Terms of Use

Last updated: September 15, 2026

1. Acceptance

By accessing or using IngCalc you agree to these Terms of Use. If you do not agree, please do not use the site.

2. What the service is

IngCalc provides free, browser-based technical calculators and reference content for engineering-related work. All tools are informational: they produce estimates based on published formulas and documented assumptions. They are not professional certifications, code-compliance determinations or engineering advice — see the Disclaimer.

3. Permitted use

• Use the tools freely, for personal or professional reference, at no cost.
• Link to any page from your own site or documents.

4. Prohibited use

• Scraping, bulk-reproducing or republishing the tools or editorial content without written permission.
• Selling or bundling access to the site or its content.
• Attempting to disrupt, overload, reverse-engineer for abuse, or gain unauthorized access to the service.
• Generating artificial traffic or interactions, including on advertising (this also violates our ad partners’ policies).
• Presenting the site or its results as your own product or as certified engineering work.

5. Intellectual property

The site design, code, tool definitions and editorial text are © 2026 Miguel Iglesias Valenzuela / IngCalc. All rights reserved. Underlying formulas, standards and engineering principles belong to their respective publishers (NEC, ASHRAE, ISO, NREL and others) — we cite and reference them; we do not reproduce copyrighted standard text.

6. Availability and modifications

The site is provided as-is and as-available. We may add, change, suspend or remove tools or content at any time, and we do not guarantee uninterrupted availability. Correctness of any specific result is not guaranteed — see the Disclaimer.

7. External links

We link to standards bodies and official references to document methodology. We are not affiliated with those organizations and are not responsible for third-party content or availability.

8. Your responsibility

You are responsible for how you use any result obtained here, including verifying it against applicable codes, standards, manufacturer documentation and qualified professionals before relying on it in practice.

9. Limitation of liability

To the maximum extent permitted by law, IngCalc and its operator are not liable for any damages arising from use of the site or reliance on calculated results — including equipment damage, code violations, financial loss or personal injury.

10. Changes to these terms

We may update these terms; the date above reflects the current version. Continued use after changes constitutes acceptance.

11. Contact

Questions about these terms: Contact.