Privacy
The calculators run entirely in your browser. What you type into them is not sent to us or stored anywhere.
What this site processes
| Data | Why, and on what basis | Kept for |
|---|---|---|
| Server logs: IP address, browser, page requested, time | To deliver pages and keep the site secure. Handled by our hosting provider. Legitimate interest. | The hosting provider's standard log period |
| Font requests to Google Fonts: your IP address | To display the site's typefaces. Legitimate interest. | Under Google's own policy |
This site uses no analytics, advertising or tracking cookies.
Affiliate links
When you follow a product link to a retailer, that retailer and its affiliate network may set cookies on their own site to record that you came from here. That happens under their privacy policy, not this one.
Your rights
Under the GDPR you have the right to see, correct or delete personal data held about you, and to object to how it is used. You can complain to the Dutch data protection authority, the Autoriteit Persoonsgegevens.
Last updated 15 October 2026.