Last updated: April 24, 2026
How our tools are built
Eon Tools builds free, browser based calculators and utilities for everyday, educational, and practical use. Every tool is built in-house by our engineering team and, where domain expertise matters, reviewed by a practicing subject-matter expert before it goes live. You can see our team and their fields here.
We aim for accuracy, test for edge cases, and document methods. Tools marked Verified have been through this full process.
What our tools are for
Our tools are designed to give you fast, accurate answers for the calculations and tasks they describe. They are reliable for their intended purposes, and designed to save the user's time.
They are not a replacement for professional judgment in regulated or high stakes decisions. No online calculator is. For those decisions, use our tools to do the math, and then talk to a qualified professional about what the math means for your situation.
Local-only processing
Calculations run locally in your browser. We do not upload or store your tool inputs or results unless you intentionally submit information through forms such as contact or feedback. Local processing improves privacy and speed.
Category specific notes
Health: Tools are for informational use and are not intended for diagnosis, treatment, or urgent medical decisions. Please consult a licensed clinician for anything affecting your health.
Finance: Our finance tools are reviewed by qualified analysts, and results are based on formulas they apply. They are not investment, tax, or accounting advice. Results are estimates and may omit fees, taxes, or local rules.
Construction and Physics: Our construction tools are reviewed by structural engineers, and our physics tools by practicing physicists. Results are useful for planning, estimation, and education. Building codes, safety factors, and professional specifications apply.
Generator Tools: Generated content is algorithmically produced and may not be unique, original, or suitable for every context. Review generated content before using it.
Password/Random: Our password generators run entirely in your browser using standard cryptographic randomness. Overall security also depends on how you store, rotate, and handle your credentials.
Third-party links, libraries, and ads
Eon Tools may reference or link to third-party sites and may use third-party libraries. We do not control or endorse third-party content and are not responsible for it. We display ads to fund free tools; see the Privacy Policy for cookies/consent information.
Limitation of liability
To the maximum extent permitted by law, Eon Tools (and its owners, employees, and contributors) shall not be liable for any indirect, incidental, special, consequential, exemplary, or punitive damages, or any loss of profits, data, or goodwill, arising out of or related to your use of the Service or reliance on its outputs.
Changes
We may update this Disclaimer from time to time. Changes take effect when posted on this page.
Contact
Questions? Email [email protected] or use our Contact form.