Last updated: October 18, 2026

Cookie policy

Essential cookies

There is no login, so the site sets no authentication cookies. We use local storage to remember your consent choice and, on the pages you use, to keep your recent calculations on your own device.

Optional cookies and local storage

With your consent, we may use anonymous analytics or advertising technologies to understand performance and fund the service. Every page stores your consent choice in local storage, and the saved area keeps your recent calculation results there too. Nothing is uploaded.

Managing consent

You can clear cookies and site data in your browser settings. If you reject analytics, we stop collecting usage data for your visits, and no part of the calculators stops working. Where third-party technologies are used, their providers offer additional controls in their own policies.

GDPR and ePrivacy

We request consent for non-essential technologies where required by law and do not make access to the free calculators conditional on accepting optional tracking.