About US

We are a group of web developers who believe that the internet should be a source of free information. We try to organize the area of information on the internet within our specific areas of expertise. The main purpose of this website is to provide a comprehensive collection of free online calculators for the ease of public use. Most of the calculators on this site were developed in-house. Some calculators use open-source JavaScript components under different open-source licenses. A few calculators were licensed from other companies or developers. We also provide links to good calculators on other sites when necessary. Some of the content of this site was taken from wikipedia.com under the GNU Free Documentation License.

This site is operated by Maple Tech International LLC.

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Please contact us using the following form:

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The logos, images, scripts, and individual pages are copyrighted material. The materials on this site cannot be copied/modified without permission.

Privacy Policy

We take and respect your privacy seriously. We may collect information via cookie or web log. This is to customize services and enhance customer satisfaction.

The data we collect are:

  • The information you fill and submit by the web forms on our sites.
  • Standard web log entries, including your IP address, page URL, timestamp, etc.

We use third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here.

  • Google, as a third party vendor, uses cookies to serve ads on your site.
  • Google's use of the DART cookie enables it and its partners to serve ads to your users based on their visit to your sites and/or other sites on the Internet.
  • Users may opt out of the use of the DART cookie by visiting the Google ad and content network privacy policy.

We reserves the right to update this privacy policy with or without notice.

Terms of Use

By using our services, you agree to be bound by the following terms and conditions (the "Terms of Use").

We have no control and provide no guarantee and responsibility for the content we link to.


We reserves the right to update the Privacy Policy and Terms of Use with or without notice.