Three free, self-contained calculator widgets you can drop into your own site with a single <iframe>. No signup, no API key, no tracking, and no dependency on your site's cookies or local storage. Each keeps a small "Powered by fincalcyou.com" credit link — please leave it in place.
Monthly payment, principal vs. interest split, for a fixed-rate loan.
<iframe src="https://fincalcyou.com/embed/mortgage.html" width="100%" height="430" style="border:0" loading="lazy" title="Mortgage calculator"></iframe>Future value of a starting amount plus monthly contributions.
<iframe src="https://fincalcyou.com/embed/compound-interest.html" width="100%" height="440" style="border:0" loading="lazy" title="Compound interest calculator"></iframe>Maturity value of a fixed monthly investment (systematic investment plan).
<iframe src="https://fincalcyou.com/embed/sip.html" width="100%" height="430" style="border:0" loading="lazy" title="SIP calculator"></iframe>Each widget is a plain HTML page with all CSS and JavaScript inline — nothing loads from anywhere else, and it stores nothing in cookies or localStorage, so it works the same in any iframe on any site. Numbers default to a sample loan/investment; visitors can type their own. These are the same reducing-balance / compound-interest / SIP formulas used across fincalcyou.com's full calculators — see our methodology for how they're derived, and our financial disclaimer for what these estimates do and don't mean.
Prefer a widget that renders inline without an iframe (car loan, investment, fixed deposit too)? See our copy-paste script embed instead.