Privacy Policy

WattMath is a free, anonymous tool. We do not require account creation, and we do not collect personally identifiable information through our calculators.

Analytics

We use Google Analytics 4 (GA4) to understand aggregate traffic patterns — which calculators are most used, where our visitors come from, and how the site performs. GA4 collects anonymized usage data such as page views, session duration, and general geographic region (country/state level). We do not enable Google Signals or any cross-device tracking feature.

You can opt out of Google Analytics tracking at any time by installing the Google Analytics Opt-out Browser Add-on .

Calculator Inputs

When you use a WattMath calculator, your inputs (ZIP code, monthly bill, vehicle information, etc.) are processed in your browser and sent to our backend API solely to retrieve solar production data and electricity rates. We do not store, log, or associate your inputs with any identifier.

Cookies

WattMath does not set cookies beyond those placed by Google Analytics. We do not use advertising cookies, session cookies, or persistent cookies for our own purposes.

Third-Party Data

We do not sell, rent, or share your data with any third party for commercial purposes. The only third-party service that receives data about your visit is Google Analytics.

Affiliate Links

Some pages may contain affiliate links to products (e.g., Amazon Associates) or services (e.g., EnergySage). Clicking these links may place a cookie from the affiliate platform. We disclose affiliate relationships where they appear.

Contact

Questions about this policy? Email us at privacy@wattmath.com.