Privacy Policy

Effective Date: September 2026 · Version 2.0

🔒 The Zero-Data-Collection Principle

Your calculations are private by design. When you enter loan balances, income figures, medical measurements, or personal targets into any calculator on The Online Calculator 24, the computation is executed locally inside your web browser via JavaScript. Your numerical inputs are never transmitted to our servers, stored in a database, or shared with third parties.

    Key Guarantee: We do not log, inspect, monetize, or profile the sensitive financial, health, or personal values you calculate on this website.
  

🍪 No Tracking Cookies & Privacy-First Analytics

We respect user privacy and adhere to the highest global privacy standards (GDPR, CCPA, and PECR):

No Invasive Cookies: We do not utilize third-party advertising cookies, cross-site trackers, or behavioral profiling trackers.
Aggregated Telemetry: Any pageview metrics are collected anonymously through a self-hosted counter without storing IP addresses, fingerprinting devices, or tracking personal identity.
Local Storage: Calculator favorites, recent browsing history, and dark mode theme preferences are saved exclusively in your browser's local storage (localStorage) on your physical device. You can clear them at any time with a single click.

🌐 External Links & Third Parties

Articles may reference academic journals, government standard documentation, or external regulatory datasets. Clicking external links directs you to third-party domains governed by their respective privacy terms.

📫 Privacy Inquiries

For questions regarding our privacy architecture or to exercise any data rights under GDPR or CCPA, contact our Data Protection Officer at privacy@calculators24.com or via our Contact Page.