Petr Novak

Smart Convert – Currency & Unit Conversion is not just another calculator, it is a complete conversion infrastructure for WordPress sites. Designed for performance and flexibility, it handles everything from simple currency exchanges to complex, non-linear physical unit conversions (like Temperature).
Whether you run a travel blog, or a technical documentation hub, this plugin ensures your visitors see accurate conversions in a format that fits your design.
🚀 My Ambition: Premium Features for Free With this initial release, my goal is to set a new standard for what a free plugin can offer. I believe advanced tools shouldn’t be locked behind a paywall. That is why Smart Convert includes enterprise-grade features usually found only in paid versions: a Custom Unit Builder, a Template Engine, Import/Export capabilities, and Automatic Geolocation—all completely free.
<h3>🌟 Key Features</h3>
💰 Advanced Currency Engine 
* Rates: Supports 153 global currencies + cryptocurrencies (BTC, ETH, etc.). 
* Smart Geo-Location: Automatically detects visitor IP to display their local currency (powered by ipinfo.io). 
* “Spread” & Fees: Add a percentage markup (e.g., 2%) to exchange rates to simulate bank fees or retail pricing. 
* Smart Rounding: Intelligently adjusts decimals (e.g., 0 decimals for JPY, 6 decimals for BTC).
📏 Comprehensive Unit Converter 
* 105+ Built-in Units: Covers 14 categories including Length, Mass, Volume, Temperature, Pressure, Energy, Speed, and Data. 
* Bi-Directional Custom Units: Creating a unit like “Box” (e.g., 1 Box = 12 Items). The plugin automatically generates the reverse conversion logic for you. 
* Complex Math: Handles non-linear conversions (like Fahrenheit to Celsius) with precision offset calculations.
🎨 Visual & Editor Integration 
* Native Gutenberg Block: Visually configure conversions (Amount, From, To, Decimals) with a live backend preview. 
* Inline Toolbar Tool: Select any text in your post and convert it instantly using the rich text toolbar button. 
* Interactive Tooltips: Solves the common “overflow:hidden” clipping issue using a smart portal strategy to display rates on hover. 
* Template System: Design your output using placeholders like <code>{FROM}</code>, <code>{TO}</code>, <code>{RATE}</code>, and <code>{DATE}</code>.
⚙️ Performance & Workflow 
* Zero Database Bloat: Uses robust Object Caching and Transients. 
* Import/Export: Transfer your custom templates and custom units between sites via JSON. 
* Privacy First: External connections are disabled by default until explicit consent is given via the Onboarding Wizard.
<h3>🌍 Internationalization & Translations</h3>
Smart Convert – Currency & Unit Conversion is fully localized and ready for global audiences. The plugin is translated into the following languages:
<ul>
<li>English</li>
<li>Spanish (Español)</li>
<li>Japanese (日本語)</li>
<li>German (Deutsch)</li>
<li>French (Français)</li>
<li>Russian (Русский)</li>
<li>Brazilian Portuguese (Português do Brasil)</li>
<li>Italian (Italiano)</li>
<li>Czech (Čeština)</li>
<li>Dutch (Nederlands)</li>
<li>Turkish (Türkçe)</li>
<li>Polish (Polski)</li>
<li>Indonesian (Bahasa Indonesia)</li>
</ul>
<h3>⚖️ Privacy & External Services Disclosure</h3>
To provide up-to-date exchange rates and geolocation features, this plugin may connect to selected third-party services. 
No data is sent without your explicit consent via the settings page.
<ol>
<li>
Currency & Unit Data (Google Sheets via Proxy)
<ul>
<li>Service: Downloads conversion rates from public datasets.</li>
<li>Mechanism: Requests are routed through a static redirect wrapper on <code>petrnovak.cz</code> to ensure link stability.</li>
<li>Data Sent: Your server’s IP address (standard HTTP request). No visitor data is sent.</li>
<li>Policy: <a href="https://policies.google.com/privacy" rel="nofollow ugc">Google Privacy Policy</a></li>
<li>Proxy Policy: <a href="https://petrnovak.cz/plugins/smart-convert-currency-unit-conversion/privacy-policy.php" rel="nofollow ugc">PetrNovak.cz Privacy Policy</a></li>
</ul>
</li>
<li>
Geolocation (IPinfo.io)
<ul>
<li>Service: Used only if “Auto-detect currency from IP” is enabled in settings.</li>
<li>Mechanism: Sends the visitor’s IP address to IPinfo.io to determine their country code (e.g., “US”).</li>
<li>Data Sent: Visitor IP Address.</li>
<li>Policy: <a href="https://ipinfo.io/privacy" rel="nofollow ugc">IPinfo Privacy Policy</a></li>
</ul>
</li>
</ol>

Smart Convert – Currency & Unit Conversion

The ultimate conversion engine: 153 Currencies, 105+ Units, Custom Unit Builder, GeoIP detection, and a native Gutenberg Block with live previews.

ProIT365.com

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.

Smart Convert – Currency & Unit Conversion vs CodeArt Units Converter