Embeddable Widgets

Free HVAC and Electrical Widgets for Your Website

Put an HVAC or electrical calculator that cites its source on your own site with a short copy-and-paste snippet. No login, no API key, no plugin. It always runs the currently deployed Intry engine and source set, and works on any site.

How It Works

Find the calculator you want below and press Copy embed code.
Paste it into any page, post, or CMS (WordPress, Squarespace, Webflow, Wix, or raw HTML).
Keep the credit line under it so readers know where it comes from. It tracks the deployed engine on its own.

Pick a Calculator or Chart to Embed

Conduit Bending Calculator

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Superheat & Subcooling Calculator

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Voltage Drop Calculator

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Wire Size Calculator

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EV Charger Calculator

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Box Fill Calculator

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Conduit Fill Calculator

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BTU Load Calculator

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Conductor Capacity Check (NEC 310.16)

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Conduit Fill Chart (EMT, 40%)

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Box Picker (NEC 314.16)

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EGC Sizer with the 250.122(B) upsize

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Next Standard Size with the 240.4(B) conditions

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Ampacity Derating Calculator (NEC 310.15)

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BTU per Square Foot Chart

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A2L Refrigerant Properties

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R-454B vs R-410A Chart

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R-32 vs R-410A Chart

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R-32 vs R-454B Chart

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NEC 2023 vs 2026 Load Calc Chart

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Copper vs Aluminum Wire Chart

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THHN vs THWN Chart

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Conduit Types Fill Chart

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Motor Circuit Calculator (FLC, Wire & Breaker)

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Breaker Size by Load Chart (NEC)

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Embed Codes

Conduit Bending Calculator

Where these numbers come from

<!-- Conduit Bending Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/conduit-bending" title="Conduit Bending Calculator by Intry" width="100%" height="780" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/conduit-bending-calculator" target="_blank" rel="noopener">Conduit Bending Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Superheat & Subcooling Calculator

Where these numbers come from

<!-- Superheat & Subcooling Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/superheat" title="Superheat & Subcooling Calculator by Intry" width="100%" height="840" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/hvac/superheat-subcooling-calculator" target="_blank" rel="noopener">Superheat & Subcooling Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Voltage Drop Calculator

Where these numbers come from

<!-- Voltage Drop Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/voltage-drop" title="Voltage Drop Calculator by Intry" width="100%" height="780" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/voltage-drop-calculator" target="_blank" rel="noopener">Voltage Drop Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Wire Size Calculator

Where these numbers come from

<!-- Wire Size Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/wire-size" title="Wire Size Calculator by Intry" width="100%" height="780" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/wire-size-calculator" target="_blank" rel="noopener">Wire Size Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

EV Charger Calculator

Where these numbers come from

<!-- EV Charger Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/ev-charger" title="EV Charger Calculator by Intry" width="100%" height="780" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/ev-charger-calculator" target="_blank" rel="noopener">EV Charger Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Box Fill Calculator

Where these numbers come from

<!-- Box Fill Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/box-fill" title="Box Fill Calculator by Intry" width="100%" height="780" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/box-fill-calculator" target="_blank" rel="noopener">Box Fill Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Conduit Fill Calculator

Where these numbers come from

<!-- Conduit Fill Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/conduit-fill" title="Conduit Fill Calculator by Intry" width="100%" height="780" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/conduit-fill-calculator" target="_blank" rel="noopener">Conduit Fill Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

BTU Load Calculator

Where these numbers come from

<!-- BTU Load Calculator by Intry -->
<iframe src="https://www.intrysys.com/embed/btu" title="BTU Load Calculator by Intry" width="100%" height="780" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/hvac/btu-calculator" target="_blank" rel="noopener">BTU Load Calculator</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Conductor Capacity Check (NEC 310.16)

Where these numbers come from

<!-- Conductor Capacity Check (NEC 310.16) by Intry -->
<iframe src="https://www.intrysys.com/embed/ampacity-chart" title="Conductor Capacity Check (NEC 310.16) by Intry" width="100%" height="1560" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/wire-ampacity-chart" target="_blank" rel="noopener">Conductor Capacity Check (NEC 310.16)</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Conduit Fill Chart (EMT, 40%)

Where these numbers come from

<!-- Conduit Fill Chart (EMT, 40%) by Intry -->
<iframe src="https://www.intrysys.com/embed/conduit-fill-chart" title="Conduit Fill Chart (EMT, 40%) by Intry" width="100%" height="620" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/conduit-fill-chart" target="_blank" rel="noopener">Conduit Fill Chart (EMT, 40%)</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Box Picker (NEC 314.16)

Where these numbers come from

<!-- Box Picker (NEC 314.16) by Intry -->
<iframe src="https://www.intrysys.com/embed/box-fill-chart" title="Box Picker (NEC 314.16) by Intry" width="100%" height="900" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/box-fill-volume-chart" target="_blank" rel="noopener">Box Picker (NEC 314.16)</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

EGC Sizer with the 250.122(B) upsize

Where these numbers come from

<!-- EGC Sizer with the 250.122(B) upsize by Intry -->
<iframe src="https://www.intrysys.com/embed/ground-wire-chart" title="EGC Sizer with the 250.122(B) upsize by Intry" width="100%" height="900" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/ground-wire-size-chart" target="_blank" rel="noopener">EGC Sizer with the 250.122(B) upsize</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Next Standard Size with the 240.4(B) conditions

Where these numbers come from

<!-- Next Standard Size with the 240.4(B) conditions by Intry -->
<iframe src="https://www.intrysys.com/embed/breaker-sizes-chart" title="Next Standard Size with the 240.4(B) conditions by Intry" width="100%" height="900" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/standard-breaker-sizes" target="_blank" rel="noopener">Next Standard Size with the 240.4(B) conditions</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Ampacity Derating Calculator (NEC 310.15)

Where these numbers come from

<!-- Ampacity Derating Calculator (NEC 310.15) by Intry -->
<iframe src="https://www.intrysys.com/embed/derating-chart" title="Ampacity Derating Calculator (NEC 310.15) by Intry" width="100%" height="720" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/ampacity-derating-factors" target="_blank" rel="noopener">Ampacity Derating Calculator (NEC 310.15)</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

BTU per Square Foot Chart

<!-- BTU per Square Foot Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/btu-sqft-chart" title="BTU per Square Foot Chart by Intry" width="100%" height="560" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/hvac/btu-per-square-foot-chart" target="_blank" rel="noopener">BTU per Square Foot Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

A2L Refrigerant Properties

Where these numbers come from

<!-- A2L Refrigerant Properties by Intry -->
<iframe src="https://www.intrysys.com/embed/a2l-chart" title="A2L Refrigerant Properties by Intry" width="100%" height="640" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/hvac/a2l-refrigerant-properties" target="_blank" rel="noopener">A2L Refrigerant Properties</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

R-454B vs R-410A Chart

Where these numbers come from

<!-- R-454B vs R-410A Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/r-454b-vs-r-410a" title="R-454B vs R-410A Chart by Intry" width="100%" height="560" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/hvac/r-454b-vs-r-410a" target="_blank" rel="noopener">R-454B vs R-410A Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

R-32 vs R-410A Chart

Where these numbers come from

<!-- R-32 vs R-410A Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/r-32-vs-r-410a" title="R-32 vs R-410A Chart by Intry" width="100%" height="620" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/hvac/r-32-vs-r-410a" target="_blank" rel="noopener">R-32 vs R-410A Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

R-32 vs R-454B Chart

Where these numbers come from

<!-- R-32 vs R-454B Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/r-32-vs-r-454b" title="R-32 vs R-454B Chart by Intry" width="100%" height="600" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/hvac/r-32-vs-r-454b" target="_blank" rel="noopener">R-32 vs R-454B Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

NEC 2023 vs 2026 Load Calc Chart

Where these numbers come from

<!-- NEC 2023 vs 2026 Load Calc Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/nec-2023-vs-2026" title="NEC 2023 vs 2026 Load Calc Chart by Intry" width="100%" height="560" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/nec-2023-vs-2026-load-calculation" target="_blank" rel="noopener">NEC 2023 vs 2026 Load Calc Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Copper vs Aluminum Wire Chart

Where these numbers come from

<!-- Copper vs Aluminum Wire Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/copper-vs-aluminum" title="Copper vs Aluminum Wire Chart by Intry" width="100%" height="540" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/copper-vs-aluminum-wire" target="_blank" rel="noopener">Copper vs Aluminum Wire Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

THHN vs THWN Chart

Where these numbers come from

<!-- THHN vs THWN Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/thhn-vs-thwn" title="THHN vs THWN Chart by Intry" width="100%" height="540" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/thhn-vs-thwn" target="_blank" rel="noopener">THHN vs THWN Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Conduit Types Fill Chart

Where these numbers come from

<!-- Conduit Types Fill Chart by Intry -->
<iframe src="https://www.intrysys.com/embed/conduit-types" title="Conduit Types Fill Chart by Intry" width="100%" height="620" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/conduit-types" target="_blank" rel="noopener">Conduit Types Fill Chart</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Motor Circuit Calculator (FLC, Wire & Breaker)

Where these numbers come from

<!-- Motor Circuit Calculator (FLC, Wire & Breaker) by Intry -->
<iframe src="https://www.intrysys.com/embed/motor-flc-chart" title="Motor Circuit Calculator (FLC, Wire & Breaker) by Intry" width="100%" height="720" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/motor-full-load-current-chart" target="_blank" rel="noopener">Motor Circuit Calculator (FLC, Wire & Breaker)</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Breaker Size by Load Chart (NEC)

Where these numbers come from

<!-- Breaker Size by Load Chart (NEC) by Intry -->
<iframe src="https://www.intrysys.com/embed/breaker-by-load-chart" title="Breaker Size by Load Chart (NEC) by Intry" width="100%" height="760" loading="lazy" allow="clipboard-write" style="border:1px solid #e6e4e0;border-radius:12px;max-width:520px;width:100%"></iframe>
<p style="font:13px/1.5 system-ui,-apple-system,sans-serif;margin:8px 0 0;color:#57534e"><a href="https://www.intrysys.com/tools/electrical/what-size-breaker-do-i-need" target="_blank" rel="noopener">Breaker Size by Load Chart (NEC)</a> by <a href="https://www.intrysys.com" target="_blank" rel="noopener">Intry</a></p>

Why Embed an Intry Calculator

No login, no paywall

No account, no API key, no usage cap. Keep the small credit line and it is yours.

Always current

Computed from its cited, published source, and it updates itself.

Works anywhere

A standard iframe that never fights your site’s styling. WordPress, Squarespace, Webflow, Wix, or raw HTML.

Frequently Asked Questions

How do I add a calculator to my website?

Find the calculator you want on this page, press Copy embed code, and paste the snippet into any page, post, or CMS (WordPress, Squarespace, Webflow, Wix, or raw HTML) where you want the calculator to appear. It loads in an iframe, so it never conflicts with your site's styles, and it always runs the currently deployed Intry engine and source set.

What does it cost?

Nothing. Every calculator embed is yours at no cost, with no login, no API key, and no usage limit. Keep the small credit line under the calculator, which names the tool and Intry, and you are good to go.

Does it work on WordPress, Squarespace, and Wix?

Yes. The snippet is a standard iframe plus a credit line, so it works anywhere you can paste HTML: a WordPress Custom HTML block, a Squarespace code block, a Webflow embed, a Wix HTML iframe, or a plain web page. No plugin required.

Will the calculator slow down my page?

No. Each calculator is a small, self-contained widget that loads on its own with lazy loading, so it does not hold up the rest of your page. There is nothing to install and no external script to maintain.

Are the calculations accurate and up to date?

Yes. Every result is computed from its cited, published source, and the embedded version always shows the current version, so you never have to update anything. Each calculator cites the source it uses.