Free website calculator widget
A free calculator widget for your website is a self-contained tool: all 21 calculators and 4 unit converters here embed with one HTML iframe line. There is no key, account, or signup. Visitors pick the calculator, units, and starting size, see a live preview, and copy the code. The frame footer's credit line links back to the calculator page, and keeping it visible is the only condition.
Preview
Embed code
Paste this HTML code into any page editor that accepts HTML.
<iframe src="https://diytotals.com/embed/square-footage-calculator?l=16&w=12" style="border:0;width:100%;height:640px" loading="lazy" title="Square Footage Calculator from DIY Totals"></iframe>
A credit line appears in the widget footer and points to the calculator's page on our site. Keeping that link visible is the one condition of use.
Results are estimates. The widget is free for any site, and our terms of use cover the embed.
Is the calculator widget free?
Yes. It needs no account and no API key. The widget is free to embed on any site.
Can the size and units be changed after embedding?
Yes. Visitors can switch between feet and metres in the frame and adjust the drawing's measurements. Your chosen preset only sets the opening view.
Will the widget work in WordPress or Shopify?
Yes. Any page editor that accepts HTML can display this widget, including WordPress, Shopify, Squarespace and Wix. The footer carries a credit line linking to the calculator's page; please leave it visible.