Privacy Policy

We collect data in the following ways:

• Calculator inputs: All values you enter (weight, height, age, etc.) are stored only in your browser's localStorage. They never leave your device.
• Analytics data: If you accept cookies, Google Analytics 4 collects anonymized usage data such as pages visited, session duration, and device type.
• Advertising data: If you accept cookies, Google AdSense may collect data to serve personalized ads, including cookies and device identifiers.
• Preferences: Your language, unit system, and cookie consent choices are stored in localStorage.

We process data based on the following legal grounds under GDPR Article 6:

• Consent (Art. 6(1)(a)): Analytics and advertising cookies are only activated after you explicitly accept them via the consent banner.
• Legitimate interest (Art. 6(1)(f)): Basic site functionality and localStorage preferences are necessary for the service to operate.

If you are in the European Economic Area, you have the right to:

• Access: Request a copy of any personal data we hold about you.
• Rectification: Request correction of inaccurate data.
• Erasure: Request deletion of your data ("right to be forgotten").
• Restriction: Request that we limit processing of your data.
• Data portability: Receive your data in a structured, machine-readable format.
• Objection: Object to processing based on legitimate interest.
• Withdraw consent: Withdraw cookie consent at any time by clearing your browser data or rejecting cookies when the banner reappears.

If you are a California resident, you have the following rights under the California Consumer Privacy Act:

• Right to know: You can request what personal information we collect and how it is used.
• Right to delete: You can request deletion of your personal information.
• Right to opt-out: You can opt out of the "sale" of personal information. Note: we do not sell personal data, but ad networks may use cookies that qualify as a "sale" under CCPA.
• Non-discrimination: We will not discriminate against you for exercising your rights.

To opt out of personalized advertising, reject cookies via the consent banner or contact us at the address below.

We use the following types of cookies:

• Essential (localStorage): Language preference, unit system, cookie consent status, and calculator history. These do not require consent as they are necessary for basic functionality.
• Analytics (Google Analytics 4): Only loaded after you accept cookies. Collects anonymized data about site usage to help us improve the service.
• Advertising (Google AdSense): Only loaded after you accept cookies. May use cookies and similar technologies to serve relevant ads.

You can manage or delete cookies through your browser settings at any time.

• localStorage data: Retained on your device until you clear your browser data. We have no access to this data.
• Google Analytics: Data is retained for 14 months, after which it is automatically deleted. See Google's data retention policies for details.
• AdSense cookies: Retention varies by cookie. See Google's advertising policies for specific durations.

We use the following third-party services:

• Google Analytics 4: For anonymized site analytics. Google Privacy Policy
• Google AdSense: For displaying advertisements. Google Ads Policy

These services may transfer data to servers in the United States. Google participates in the EU-U.S. Data Privacy Framework.

If you have questions about this privacy policy or wish to exercise your data rights, contact us at:

Email: privacy@calculatorworld.app

We will respond to your request within 30 days.