Termos de Serviço

Last Updated: March 15, 2026

Welcome to Calculadora Regra de Três (www.calculadoraregrade3.com). By accessing or using our website and proportion calculators, you agree to be bound by these Terms of Service. Please read them carefully before using our tools and resources.

1. Acceptance of Terms

By using Calculadora Regra de Três, you confirm that you have read, understood, and agree to these Terms of Service. If you do not agree with any part of these terms, you should discontinue use of the website immediately. Continued use of the site constitutes acceptance of any updates or modifications to these terms.

2. Description of Services

Calculadora Regra de Três provides free, browser-based proportion calculators and educational content. Our tools include, but are not limited to:

  • Regra de Três Simples (Direct Rule of Three calculator)
  • Regra de Três Inversa (Inverse Rule of Three calculator)
  • Regra de Três Composta (Compound Rule of Three calculator)
  • Cálculo de Porcentagem (Percentage rule of three calculations)
  • Cálculo de Enfermagem (Medication dosage and serum drip calculators)
  • Step-by-step mathematical explanations and visual diagrams
  • Educational blog posts about proportions and practical math

All calculations are performed locally in your browser. We do not process or store any calculation data on our servers.

3. Use of the Website

You agree to use Calculadora Regra de Três only for lawful purposes. You may not:

  • Use the site in any way that violates applicable local, national, or international laws
  • Attempt to gain unauthorized access to the site, its servers, or any connected systems
  • Introduce malicious code, viruses, or harmful scripts
  • Scrape, crawl, or harvest content from the site without written permission
  • Reproduce, distribute, or republish our calculators, content, or educational materials without attribution
  • Use automated tools to overload or interfere with the website's performance

4. Accuracy and Disclaimer

While we strive to provide accurate and reliable proportion calculations, Calculadora Regra de Três is offered "as is" and "as available" without warranties of any kind, either express or implied. Specifically:

  • We do not guarantee that calculation results are error-free or suitable for any specific purpose
  • Our tools are intended for educational and general reference purposes only
  • Medical dosage or critical professional calculations should always be independently double-checked by qualified personnel
  • Unit conversions and results are based on standard mathematical algorithms and may involve rounding

You are responsible for verifying any results obtained from our calculators before relying on them for critical applications.

5. Intellectual Property

All content on Calculadora Regra de Três — including text, graphics, logos, calculator interfaces, educational articles, design elements, and underlying code — is the property of Calculadora Regra de Três and is protected by copyright and intellectual property laws.

You may:

  • Use the calculators for personal, educational, or commercial calculations
  • Share links to any page on our website
  • Reference our educational content with proper attribution

You may not:

  • Copy, modify, or redistribute our calculator code or interfaces
  • Use our branding, logos, or design elements without written permission
  • Frame or embed our pages on other websites without authorization

6. Third-Party Links and Services

Calculadora Regra de Três may contain links to third-party websites or integrate third-party services such as analytics tools and advertising networks. We are not responsible for the content, accuracy, or privacy practices of these external sites. Accessing third-party links is at your own risk, and we encourage you to review their terms and privacy policies.

7. Limitation of Liability

To the fullest extent permitted by law, Calculadora Regra de Três and its team shall not be liable for any direct, indirect, incidental, consequential, or punitive damages arising from:

  • Your use of or inability to use our calculators or website
  • Errors or inaccuracies in calculation results
  • Decisions made based on information provided by our tools
  • Unauthorized access to or alteration of your data
  • Any interruption or cessation of service

8. Indemnification

You agree to indemnify and hold harmless Calculadora Regra de Três, its operators, and contributors from any claims, damages, losses, or expenses (including legal fees) arising from your violation of these Terms of Service or your misuse of the website.

9. Modifications to the Service

We reserve the right to modify, suspend, or discontinue any part of Calculadora Regra de Três at any time without prior notice. This includes adding or removing calculators, changing features, or updating educational content. We are not liable to you or any third party for any modification, suspension, or discontinuation of the service.

10. Changes to These Terms

We may revise these Terms of Service at any time. Changes will be posted on this page with an updated "Last Updated" date. Your continued use of Calculadora Regra de Três after any changes constitutes your acceptance of the revised terms. We encourage you to review this page periodically.

11. Governing Law

These Terms of Service shall be governed by and construed in accordance with applicable laws. Any disputes arising from the use of Calculadora Regra de Três shall be resolved through appropriate legal channels.

12. Contact Us

If you have any questions or concerns about these Terms of Service, please contact us: