Privacy Policy
Last updated: November 2026
Overview
CalcSystems (calcsystems.com) is a free, static financial calculator website. We do not operate user accounts, require logins, or ask you for personal information. Our calculators run entirely in your browser — no data you enter is ever sent to our servers or stored anywhere outside your own device. The analytics and other services described below do collect usage data through cookies.
Information We Do Not Collect
We do not collect, store, or transmit any of the following:
- Names, email addresses, or any contact information
- Passwords or account credentials
- Financial figures, salary data, or any numbers entered into our calculators
- Payment or banking information
All calculations happen locally in your browser using JavaScript. Nothing you type into a CalcSystems calculator leaves your device.
If you email us, we receive your email address and whatever your message contains. We use them only to reply to you.
Cookies & Tracking
The calculators themselves do not use cookies. The third-party services this site loads do, and some of those cookies are set on the calcsystems.com domain:
Advertising
Ads on this site are served by Journey by Mediavine. Mediavine and its advertising partners use cookies and similar technologies to show ads, including ads based on your visits to this and other sites, and to measure how ads perform. Mediavine adds a list of those partners and how they use data to this page. You can change your consent or opt out of targeted advertising from the privacy links in the site's footer, and read Mediavine's practices in its Legal & Privacy Center. The numbers you enter into a calculator are not sent to Mediavine by this site.
Google Analytics
We use Google Analytics 4 to measure how the site is used — such as pages visited,
time spent on the site, browser type, and whether a calculator on a page was used
(only that it was, never the numbers you entered). It sets first-party cookies
(_ga and _ga_*) that assign your browser a random ID, so
repeat visits can be counted. We see this data only in aggregate reports and do not
use it to identify you. You can opt out by installing the
Google Analytics opt-out browser add-on
or by adjusting your browser's cookie settings.
Grow by Mediavine
Grow, a service from Mediavine, provides the small bookmark button that lets you save pages to a Grow account. Its script records how pages are used, such as page views and use of that button, and stores an identifier in your browser so it can recognize a returning reader. If you create a Grow account to save pages, Grow holds that account, not us. This site doesn't send Grow the numbers you enter into a calculator. Mediavine describes how it handles this data, and how to opt out, in its Legal & Privacy Center.
Third-Party Services
CalcSystems integrates with the following third-party services, each governed by their own privacy policies:
- Google Analytics — measures site usage with cookies
- Grow by Mediavine — the bookmark button for saving pages
- Journey by Mediavine — serves the ads on this site
For full details, please review Google's Privacy Policy and Mediavine's Legal & Privacy Center.
Data Your Browser Stores
Nothing you enter is stored on our servers. Our calculators run entirely client-side. Some browsers may cache page assets (HTML, JavaScript, CSS) locally to speed up repeat visits — this is standard browser behavior and does not involve any personal data. When you switch states in the paycheck calculator, it saves your inputs in your browser's sessionStorage so they carry over to the new state's page, then deletes them as soon as that page loads. That data never leaves your device. No calculator uses localStorage, and none remembers your inputs between visits.
Children's Privacy
CalcSystems is not directed at children under the age of 13, and we do not knowingly collect any information from children. If you believe a child has provided personal information through this site, please contact us and we will take appropriate steps to address the situation.
Changes to This Policy
We may update this Privacy Policy from time to time to reflect changes in our practices or for legal and regulatory reasons. When we do, we will revise the "Last updated" date at the top of this page. We encourage you to review this policy periodically. Continued use of CalcSystems after any changes constitutes your acceptance of the updated policy.
Contact
If you have questions or concerns about this Privacy Policy, please reach out to us at contact@calcsystems.com.