Eight small tools you can put on your own page with one line of HTML. They are ad-free, load nothing from third parties, and do every calculation in the visitor's browser. Pick a widget, set the size and theme, then copy the code.
Width: a pixel number (such as 400) or a percentage (such as 100%).
Free to use, including commercially. Please leave the built-in credit link in place. Figures are estimates and checks, not tax, legal or lending advice; each widget states its source. The SIN widget confirms format and checksum only, not that a number was issued. Rates as of 2026-10-01.
Yes. The widgets are free for personal and commercial sites. Keep the "Powered by tools.tnaado.ca" link that is built into each widget.
No. Embed pages load no ad scripts, no analytics and no third-party requests. Calculations run in the visitor's browser and nothing they type is sent anywhere.
A link inside an iframe belongs to the framed page, not to the page that hosts it. That is why the generator also offers an optional plain-text credit line for your own page, which is a normal link on your site.
Add ?theme=light, ?theme=dark or ?theme=auto (follows the visitor's system setting) to the iframe address. The generator below does this for you.
Each widget has a suggested height in the generator. Narrow screens wrap the fields onto more lines, so leave a little extra height or let the iframe scroll.
Yes. Each widget states its source and as-of date under the form: CRA rates for GST/HST, the federal Interest Act for mortgage compounding, NIST SP 811 for unit factors and Service Canada for SIN structure. They are estimates and checks, not tax, legal or lending advice.
Cite this page: TNAADO Tools, “Free embeddable calculators and checkers,” https://tools.tnaado.ca/embed/, last reviewed 2026-10-01.