What is a amortization?
An amortization calculator separates each fixed monthly payment into interest and principal. Early payments usually contain a larger interest share; as the balance falls, more of each payment reduces principal. This simplified schedule assumes a constant rate and on-time monthly payments.
Formula and calculation method
Monthly interest = opening balance × monthly rate. Principal paid = monthly payment − monthly interest. Closing balance = opening balance − principal paid.
The result is only as reliable as the inputs and assumptions. This tool is educational and does not replace professional financial, medical, legal or academic advice.
How to use this calculator
- Enter the values requested in the calculator.
- Review the result panel; it updates when an input changes.
- Change one assumption at a time to compare scenarios.
- Check the formula and limitations before acting on the estimate.
Frequently asked questions
Is this amortization calculator free?
Yes. You can use this calculator in your browser without creating an account.
How accurate is the result?
It applies the displayed formula to the values you provide. Real-world outcomes can differ because of fees, changing rates, individual circumstances or rules not represented in this estimate.
Are my inputs stored?
No. The calculation runs locally in your browser and the values are not submitted to FastSEOHub.