Loan repayment calculator
Compare payments and total interest
How it works
Compare equal-payment, equal-principal and interest-only loans using a monthly rate of annual percentage / 12. The schedule excludes fees, daily interest adjustments and prepayments.
Example
A principal of 1,200 at 0% over 12 months costs 100 per month.
How to use
- Enter your values or choose a local file.
- Choose settings and run the tool.
- Review the result, then copy it or download the file.
Common questions
What rules does this tool use?
Compare equal-payment, equal-principal and interest-only loans using a monthly rate of annual percentage / 12. The schedule excludes fees, daily interest adjustments and prepayments.
Are my inputs uploaded?
Calculations, texts and files are processed in this browser. The currency tool requests only currency codes from our server.
Free tool · Inputs processed locally · Updated October 5, 2026