CalcLibrary

Terms of Use

This English text is provided for convenience. The German-language version at /de/terms is authoritative for German users. Other locales fall back to this English version.

Effective: 2026-04-28

These Terms of Use govern the use of the website calclibrary.io and the embeddable calculator widgets provided by CalcLibrary. By using the website or an embedded calculator, you accept these Terms.

1. Scope

These Terms apply to all use of the website calclibrary.io, including every page accessible under that domain, and to the embeddable calculator widgets that may be embedded on third-party websites.

The operator and contracting party is:

Benjamin Kannel
Kalkhofstraße 9
70567 Stuttgart
Germany
Email: info@calclibrary.io

2. Service description

CalcLibrary is a free, multilingual, static calculator site. All calculations run exclusively client-side in the user's browser; there is no server-side calculation, and no inputs or results are stored on a server.

Results are estimates only and do not constitute professional advice. The operator may add, modify, or remove calculators at any time without notice and without compensation.

The service is provided gratuitously; no consideration is required from users.

3. Acceptance and user status

Use of the website constitutes acceptance of these Terms and creates a usage relationship between the operator and the user on the basis of these Terms. No account or registration is required, and none is offered.

Users may be consumers within the meaning of § 13 of the German Civil Code (BGB) or businesses within the meaning of § 14 BGB. These Terms apply to both groups equally. Mandatory consumer protection rules of the user's habitual residence remain unaffected.

4. Use of the website

Permitted uses include in particular viewing the content, interacting with the calculators, and using the results displayed in the browser for your own purposes.

Prohibited uses include in particular:

  • scraping, crawling, and automated mass requests;
  • reverse engineering, decompilation, or disassembly of the website or any of its components;
  • circumventing access, security, or rate-limiting controls;
  • any unlawful use;
  • denial-of-service-style traffic patterns;
  • attempts to extract or copy calculator schemas or compute logic.

The operator may revoke access immediately and without prior notice for any breach.

5. Embedding the calculators

License grant. The operator grants the user a limited, non-exclusive, non-transferable, revocable, royalty-free, worldwide license to embed the official calculator iframe widget on third-party websites by means of the snippet provided in the embed dialog.

Permitted. Embedding is permitted on personal and commercial third-party websites. No separate attribution beyond the marking displayed inside the iframe itself is required.

Obligations. Embedders must use the unmodified loader script and iframe URL as provided. Embedders must not obscure, hide, frame out, restyle to remove, or otherwise diminish the CalcLibrary branding or the link inside the iframe. Embedders must not proxy or cache the iframe URL through their own domain.

Prohibited. The following are prohibited in particular:

  • scraping or downloading the calculator;
  • redistributing the calculator code or schemas;
  • building a competing or derivative calculator service from CalcLibrary content;
  • modifying calculator inputs or outputs in a manner liable to mislead users;
  • using embeds in connection with unlawful content, in particular hate speech, harassment, or content violating German criminal law;
  • circumventing rate limits or future monetization mechanisms.

Reservations. The embed license is revocable at any time, without cause and without notice. The operator may modify, throttle, monetize (including by inserting advertising into embeds), discontinue, or otherwise change embeds at any time. There is no SLA, no uptime guarantee, no obligation to maintain backward compatibility, and no support obligation in respect of embeds. Embedders rely on the embed at their own risk and shall hold the operator harmless for any consequence of embed changes or discontinuation.

6. Intellectual property

All code, design, calculator logic, schemas, brand, trade dress, and content of CalcLibrary are the intellectual property of Benjamin Kannel.

"CalcLibrary" is a trademark of the operator.

The limited embed license under § 5 is the only right granted by these Terms; no other rights are transferred, expressly or by implication.

7. Availability

The service is provided on a best-effort basis. There is no SLA and no uptime guarantee.

Maintenance, technical issues, third-party outages, and discontinuation may cause periods of unavailability.

The operator may discontinue the service or any feature at any time, without notice and without compensation.

8. Warranty

The service is provided "as is" and without warranty of any kind.

Beyond mandatory statutory rights, the operator gives no express or implied warranty of accuracy, completeness, currentness, merchantability, fitness for a particular purpose, or non-infringement.

Calculator results are estimates only and are not a substitute for professional financial, medical, tax, legal, or engineering advice.

Users must consult an appropriately qualified licensed professional before relying on results for any important decision.

9. Liability

The German-language version of this section is authoritative. The English text below is a convenience translation and does not extend or restrict the liability regime defined in the German clause.

The operator is liable without limitation for intent and gross negligence, and for damage to life, body, or health. For damage caused by simple (light) negligence in breach of essential contractual obligations (Kardinalpflichten), the operator's liability is limited to the typical damage foreseeable at the time of contract conclusion for this type of service. Essential contractual obligations are those obligations whose fulfilment enables the proper performance of the contract in the first place and on whose fulfilment the contracting party regularly relies and may rely. Any further liability for simple negligence is excluded. In particular, the operator is not liable for indirect damages, consequential damages, lost profits, lost data, business interruption, or damage arising from use or unavailability of the service. The foregoing limitations do not apply to mandatory liability under the German Product Liability Act (Produkthaftungsgesetz). They also apply for the benefit of the operator's vicarious agents (Erfüllungsgehilfen).

10. Privacy

Processing of personal data is described in our Privacy Notice.

11. Changes to these Terms

The operator may modify these Terms at any time. Modified Terms take effect upon publication on this page.

Continued use of the service after publication constitutes acceptance of the modified Terms. Users who do not accept the modified Terms must discontinue use of the service.

The current version is always available at /en/terms.

12. Final provisions

These Terms are governed by the laws of the Federal Republic of Germany, excluding the United Nations Convention on Contracts for the International Sale of Goods (CISG). Mandatory consumer protection rules of the user's habitual residence remain unaffected.

The exclusive place of jurisdiction for all disputes with merchants (Kaufleute), legal persons under public law, and special funds under public law is Stuttgart (§ 38 ZPO). For consumers, statutory rules on jurisdiction remain unaffected.

Should any provision of these Terms be or become invalid, the validity of the remaining provisions remains unaffected.

The German-language version of these Terms is authoritative; versions in other languages are non-binding convenience translations.

The European Commission provides a platform for online dispute resolution (ODR): https://ec.europa.eu/consumers/odr/.