Put any Numexa calculator on your site with one copy-paste snippet.
Free, fast, responsive, and always up to date — the tool runs from our
servers, so you never maintain anything.
Theme
Auto follows each visitor's own light/dark preference.
Your snippet
Free to use — please keep the attribution link under the widget.
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Why embed a Numexa calculator?
Zero maintenance. Formulas, fixes and improvements ship from our side automatically.
Fact-checked math. Every formula is unit-tested against its published source — 249 automated tests behind the scenes.
Fast and private. Lightweight static pages; no accounts, no tracking scripts inside the widget, visitor inputs never leave their device.
Fits your site. Responsive width, and a light, dark, or auto theme to match your design.