caldridge

Embed Caldridge calculators
on any site — free, privacy-first.

Copy-paste a single iframe snippet to add a working financial calculator — mortgage, business loan, SBA, global cash flow, FCCR, or bond yield & spread — to any blog, course site, lender comparison page, or training program. We don't track your visitors, your visitors don't get retargeted, and the only outbound link is a small "Powered by Caldridge" credit you can leave or remove. Used by finance instructors, credit-analyst training programs, and personal-finance blogs.

1. Mortgage calculator (PITI + PMI + amortization)

This is the same calculator that powers caldridge.org/mortgage-calculator, stripped to a clean two-column layout that drops cleanly into any 600-1000px content column.

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How it works

      
    
        
  • One iframe, auto-resizing. The embed posts a caldridge-embed-height message via postMessage when its content changes. The included snippet listens for that message and resizes the iframe so there's no inner scrollbar.
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  • No tracking of your visitors. The embed loads no third-party trackers, no ads, no analytics pixels. Inputs run in the visitor's browser.
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  • Theme-aware. Defaults to the visitor's prefers-color-scheme. Force ?theme=light or ?theme=dark to lock it.
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  • Attribution. A small "Calculator by Caldridge" footer link is included. We ask that you keep it — it's how the calculator stays free. Removing it is not blocked but appreciated would be a credit.
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Terms of use

      
The embed is free for any non-commercial or commercial site. Don't strip the attribution link, don't reverse-proxy the embed (use the iframe), and don't claim authorship of the underlying math. We may update the calculator at any time; the iframe will pick up updates automatically.


      
Coming soon

      
Auto-loan, personal-loan, business-loan, SBA, and DSCR embeds will land next. Email [email protected] if you want one prioritized for a specific use case.