Privacy policy
Last updated 31 August 2026
The short version
WattCost does not ask you to create an account and does not collect your name, email address or any other personal detail unless you choose to email us. The calculators run entirely in your browser — the state, wattage and usage figures you enter are never transmitted to us or stored anywhere.
The site does use third-party advertising and analytics, and those services set cookies. That is described in full below.
Information collected automatically
Like most websites, our hosting provider records standard server logs — IP address, browser type, referring page and time of request — for security and operational purposes. We do not use these logs to identify individuals.
Advertising cookies
This site is funded by advertising served through Google AdSense.
- Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites.
- Google’s use of advertising cookies enables it and its partners to serve ads to you based on your visit to this site and other sites on the internet.
- You may opt out of personalised advertising by visiting Google’s Ads Settings.
- You may also opt out of third-party vendor cookies for personalised advertising at aboutads.info.
- Third-party vendors and ad networks that serve ads on this site may set their own cookies, which we do not control.
Opt-out links: Google Ads Settings, Digital Advertising Alliance, Your Online Choices (EU/UK).
Analytics
We use Google Analytics to understand which pages are read and how people arrive. It sets cookies and reports aggregate usage. We do not use it to identify individual visitors, and we do not combine analytics data with any other data.
You can prevent Google Analytics collecting data with the Google Analytics opt-out browser add-on.
Your rights in the EU, UK and California
If you are in the European Economic Area or the United Kingdom, you have the right to access, correct, or request deletion of personal data held about you, and to object to processing. Because we hold no account data, in practice this concerns the cookies described above, which you can clear or block in your browser at any time.
If you are a California resident, the CCPA gives you the right to know what personal information is collected and to request its deletion. We do not sell personal information.
Children
This site is not directed at children under 13 and we do not knowingly collect information from them.
Changes and contact
Material changes to this policy will be reflected in the date at the top of this page. Questions can go to our contact page.