Cookie Policy
Last updated: November 11, 2026
1. What Are Cookies
Cookies are small text files that websites place on your device (computer, phone, or tablet) when you visit them. They are widely used to make websites work more efficiently, provide a better user experience, and give site owners information about how their site is being used.
There are different types of cookies:
- First-party cookies — set by the website you are visiting directly.
- Third-party cookies — set by a domain other than the one you are visiting (e.g., analytics or font services).
- Session cookies — temporary cookies that are deleted when you close your browser.
- Persistent cookies — cookies that remain on your device for a set period or until you delete them.
2. Cookies We Use
The only cookies on this site come from Google Analytics, which we use to measure aggregated usage (see section 3). We do not use cookies for:
- Advertising or retargeting
- Session management (there are no user sessions)
- Personalization or preference storage
- Authentication (there are no user accounts)
3. Third-Party Cookies
Third-party services used by this site may set cookies on your device or receive standard request data. Below is a detailed breakdown:
Google Analytics
Google Analytics 4 helps us see which pages are used, how long visitors stay and which tool features are used. It may set these cookies on our domain:
| Cookie | Purpose | Duration |
|---|---|---|
_ga | Distinguishes one browser from another so visits can be counted | 2 years |
_ga_S6T4V70FRF | Keeps the current visit (session) together | 2 years |
Visitors in the European Economic Area, the United Kingdom and Switzerland, and anyone whose browser sends a Global Privacy Control or Do Not Track signal, get no analytics cookies; Google then receives only cookieless measurement pings. Advertising features, Google signals and ad personalization are off for everyone. The numbers you enter are never sent to Google. You can opt out completely with the Google Analytics Opt-out Browser Add-on.
Google Fonts
We use Google Fonts to display the Nunito and Sriracha typefaces. When your browser loads fonts from Google's servers, Google may receive and process:
- Your IP address
- The URL of the page requesting the font
- Browser and device information (user agent)
Google states that it does not set cookies through the Google Fonts API and does not use this data for advertising purposes. However, the request itself constitutes a connection to Google's servers. For more information, see the Google Fonts Privacy FAQ.
Hosting Provider
Our hosting provider may use technical cookies or similar technologies for essential purposes such as load balancing, DDoS protection, and security. These are operational in nature and are not used for tracking or advertising.
4. Other Storage Technologies
In addition to cookies, websites can use other browser storage mechanisms. Here is how we use (or don't use) them:
| Technology | Used? | Purpose |
|---|---|---|
| Cookies | Yes (analytics only) | Google Analytics cookies, as described in section 3 |
| Local Storage | Yes | Key pic_history: your last 10 calculations, kept only in your browser for "Recent Calculations". Never sent to us. Remove it with the "Clear" button.Key pic_dp: your decimal-places choice (0–4), saved only if you pick one. Never sent to us. |
| Session Storage | No | No session data is stored |
| IndexedDB | No | Not used |
| Web Beacons | No | No tracking pixels are used (Google Analytics sends its measurements by script, as described above) |
| Fingerprinting | No | We do not use browser fingerprinting techniques |
5. How to Control Cookies
You can control or delete cookies, including the Google Analytics cookies, through your browser settings:
- Chrome: Settings → Privacy and security → Cookies and other site data
- Firefox: Settings → Privacy & Security → Cookies and Site Data
- Safari: Preferences → Privacy → Manage Website Data
- Edge: Settings → Cookies and site permissions → Manage and delete cookies
You can also use browser extensions such as uBlock Origin or Privacy Badger to block third-party requests entirely. Note that blocking Google Fonts requests may cause the site to display in your system's default font, but this will not affect the calculator's functionality.
6. Do Not Track
Some browsers send a "Do Not Track" (DNT) or Global Privacy Control (GPC) signal. When we detect either signal, Google Analytics runs without cookies, so your browser is not recognized from one visit to the next.
7. GDPR and Cookie Consent
Under the EU General Data Protection Regulation (GDPR) and the ePrivacy Directive, websites must obtain user consent before setting non-essential cookies. To respect this, analytics cookies are switched off by default for visitors in the European Economic Area, the United Kingdom and Switzerland, so no non-essential cookies are set there and no consent banner is shown. The local storage used by the calculator only holds results you created and your decimal-places setting, and is used solely to provide those features to you. We provide this policy for full transparency about how your browser interacts with our site and the third-party services it connects to.
8. Changes to This Policy
If we add advertising or any other services that set cookies, or change how analytics is configured, we will update this Cookie Policy accordingly and, if required by law, implement a cookie consent mechanism before those cookies are set. Changes will be reflected with an updated date at the top of this page.
9. Related Policies
This Cookie Policy is part of our broader commitment to transparency. Please also review:
- Privacy Policy — how we handle personal information
- Terms of Service — the rules governing use of this site
10. Contact Us
If you have questions about this Cookie Policy, please use the Give feedback button at the bottom of any page, or open an issue on our GitHub repository if you need a reply.