For site owners
Embed a free electrical calculator
Every calculator on this site can be dropped into your own page with one iframe. It stays free, needs no account and shows no advertising. The embed shows the same working as the full page: the substituted formula and the code reference behind every step.
What it looks like
This is the live embed, not a screenshot. Resize your window and it reflows with you.
The snippet
Paste this anywhere HTML is allowed. The height is a starting point — the widget scrolls if you make it shorter.
<iframe src="https://eleccalcs.com/embed/conduit-fill" width="100%" height="760" style="border:1px solid #d4d4d8;border-radius:12px" title="Electrical calculator by ElecCalcs" loading="lazy" ></iframe> <p style="font:12px/1.5 system-ui,sans-serif;text-align:center"> <a href="https://eleccalcs.com/embed">Free electrical calculator</a> by ElecCalcs </p>
Available calculators
| Calculator | Embed URL | Suggested height |
|---|---|---|
| Conduit Fill | /embed/conduit-fill | 760 px |
| Voltage Drop | /embed/voltage-drop | 700 px |
| Ampacity | /embed/ampacity | 820 px |
| Wire Size | /embed/wire-size | 760 px |
| Box Fill | /embed/box-fill | 820 px |
| Breaker Size | /embed/breaker-size | 640 px |
| Recessed Lighting | /embed/recessed-lighting | 760 px |
Terms, in plain language
- Free to embed, including on commercial sites. No signup and no request needed.
- Keep the credit link under the widget. It is the only thing we ask for, and it is what keeps the calculators free.
- Do not present the widget as your own calculator, and do not resell it.
- The results are educational design aids, not professional engineering advice — see the methodology page and the terms.
Want a calculator that is not listed here, or a version that matches your own site and needs? Use the about page to get in touch.