Free Online Calculators
Last updated: April 2026
The controller responsible for data processing on this website is:
CAESS GmbH
Bubikonerstrasse 15c
8635 Dรผrnten
Switzerland
UID: CHE-323.353.451
E-Mail: simple-calculator@caess.ch
The protection of your personal data is important to us. This privacy policy informs you about which personal data we collect in connection with your use of this website, for what purpose and on what legal basis.
This privacy policy is governed by the Swiss Federal Act on Data Protection (nDSG, in force since 1 September 2023) and, where applicable, the European Union General Data Protection Regulation (GDPR). The GDPR applies insofar as we process personal data of persons located in the EU/EEA and offer them goods or services or monitor their behaviour (Art. 3(2) GDPR).
This website is hosted by:
Vercel Inc.
340 S Lemon Ave #4133
Walnut, CA 91789, USA
When you visit this website, the hosting provider automatically collects technical data in so-called server log files. This includes:
โ IP address of the requesting device โ Date and time of access โ URL of the requested page โ Browser type and version โ Operating system โ Referrer URL (previously visited page)
Legal basis: Legitimate interest in the technical provision and security of the website (Art. 6(1)(f) GDPR / Art. 31(1) nDSG). Server log files are automatically deleted after 30 days.
Vercel is based in the USA. Data transfer is based on EU Standard Contractual Clauses (SCC) pursuant to Art. 46(2)(c) GDPR and the Data Privacy Framework (DPF), to which Vercel has certified. Additionally, a Data Processing Agreement (DPA) is in place with Vercel.
More information: vercel.com/legal/privacy-policy
This website uses SSL/TLS encryption for security reasons. You can recognise an encrypted connection by the browser address bar changing from "http://" to "https://" and a lock icon being displayed. This means that data you transmit to us cannot be read by third parties.
Cookies are small text files stored on your device. We distinguish between technically necessary cookies and optional cookies that are only set with your consent.
This website uses the following technically necessary cookies:
โ Language setting: Stores the selected display language. Expires with the browser session. Contains no personal data. โ sc_consent: Stores your cookie consent status (analytics: yes/no, advertising: yes/no). Duration: 365 days. Contains no personal data.
These cookies are required for the website to function and do not require consent (Art. 6(1)(f) GDPR).
The following services only set cookies if you have given your consent via the cookie banner. Without your consent, these cookies are not set and the corresponding services are not loaded.
This website uses Google Analytics 4, a web analytics service provided by Google Ireland Limited (Gordon House, Barrow Street, Dublin 4, Ireland; parent company: Google LLC, 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA).
Google Analytics uses cookies and similar technologies to analyse your use of the website. The information generated is usually transferred to and stored on a Google server in the USA. IP anonymisation is activated on this website, meaning your IP address is truncated within the EU/EEA.
Purpose: Analysis of user behaviour to improve the website and calculators.
Legal basis: Your consent pursuant to Art. 6(1)(a) GDPR, given via the cookie consent banner. You can withdraw your consent at any time.
Storage period: 14 months (Google Analytics default).
Opt-out: You can prevent data collection by Google Analytics by declining the cookie banner or installing the Google Analytics opt-out browser add-on: tools.google.com/dlpage/gaoptout
Google Privacy Policy: policies.google.com/privacy
This website uses Google AdSense, an advertising service provided by Google Ireland Limited (Gordon House, Barrow Street, Dublin 4, Ireland).
Google AdSense uses cookies and so-called web beacons to enable the delivery and personalisation of advertisements. The following data may be collected: pages visited, interactions with ads, device and browser information, IP address (truncated).
Legal basis: Your consent pursuant to Art. 6(1)(a) GDPR, given via the cookie consent banner. Without your consent, no AdSense cookies are set and no personalised ads are displayed.
You can disable personalised advertising in Google ad settings: adssettings.google.com
This website participates in the Amazon EU S.ร r.l. Associates Program (5, Rue Plaetis, L-2338 Luxembourg). Our pages contain affiliate links to products on Amazon. Through these links, Amazon can track that you were referred to Amazon from our website.
When you click an affiliate link, Amazon sets a cookie on your device that allows the purchase to be attributed to our website. This cookie is only set when you actively click an affiliate link, not automatically when visiting the website.
Legal basis: Legitimate interest pursuant to Art. 6(1)(f) GDPR. The legitimate interest is the financing of this free website. The cookie is only triggered by your active action (clicking the link).
Amazon Privacy Policy: Amazon Privacy
This website provides an optional feedback form through which you can submit calculator suggestions. Form data is processed by:
Formspree Inc.
2000 Center Street, Suite 600
Berkeley, CA 94704, USA
When you submit the form, the following data is transmitted to Formspree: your entered text (calculator suggestion), the display language, and the URL of the current page. The form is only triggered by your active click on "Submit" โ no automatic tracking occurs.
Legal basis: Your consent via active form submission (Art. 6(1)(a) GDPR).
Data transfer to the USA is based on EU Standard Contractual Clauses. Formspree Privacy Policy: formspree.io/legal/privacy-policy
This website uses Ahrefs Web Analytics, a privacy-friendly web analytics service provided by Ahrefs Pte. Ltd. (16 Raffles Quay, #33-03 Hong Leong Building, Singapore 048581).
Ahrefs Web Analytics sets no cookies and uses no fingerprinting. Only aggregated, non-personal data is collected (page views, referrer, browser type). IP addresses are not stored.
Purpose: Measuring aggregated reach and traffic sources to improve the website.
Legal basis: Legitimate interest in anonymised reach measurement (Art. 6(1)(f) GDPR). Since no cookies are set and no personal data is stored, no consent is required.
Ahrefs Privacy Policy: ahrefs.com/privacy
This website does not require registration and has no mandatory forms or user account systems. We do not collect email addresses, names, phone numbers or other personal data through input fields. The calculators on this website perform all calculations locally in your browser โ no entered values are transmitted to our servers. The optional feedback form (Section 9a) only transmits data when you actively submit it.
Personal data is only stored for as long as necessary for the respective processing purpose:
โ Server log files (Vercel): max. 30 days โ Google Analytics: 14 months โ Google AdSense cookies: up to 2 years (with consent) โ Amazon affiliate cookie: 24 hours after click
Under applicable data protection law, you have the following rights regarding your personal data:
โ Right of access (Art. 15 GDPR / Art. 25 nDSG): You can request information about your data stored by us. โ Right to rectification (Art. 16 GDPR / Art. 32 nDSG): You can request the correction of inaccurate data. โ Right to erasure (Art. 17 GDPR): You can request the deletion of your data, provided there is no legal obligation to retain it. โ Right to restriction of processing (Art. 18 GDPR): You can request the restriction of processing of your data. โ Right to data portability (Art. 20 GDPR): You can request your data in a machine-readable format. โ Right to object (Art. 21 GDPR): You can object to the processing of your data where it is based on legitimate interest. โ Right to withdraw consent (Art. 7(3) GDPR): You can withdraw consent at any time with effect for the future.
To exercise your rights, please contact: simple-calculator@caess.ch
If you believe that the processing of your data violates data protection law, you have the right to lodge a complaint with a supervisory authority.
Switzerland:
Federal Data Protection and Information Commissioner (FDPIC)
Feldeggweg 1, 3003 Bern
www.edoeb.admin.ch
EU/EEA: You can contact the data protection authority of your country of residence.
This website is not specifically directed at children under 16 years of age. We do not knowingly collect personal data from children. Using the calculators does not require providing any personal data.
We reserve the right to update this privacy policy to adapt it to changes in the law or to changes in data processing. The current version published on this website always applies. Significant changes will be indicated by updating the date at the beginning of this policy.