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Multi Calculator

A premium, mobile-first calculator suite (Basic, Scientific, Percentage, BMI, Loan/EMI, Age, Unit Converter.

by Minhajul Khan · github.com/mktapphub/multi-calc-wordpress-plugin

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Install

No release zip yet. The repository archive installs, but the folder name will carry the branch suffix and updates will not flow:

wp plugin install https://github.com/mktapphub/multi-calc-wordpress-plugin/archive/refs/heads/main.zip

Readme

=== Multi Calculator=== Contributors: Minhajul Khan Requires at least: 5.8 Tested up to: 6.6 Requires PHP: 7.4 Stable tag: 1.0.0 License: License URI:

A premium, mobile-first calculator suite for WordPress. Basic, Scientific, Percentage, BMI, Loan/EMI, Age, and Unit Converter — all in one.

== Description ==

Multi Calculator Pro drops a polished, app-like calculator widget anywhere on your site via a simple shortcode:

[multi_calculator]

Included tools

  • Basic calculator (with live-preview result as you type)
  • Scientific calculator (trig, log, ln, sqrt, powers, constants)
  • Percentage calculator
  • BMI calculator
  • Loan / EMI calculator
  • Age calculator
  • Unit converter (length, weight, temperature)

Why it's different

  • No external API calls, ever. Every calculation runs entirely in the visitor's browser using a hand-written, dependency-free math engine. Nothing is sent to any server — not even yours.
  • No eval() / no Function() / no code execution. Expressions are tokenized and parsed by hand, so there is no code-execution surface for malicious input to exploit.
  • Security-first WordPress integration. Settings use the WordPress Settings API (nonces + capability checks handled for you), every output is escaped, all shortcode attributes are validated against strict allow-lists, and assets only load on pages that actually use the shortcode.
  • Premium UI. Rounded cards, soft shadows, smooth tab transitions, and a subtle "pop" animation on results — mobile-first and fully responsive, with automatic dark-mode support and a reduced-motion fallback for accessibility.
  • Fast. No jQuery dependency, no build step, no external fonts or CDNs. Two small vanilla-JS files and one CSS file.

Shortcode options

[multi_calculator]

tools="basic,bmi,loan" default="bmi"]`

  • title — heading text shown above the tabs.
  • tools — comma-separated list of tools to show: basic, scientific, percentage, bmi, loan, age, unit.
  • default — which tool tab is active on load.

Admin settings

Under Settings → Calculator Pro you can:

  • Pick an accent color
  • Enable/disable individual tools site-wide
  • Choose the default tool
  • Toggle rounded corners and animations

== Installation ==

  1. Upload the multi-calc-pro folder to /wp-content/plugins/.
  2. Activate the plugin through the "Plugins" menu in WordPress.
  3. Add [multi_calculator] to any page, post, or widget.
  4. Optionally visit Settings → Calculator Pro to customize colors and enabled tools.

== Frequently Asked Questions ==

= Does this plugin send any data to an external server? =

No. All calculations happen client-side in the visitor's browser. The plugin makes no REST API calls, no admin-ajax.php calls, and no third-party network requests of any kind.

= Can I show more than one calculator on the same page? =

Yes — each shortcode instance is fully independent and gets its own unique ID.

= Is it accessible? =

Tabs use proper ARIA roles (role="tablist", role="tab", role="tabpanel", aria-selected), and all animations respect prefers-reduced-motion.

== Changelog ==

= 1.0.0 =

  • Initial release.

Read the full README on GitHub →