Calculator inputs
Estimate monthly payment, total interest and total cost for an amortising loan.
Enter the amount in the currency you are using. Keep the same currency across money fields.
Enter the annual percentage rate, not a decimal. For example, enter 6.5 for 6.5%.
Enter the length of the period using the unit shown in the label.
Controls rounding in the displayed result only; it does not change the underlying calculation.
How this calculator works
The calculator uses a standard amortising loan formula to estimate the fixed monthly repayment and total interest across the loan term.
Change one input at a time to compare scenarios clearly. This is useful for planning, but it should not be treated as a final quote, tax calculation, lending decision, employment advice or professional recommendation.
Formula
Worked example
A $500,000 loan over 30 years at 6.5% has an estimated principal-and-interest payment of about $3,160 per month.
Frequently asked questions
What is this calculator used for?
Estimate monthly payment, total interest and total cost for an amortising loan.
Can I rely on this result?
Use the answer as a planning estimate and verify important numbers with official documents, lenders, payroll records, tax guidance or qualified professionals.
What should I check next?
Use the related calculator links below to compare adjacent scenarios in the same topic cluster.