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WP-Math-2 can help you insert math formula into WordPress posts or comments. You can use <code>$$...$$</code>(block, only one math expression per line) and <code>$...$</code>(inline, around the text) to insert math. This plugin will render them to HTML or MathML code snippets(Depends on your browser. If your browser supports MathML, it will use MathML, otherwise, use HTML and CSS instead). This work is done by javascript. So your browser must enable JavaScript.
But in most of RSS readers, any JavaScript snippets cannot execute. So I made a trick. WP-Math-2 will convert LaTeX text to images. So users can see math contents with their favorite RSS reader software.

WP-Math-2

WP-Math-2 is a plugin that can convert LaTeX math formula to HTML of images, so that the formula could be shown in browser.

CodeIsArt.NET

CodeArt Units Converter is a fast, flexible, and lightweight plugin that lets you embed interactive unit converters, a basic calculator, and a scientific calculator into any post, page, or widget using simple shortcodes. Perfect for education websites, blogs, engineering platforms, health tools, or any site where users need quick, reliable conversions and calculations without leaving the page.
Unlike many plugins that rely on external APIs, CodeArt Units Converter works 100% locally, ensuring faster load times and full privacy. Its responsive layout works smoothly on desktops, tablets, and mobile devices.
<a href="https://wordpress-units-converter-plugin.codeisart.net/" rel="nofollow ugc">Plugin & API Documentation</a>
<h3>Key Features</h3>
<ul>
<li>✅ Weight units converter (kg, lb, g, oz, and more)</li>
<li>✅ Speed units converter (km/h, m/s, mph, knots)</li>
<li>✅ Area units converter (m², ft², acres, hectares, etc.)</li>
<li>✅ Volume units converter (liters, gallons, cubic meters, etc.)</li>
<li>✅ Length units converter (meters, feet, inches, miles, etc.)</li>
<li>✅ Temperature converter (Celsius, Fahrenheit, Kelvin)</li>
<li>✅ Time converter (seconds, minutes, hours, days, etc.)</li>
<li>✅ Digital Storage converter (KB, MB, GB, TB, etc.)</li>
<li>✅ Energy converter (Joules, Calories, kWh, etc.)</li>
<li>✅ Power converter (Watts, Kilowatts, Horsepower, etc.)</li>
<li>✅ Pressure converter (Pa, bar, PSI, atm, etc.)</li>
<li>✅ Force converter (Newtons, dynes, pound-force, etc.)</li>
<li>✅ Angle converter (degrees, radians, grads)</li>
<li>✅ Frequency converter (Hz, kHz, MHz, etc.)</li>
<li>✅ Fuel Economy converter (mpg, L/100km, etc.)</li>
<li>✅ Density converter (kg/m³, g/cm³, lb/ft³, etc.)</li>
<li>🧮 Basic Calculator – For everyday arithmetic</li>
<li>🧪 Scientific Calculator – Advanced functions like powers, roots, trigonometry, logs, π, and e</li>
<li>🌐 Fully responsive design</li>
<li>⚙️ Simple shortcode integration</li>
<li>🚀 Fast, AJAX-powered performance</li>
</ul>
🛠️ Shortcode Manager (Add/Edit/Delete Shortcodes from WP Admin) 
A powerful Shortcode Manager has been introduced in the WordPress admin area. 
With this new feature, you can: 
Add custom shortcodes for any converter type 
Edit existing shortcodes to fine-tune their settings 
Delete unused shortcodes easily
🚀 New features 
Each generated shortcode is now fully customizable — you can select exactly which units to include in the converter. This means you can now create highly specific converters (e.g., only inches ↔ centimeters, or only kilograms ↔ pounds) right from the Shortcode Manager page. 
This gives you the flexibility to: 
Create multiple custom converters tailored to different content types 
Display only relevant units for your audience 
Avoid overwhelming users with unnecessary unit choices 
🧩 In short: You can now generate unlimited custom unit converters directly from your admin panel — no coding needed.
<h3>Example Shortcodes</h3>
Use the <code>type</code> attribute to specify the converter or calculator. You can also use the <code>style</code> attribute to customize layout (e.g., <code>table</code>, <code>list</code>).
<ul>
<li><code>[codeart_units_converter_converters type='weight' style='table']</code></li>
<li><code>[codeart_units_converter_converters type='speed' style='table']</code></li>
<li><code>[codeart_units_converter_converters type='area' style='table']</code></li>
<li><code>[codeart_units_converter_converters type='volume' style='table']</code></li>
<li><code>[codeart_units_converter_converters type='length' style='table']</code></li>
<li>and more…</li>
</ul>
<h3>Need Help?</h3>
If you have feature requests, need help, or have found a bug, let us know in the support forum or contact us at <a href="https://support.codeisart.net" rel="nofollow ugc">https://support.codeisart.net</a>.
Also, check the full <a href="https://wordpress-units-converter-plugin.codeisart.net" rel="nofollow ugc">documentation</a> for setup instructions and feature guides.

CodeArt Units Converter

Easily add unit converters and calculators (basic & scientific) to your WordPress site using shortcodes.

WP-Math-2 vs CodeArt Units Converter