Terms of Use

Last updated: April 28, 2026

Plain-English summary

• Use the tools freely. Don't abuse the service.
• Tools are for information only — not professional advice.
• We're not liable for decisions you make based on the results.
• Content is © CalcLab; methodology pages are CC BY 4.0.

Acceptance

By using CalcLab you agree to these Terms.

Permitted use

You may use CalcLab for personal and commercial purposes free of charge. You may not (a) scrape the site at unreasonable rates, (b) attempt to disrupt service availability, or (c) republish entire pages as your own.

No professional advice

Tools on CalcLab are provided for informational and educational purposes only. They are not a substitute for medical, legal, financial, engineering, tax, or other professional advice. Always consult a qualified professional before making decisions that depend on accuracy.

Limitation of liability

To the maximum extent permitted by law, CalcLab is not liable for any direct, indirect, incidental, special, consequential, or punitive damages arising out of your use of CalcLab or any decision based on its output.

Intellectual property

Tool implementations, branding, and visuals are © CalcLab. Methodology and explainer text on tool pages is licensed Creative Commons Attribution 4.0 (CC BY 4.0) — you may reuse with credit and a link back to the source page.

Changes

We may update these Terms over time. We'll update the "last updated" date when we do.

Contact

Questions: calc@3stf.com.