PE-Calc

Embed PE-Calc Calculators on Your Site

Free interactive engineering calculators for course pages, technical blogs, contractor reference sites, and engineering wikis. Single iframe tag, attribution required, no API key, no sign-up.

Why embed?

If you maintain a fluid mechanics course page, a stormwater reference blog, a contractor's pump-sizing post, or any other engineering resource, a static formula is a dead end. An interactive calculator lets your readers solve their actual problem on your page. PE-Calc embeds give you a working calculator in one line of HTML, no JavaScript build, no dependencies you need to maintain.

How it works

Pick a calculator below.
Copy the <iframe> tag.
Paste into your HTML, Markdown (most renderers allow inline iframes), or CMS block.

Each embed is a standalone page (no shared header, no ads) sized for typical content widths. Default height is 480 px; tall calculators (culvert) need 600 px. Adjust height as needed for your layout.

License and attribution

Embedding is free for any non-spam use — academic course pages, engineering blogs, technical writing, internal company wikis, contractor reference sites. The embed includes a small "via PE-Calc" attribution link at the bottom that must remain visible. That's the only requirement. No payment, no sign-up, no API key.

Available calculators

Manning's Equation — Open-Channel Flow

Discharge from Manning's roughness, area, hydraulic radius, and slope. Imperial + SI.

<iframe src="https://pe-calc.com/embed/mannings.html"
        width="100%" height="480" frameborder="0" loading="lazy"></iframe>

Click the snippet to select all, then Cmd/Ctrl+C.

Hazen-Williams Equation — Pipe Flow

Friction head loss, velocity, and hydraulic gradient for water-distribution pipe.

<iframe src="https://pe-calc.com/embed/hazen-williams.html"
        width="100%" height="480" frameborder="0" loading="lazy"></iframe>

Click the snippet to select all, then Cmd/Ctrl+C.

Orifice Flow — Torricelli + Discharge Coefficient

Q = C_d·A·√(2gH). Sharp-edged, rounded, rectangular, and submerged orifice options.

<iframe src="https://pe-calc.com/embed/orifice.html"
        width="100%" height="500" frameborder="0" loading="lazy"></iframe>

Click the snippet to select all, then Cmd/Ctrl+C.

Sharp-Crested Rectangular Weir

Francis equation for rectangular sharp-crested weirs. Suppressed and contracted options.

<iframe src="https://pe-calc.com/embed/sharp-crested-weir.html"
        width="100%" height="440" frameborder="0" loading="lazy"></iframe>

Click the snippet to select all, then Cmd/Ctrl+C.

Culvert Hydraulics — FHWA HDS-5

Inlet + outlet control headwater for circular culverts. Concrete and CMP, six entrance types.

<iframe src="https://pe-calc.com/embed/culvert.html"
        width="100%" height="600" frameborder="0" loading="lazy"></iframe>

Click the snippet to select all, then Cmd/Ctrl+C.

Privacy

Embed pages run entirely in the visitor's browser. Inputs and computed results never leave the visitor's machine. Embed pages do not load Google AdSense; they only load KaTeX from jsDelivr CDN for formula rendering.

Need a calculator that's not listed?

The above five are the cornerstones — the most-requested embeds. The remaining 44 PE-Calc tools can be made embeddable on request. Email a request with the calculator name and your use case.

Custom or white-label embeds?

Need an embed without the PE-Calc attribution, with your own colors, or computing custom formulas? HydroComplete offers white-label calculator delivery. Reach out via email.