Can a company put these calculators on its website for free?

Yes. They are free on any website, commercial ones included, with no sign-up and no key. The only thing asked is to keep the link to SyntaxFlow under the calculator visible.

Does the calculator send my visitors' figures anywhere?

No. The calculation runs in the visitor's browser. SyntaxFlow only counts that the calculator was shown and on which website, by its host name, without cookies; neither Google Analytics nor Clarity runs inside the frame.

Which calculators can I embed?

9: Glass weight calculator, Glass thickness calculator for wind load, U-value calculator for insulating glass, Wind pressure calculator for glazing, Metal weight calculator, Sheet weight calculator, Square footage calculator, Roof pitch calculator, Window U-value calculator.

For your website

Calculators for your website: glass, windows and steel

If you make or sell glass, windows or steel, the people who visit your website can work out what a pane weighs, how thick it has to be for the wind, the U-value of an insulating unit or of a whole window, or the weight of a bar or a tube, on your own pages. You paste a short code; the calculator is free, shows its working and runs in your visitor's browser.

Which calculator for which business

Your business	Calculators that fit
Glass manufacturers, processors and merchants	Glass weight calculator Glass thickness calculator for wind load U-value calculator for insulating glass Wind pressure calculator for glazing
Window and door manufacturers and installers	Window U-value calculator U-value calculator for insulating glass Glass thickness calculator for wind load Wind pressure calculator for glazing
Steel and metal merchants, metalworkers	Metal weight calculator

Also available: Sheet weight calculator, Square footage calculator, Roof pitch calculator. Each one exists in English and Spanish, and in German, French, Portuguese or Italian where that version exists: the embed page has the code of every calculator in each of its 6 languages.

Three of them, working

This is exactly what your visitors would see: try them here, then copy the code under each one.

Glass weight calculator

Weight of a pane, a laminated make-up or a double or triple glazed unit, in kg or lb, with the handling guideline. See the full calculator

Code to paste into your page

<iframe src="https://syntaxflow.io/embed/glass/weight/" title="Glass weight calculator · SyntaxFlow" height="930" style="width:100%;border:0" loading="lazy" referrerpolicy="strict-origin-when-cross-origin" data-sf-embed></iframe>
<p style="margin:6px 0 0;font-size:13px">Glass weight calculator by <a href="https://syntaxflow.io/glass/weight/">SyntaxFlow</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://syntaxflow.io"||!e.data||e.data.type!=="sf-embed-height")return;var f=document.querySelectorAll("iframe[data-sf-embed]");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source){var h=Math.round(e.data.height);if(h>199&&h<6001)f[i].style.height=h+"px"}});</script>

U-value calculator for insulating glass

Ug of a double or triple insulating glass unit to EN 673: air, argon, krypton or xenon, with or without low-E. See the full calculator

Code to paste into your page

<iframe src="https://syntaxflow.io/embed/glass/u-value/" title="U-value calculator for insulating glass · SyntaxFlow" height="1240" style="width:100%;border:0" loading="lazy" referrerpolicy="strict-origin-when-cross-origin" data-sf-embed></iframe>
<p style="margin:6px 0 0;font-size:13px">U-value calculator for insulating glass by <a href="https://syntaxflow.io/glass/u-value/">SyntaxFlow</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://syntaxflow.io"||!e.data||e.data.type!=="sf-embed-height")return;var f=document.querySelectorAll("iframe[data-sf-embed]");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source){var h=Math.round(e.data.height);if(h>199&&h<6001)f[i].style.height=h+"px"}});</script>

Metal weight calculator

Weight of bars, tubes, sheet and sections in steel, stainless and aluminium, per metre and per piece. See the full calculator

Code to paste into your page

<iframe src="https://syntaxflow.io/embed/metal/weight/" title="Metal weight calculator · SyntaxFlow" height="1100" style="width:100%;border:0" loading="lazy" referrerpolicy="strict-origin-when-cross-origin" data-sf-embed></iframe>
<p style="margin:6px 0 0;font-size:13px">Metal weight calculator by <a href="https://syntaxflow.io/metal/weight/">SyntaxFlow</a></p>
<script>addEventListener("message",function(e){if(e.origin!=="https://syntaxflow.io"||!e.data||e.data.type!=="sf-embed-height")return;var f=document.querySelectorAll("iframe[data-sf-embed]");for(var i=0;i<f.length;i++)if(f[i].contentWindow===e.source){var h=Math.round(e.data.height);if(h>199&&h<6001)f[i].style.height=h+"px"}});</script>

How to put one on your page

Copy the code of the calculator you want, in the language your visitors read.
Paste it into your page: in WordPress, a Custom HTML block; in other site builders, an HTML or embed block.
That is all: the short script in the code lets the calculator take the height it needs. No sign-up and no key.

What does not leave your visitor's browser

What they type. The calculation runs in their browser and nothing they enter is sent to SyntaxFlow or to anybody else.
Cookies. The calculator sets none, and neither Google Analytics nor Clarity runs inside the frame.
The address of your page. SyntaxFlow counts that the calculator was shown and on which website, by its host name only; the code asks the browser to send no more than your site's origin (referrerpolicy="strict-origin-when-cross-origin").

Conditions, in short

Free, on any website, commercial ones included.
Keep the link. The line under the frame and the one inside it stay visible: that is all that is asked in return.
No warranty. A result is a pre-dimensioning estimate, not a signed calculation, on your page as on this site.
Always the current version. If a calculator is corrected or improved, your page shows the change.

The full conditions are on the embed page.

Questions people ask

Can a company put these calculators on its website for free?: Yes. They are free on any website, commercial ones included, with no sign-up and no key. The only thing asked is to keep the link to SyntaxFlow under the calculator visible.
Does the calculator send my visitors' figures anywhere?: No. The calculation runs in the visitor's browser. SyntaxFlow only counts that the calculator was shown and on which website, by its host name, without cookies; neither Google Analytics nor Clarity runs inside the frame.
Which calculators can I embed?: 9: Glass weight calculator, Glass thickness calculator for wind load, U-value calculator for insulating glass, Wind pressure calculator for glazing, Metal weight calculator, Sheet weight calculator, Square footage calculator, Roof pitch calculator, Window U-value calculator.