Loan amortization calculator

Build an amortization schedule and test extra payments.

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How to use

  1. 1Enter principal, APR, term, frequency and optional extra.

About

The table shows the first and last payments to stay compact on mobile.

Loan amortization calculator

See payment, interest and balance evolution in a compact amortization table.

Each period, interest = balance × rate; principal paid = payment − interest. Extra payments shorten the term.

Yes. Frequency changes the periodic rate and number of schedule periods.

Calculations run locally in your browser; entered financial values are not sent to a server.

Practical example

  • Enter principal, rate and months, then compare the schedule with an extra payment.

Limitations and notes

  • Use positive rates, terms and amounts. Results are estimates and do not include lender-specific rules or fees.

How to use

  1. 1Enter principal, APR and term.
  2. 2Choose frequency and extra payment.
  3. 3Review summary and schedule.

Frequently asked questions

Can I choose payment frequency?

Yes. Frequency changes the periodic rate and number of schedule periods.