In general, we may receive two types of information from users.

Personal Information: In the form of return email addresses when a user sends electronic correspondence to us requesting specific information or to make a comment or request a calculator. We use this information only to respond to these requests.

Aggregated Information: We receive certain types of information about general website traffic at This does not include personally-identifying information, but does include visit frequency, which pages are visited, which search terms are used, what domain names (e.g. “”) visitors are coming from and the date and time of each visit. We gather and compile this information into an aggregate form for web traffic analysis. This analysis is related to website activity and does not include personally identifiable information.

Cookies: We use cookies to track user preference settings on however all calculators remain functional even if you disable your cookies.

Third Party Advertising: When and if ads are present, we allow third-party companies to serve ads on our site pages. These companies may use information about your visits to this and other websites in order to provide advertisements about goods and services of interest to you.

  • Third party vendors, including Google, use cookies to serve ads based on a user’s prior visits to our website.
  • Google’s use of cookies enables it and its partners to serve ads to our users based on their visits to our sites and/or other sites on the Internet.

Last updated: September 10, 2017