Reviewed by: David Chen, CFA
David Chen is a Certified Financial Analyst with over 10 years of experience in mortgage analytics and web-embedded calculators.
David Chen is a Certified Financial Analyst with over 10 years of experience in mortgage analytics and web-embedded calculators.
Copy-and-paste this free mortgage calculator code for website to give visitors instant estimates of monthly P&I, total interest, and payoff date—no external plugins required.
Mortgage Calculator Code for Website
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Not calculated yet.
Mortgage Formula
Monthly P&I: M = P × [ r(1+r)^n ] / [ (1+r)^n – 1 ]
Total Interest: (M × n) – P
Formula Sources: Investopedia | Bankrate
Variables
- P: Loan amount after down payment.
- r: Monthly interest rate (annual rate ÷ 12).
- n: Total monthly payments (years × 12).
Related Calculators
- Bi-Weekly Mortgage Calculator
- Mortgage Refinance Calculator
- Interest-Only Mortgage Calculator
- Mortgage Affordability Calculator
What Is Mortgage Calculator Code for Website?
Embedding a mortgage calculator on your site keeps visitors engaged and improves SEO dwell time. This lightweight, responsive snippet calculates monthly principal & interest instantly without external dependencies.
Simply copy the entire block into any WordPress page, post, or widget area—no plugins, no iFrames, no API keys.
How to Add Mortgage Calculator Code (Example)
- Copy the HTML <style> and <script> blocks above.
- In WordPress, open the page/post where you want the calculator.
- Paste into a Custom HTML or Code block.
- Publish—calculator is live and mobile-friendly.