Privacy
The short version: what you type into a calculator never leaves your browser, and no cookies are set unless you allow analytics.
Deutsch: Ihre Eingaben verlassen Ihren Browser nie und werden nirgends gespeichert. Cookies werden nur gesetzt, wenn Sie der Analyse ausdrücklich zustimmen — andernfalls wird das Analyse-Skript gar nicht erst geladen. Die vollständige Datenschutzerklärung folgt unten auf Englisch.
Français : Vos saisies ne quittent jamais votre navigateur et ne sont enregistrées nulle part. Aucun cookie n'est déposé sans votre accord explicite pour les statistiques — sans accord, le script n'est jamais chargé. La politique complète figure ci-dessous, en anglais.
Español: Lo que introduces nunca sale de tu navegador ni se guarda en ningún servidor. No se instala ninguna cookie salvo que aceptes expresamente las analíticas; si no aceptas, el script ni siquiera se carga. La política completa está más abajo, en inglés.
Calculations
Every calculation runs entirely in your browser. The values you enter are never transmitted to or stored on any server — there is no backend to receive them. If you use Share, the numbers appear in the URL you copy, because that is what makes the link reproduce your calculation; that is you sending them, not us.
Cookies
No cookies are set unless you allow analytics. Your theme choice, currency preference and your answer to the analytics question are kept in your browser local storage, which is not a cookie and is never sent anywhere.
If you do allow analytics, Google Analytics 4 sets its own cookies to count returning visitors. Decline, and the analytics script is never requested at all — not loaded and disabled, simply never fetched.
What analytics would collect
With consent: which pages are viewed, which calculator modes are used, whether results are copied or shared, and coarse location and device information. Never the numbers you entered. We use it to see which calculators are worth improving.
Changing your mind
Clearing this site data in your browser removes the stored choice, and the consent question is asked again on your next visit.
Third parties
Pages with affiliate links may set cookies on the destination site once you click through — that is their processing, under their policy. The links are labelled before you click. See the disclaimer.
Contact
Questions about any of this: get in touch.