Calculator widgets
Add a working calculator to your website. Free, no account required.
Live preview
Choose measurement units inside the calculator.
Try a calculation here. The preview uses the same iframe as the code below.
Embed code
Fits the content automatically. Requires JavaScript on your page.
Changing method reloads the preview and clears its calculation.
Paste the code into a Custom HTML block on your site. Publish the page, then check the calculation and both footer links.
Installation help
Your editor must allow iframe embeds. If blocked, ask your site administrator to allow pro2.tools.
Use an HTML or custom-code block in WordPress, Tilda, Wix or Webflow. Permissions depend on the editor and plan. If scripts are removed, choose the fixed iframe. Adjust appearance above and test the published page on mobile.
If your CMS places this code inside another fixed-height frame, adjust that outer block in the editor too. This script resizes only the Pro² iframe.
Free, no account required. Keep the Pro² footer visible. Do not present results as certification or engineering approval. Check inputs and local requirements.
Need a different calculator?
Tell us what your site needs to calculate. Your idea can help shape the next free widget.