Cookies Policy

Last updated: January 2026

What Are Cookies?

Cookies are small data files stored on your device by websites you visit. localStorage is a similar browser mechanism that persists data across sessions.

What We Use

• Preferences (localStorage): Your dark/light mode selection is stored so it persists across visits.
• Calculator State (localStorage): Your calculator inputs and saved reports are stored so you can resume your work.
• Google Analytics cookies: Anonymized aggregate site-usage measurement.
• Google AdSense cookies: Google and its partners use these to serve ads, including personalized ads based on your prior visits to this and other sites, unless you opt out.

How To Disable

You can disable cookies in your browser settings. Doing so will impact site functionality — your calculator state and theme preference will not persist.

Opting Out of Personalized Ads

You can turn off personalized advertising at Google Ads Settings, or opt out of third-party vendors' advertising cookies at aboutads.info/choices. Opting out does not remove ads; it makes them non-personalized.

Clearing Your Data

Clearing your browser storage removes all ConstrCalc data from your device. It cannot be recovered — export a JSON snapshot from the calculator first if you want to keep an estimate.

Third-Party Cookies

Third parties (Google, CDN providers) set their own cookies per their policies. Review Google's cookie policy and how Google uses advertising cookies for detail.