questions

Monthly repayment uses the standard amortisation formula: P × r(1+r)^n / ((1+r)^n - 1), where P is principal, r is monthly rate, and n is total months.

This calculator shows principal and interest only. Check with your lender for any additional fees or charges.

Total interest is the total amount paid above the principal over the life of the loan.