Calculators · Free to use
Loan Calculator
Estimate a fixed-rate loan: monthly payment, total interest, and total amount repaid over the term.
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How to use the loan calculator
- 1Enter the loan amount.
- 2Enter the annual interest rate and term in years.
- 3Read the monthly payment and total interest.
This tool runs in your browser. The text, files and values you enter are not uploaded to our server.
About the loan calculator
A loan calculator estimates the monthly payment, total interest and total repaid on a fixed-rate, fully amortizing loan from the amount, annual rate and term. Use it for business loans, equipment finance or personal borrowing to see the true cost before signing.
Frequently asked questions
Is this tool free?
Yes — completely free, no signup, no watermark and no limits. Startup OG funds the site through its directory and partner program, not paywalled tools.
How is a monthly loan payment calculated?
With the amortization formula P·r ÷ (1 − (1+r)^−n), where r is the monthly rate and n the number of months. This tool applies it for you.
Does this include taxes, fees or insurance?
No — it estimates principal and interest only. Add origination fees, taxes or insurance separately for the all-in cost.
How does the term affect total interest?
A longer term lowers the monthly payment but increases total interest paid, sometimes substantially. Compare terms above.