Free Embeddable Photography Calculator Widgets
Add working photography calculators to your blog, tutorial, or gear review — free, no sign-up, no watermark. Pick a widget, copy the embed code, done.
Widgets
Embed any widget
Each widget is one self-contained HTML file. Paste this on WordPress, Wix, Blogger, Squarespace, or any site that allows iframes:
<iframe src="https://shuttermath.com/embed/WIDGET.html" width="100%" height="480" style="border:1px solid #ddd;border-radius:10px" title="ShutterMath calculator" loading="lazy"></iframe>
Replace WIDGET.html with nd-filter-widget.html, star-trails-widget.html, dof-widget.html, or pixel-scale-widget.html.
Why use them? Your readers get genuinely useful, accurate tools — no registration wall. They stay current automatically, and a small "Calculated with ShutterMath" credit keeps the source transparent.
What you can calculate
- ND filter shutter times — ND2 to ND100000, exact to the fraction of a stop.
- Exposure compensation — account for a half-stop between filter strengths.
- Readable long-exposure times — shown as seconds, minutes, or minutes+seconds.
Looking for more? The full ND filter calculator includes a printable stops chart and the long-exposure reference table.