Guide · Loans

How to use a loan calculator

Educational guide · Updated · About 6 min read

John Rey Balais, developer of Nestfigure Written & maintained by John Rey Balais Developer · Nestfigure
  1. Enter the loan amount.
  2. Enter an APR from a disclosure you want to model.
  3. Choose term in months (or use presets).
  4. Optional: add extra monthly principal.
  5. Read payment, interest, term comparison, and schedule.

Example: $10,000 · 8% · 36 months

What it is not

  • Not a credit application
  • Not fees, insurance, or variable-rate modeling
  • Not advice on whether to borrow

How we calculate · Questions

Frequently asked questions

What inputs do I need?

Loan amount (principal), APR, term in months, and optional extra monthly payment.

Can I share a prefilled link?

Yes—use principal, apr, months, and extra query parameters on the loan calculator URL.

Related tool

Open the free loan calculator

Payment, interest, amortization schedule.

Open loan calculator

Sources linked above include U.S. government materials (for example CFPB, FDIC, NCUA, BLS, IRS) where noted. Sample math uses only labeled Nestfigure assumptions—not bank quotes, job offers, or personalized advice. Last reviewed: August 9, 2026.

YMYL notice: This site is for education only. It is not financial, tax, or investment advice. Nestfigure is not a bank, credit union, broker, investment adviser, or fiduciary. Product terms, rates, and penalties vary—always read your institution’s disclosures before acting. Calculator results are mathematical estimates, not bank quotes.