Effective date: November 14, 2026
Your privacy matters to us, and this policy explains it in plain words. It covers what Proportion Calculator collects when you visit proportioncalculator.app, why we collect it, who we share it with, and the choices you have.
Here is the most important part first. Our calculators run in your browser, and we do not store the numbers you type into them. You never need an account, a name or an email address to use any tool on this site.
Who We Are
Proportion Calculator is a free website that offers proportion, ratio and proportion statistics calculators, along with guides that explain the math. In this policy, “we”, “us” and “our” mean Proportion Calculator, and “you” means anyone who visits the site.
If you have any question about this policy, email us at proportioncalculator.marketing@gmail.com.
What Information We Collect
We collect as little as possible. The table below lists every type of information the site handles.
| Type of information | Do we collect it? | How and why |
|---|---|---|
| Numbers you enter in calculators | No | Your browser does the math on your device. We do not send your inputs to our servers or save them. |
| Name, email, phone | Only if you contact us | When you email us, we receive your email address and whatever you choose to write, so we can reply. |
| Usage data | Yes, anonymously where possible | Pages visited, time on page, device type, browser and approximate country help us see which tools people need. |
| Server logs | Yes, automatically | Our host records your IP address, browser type and request time to keep the site secure and running. |
| Cookies and similar technologies | Yes, with your choice | Used for analytics, advertising and remembering your settings. See our Cookie Policy. |
| Payment details | No | Everything on Proportion Calculator is free, so we never ask for payment. |
| Accounts or passwords | No | The site has no user accounts for visitors. |
How We Use Your Information
We use the limited information above to:
- Keep the site fast, secure and available.
- Understand which calculators and guides help people most, so we know what to improve or build next.
- Reply when you contact us with a question, a bug report or a request.
- Show ads that keep the tools free.
- Detect and block spam, abuse and attacks.
We do not sell your personal information. In addition, we never use the numbers you enter to build a profile of you.
Third Party Services We Use or May Use
Like most websites, we rely on a few trusted providers. Each one has its own privacy policy, and we link to them below.
- Hostinger hosts our website and stores server logs. Read the Hostinger Privacy Policy.
- Google Analytics helps us measure traffic with anonymous statistics. You can block it with the Google Analytics opt out browser add on.
- Google Search Console shows us how the site appears in Google Search. It does not track individual visitors.
- Google AdSense may show ads on our pages. We explain how ads work in the next section.
Advertising and Cookies From Google
We may use Google AdSense to display ads. Here is what that means for you, as required by the Google Publisher Policies:
- Third party vendors, including Google, use cookies to serve ads based on your prior visits to this website or other websites.
- Google’s use of advertising cookies lets Google and its partners serve ads to you based on your visits to this site and other sites on the internet.
- You may opt out of personalized advertising by visiting My Ad Center.
- You can also opt out of many third party vendors’ cookies for personalized ads at aboutads.info.
To learn more, read how Google uses information from sites that use its services. Visitors from the European Economic Area, the United Kingdom and Switzerland will see a consent message before any personalized ad cookies load.
Legal Bases for Processing (EEA and UK Visitors)
If you visit from the European Economic Area or the United Kingdom, the General Data Protection Regulation (GDPR) and UK GDPR apply. We rely on these legal bases:
- Consent for analytics and personalized advertising cookies. You can withdraw consent at any time.
- Legitimate interests for security logs and basic, privacy friendly site statistics.
- Contract or steps before a contract when you ask us a question and we reply.
Your Privacy Rights
Depending on where you live, you may have the right to:
- Ask what personal information we hold about you.
- Ask us to correct information that is wrong.
- Ask us to delete your information.
- Object to or limit how we use your information.
- Receive a copy of your information in a portable format.
- Withdraw consent you gave earlier.
California residents. Under the California Consumer Privacy Act, as amended by the CPRA, you have the right to know, delete and correct your personal information, and to opt out of its sale or sharing for cross context behavioral advertising. We do not sell personal information. Furthermore, we honor the Global Privacy Control signal as a valid opt out request.
Other US states. Residents of states such as Virginia, Colorado, Connecticut, Utah and Texas have similar rights, and we honor them in the same way.
To use any right, email proportioncalculator.marketing@gmail.com with the subject line “Privacy Request”. We respond within 30 days, and we never treat you differently for using your rights.
How Long We Keep Information
- Calculator inputs: never stored.
- Emails you send us: up to 24 months, then deleted unless an open issue needs them.
- Server logs: usually 30 to 90 days, depending on our host’s settings.
- Analytics data: up to 14 months, then deleted automatically.
How We Protect Information
We serve every page over an encrypted HTTPS connection. In addition, we keep our software up to date, limit admin access to the people who need it, and use strong, unique passwords with two step verification. No system is perfectly secure. Still, we work hard to protect the small amount of data we hold.
Children’s Privacy
Many students under 13 use proportion calculators for homework, and we welcome them. However, we do not knowingly collect personal information from children under 13, in line with the US Children’s Online Privacy Protection Act. Our Children’s Privacy Policy explains how we protect young users and how parents can contact us.
International Visitors
Our servers and service providers may sit outside your country, including in the United States and the European Union. When we transfer data across borders, we rely on providers that use recognized safeguards, such as Standard Contractual Clauses.
Links to Other Websites
Our guides link to outside sources, such as textbooks and standards bodies, so you can check our work. Those sites have their own privacy policies, and we do not control them.
Changes to This Policy
We may update this policy when our tools or the law change. When we do, we will change the effective date at the top of this page. If a change is significant, we will also show a notice on the site.
Contact Us
Questions, concerns or requests about your privacy? Email proportioncalculator.marketing@gmail.com or visit our Contact Us page. We reply within two business days.