Privacy Policy

Last updated: October 2026

This policy explains what information Opal Calculator ("we", "us") collects when you use https://opalcalculator.com and how it is used.

Information we collect

The calculators run in your browser. The numbers you type into a calculator are processed on your device and are not sent to our servers or stored by us. We do not ask you to create an account.

Like most websites, our hosting provider may log technical data such as IP address, browser type, pages requested and timestamps for security and performance purposes.

Cookies and advertising

We use Google AdSense to show ads. Google and its advertising partners may use cookies and similar technologies to serve ads based on your visits to this and other websites, to measure ad performance and to prevent fraud. Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to our website or other websites.

You can learn how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites. You can opt out of personalised advertising by visiting Google Ads Settings or aboutads.info.

Where required by law, we ask for your consent before ad cookies are used. You can change your choice by clearing this site's data in your browser.

Local storage

We store a single preference in your browser (your cookie choice). Nothing else is stored about you.

Links to other sites

Our pages link to external websites, such as government sources. We are not responsible for their privacy practices.

Children

This site is not directed at children under 13 and we do not knowingly collect their personal information.

Your rights

Depending on where you live, you may have rights to access, correct or delete personal data we hold about you. Contact us at info@opalcalculator.com and we will respond promptly.

Changes

We may update this policy from time to time. The date at the top shows when it last changed.