Terms of Use

The website provides calculation tools and explanatory material for general information and education. Results depend on your inputs, units, the chosen method, rounding and stated assumptions.

A result is not personal medical, financial, legal, tax or engineering advice. Verify consequential decisions with the relevant qualified professional or authority. Do not use a calculator result alone to diagnose a condition, set a medicine dose or make an emergency decision.

You can use most calculators without registering. Optional member features include favorite lists and saved scenarios. Sign-in methods depend on what is offered on the website.

Keep your email and sign-in provider secure. Do not share sign-in links or credentials, access another person’s account or save information you are not entitled to use. You are responsible for the values and labels you choose to store.

Saved scenarios may become outdated if a method, reference or calculator changes. Recheck the inputs and assumptions when returning to an earlier calculation.

Applying does not automatically grant expert status or publication. Submitted qualifications and professional claims must be accurate, and you must have permission to use any content you provide.

Page reviews and articles are assessed separately. Publication depends on editorial approval. A published review applies to the page and scope shown; we may remove or revisit a review or article when an error, conflict or later change requires it.

By submitting material for publication, you grant the website a non-exclusive permission to display, format and edit it for the agreed publication purpose. You retain any rights you hold in your original work. Tell us before submission if additional conditions apply.

Use the website lawfully and respect other people’s privacy and intellectual property. Do not submit malware, spam, deceptive credentials or unlawful material.

Community comments require a member account and are reviewed before publication. Keep comments relevant and respectful, and do not share personal records or confidential information. You can edit or remove your own comments. Comments express their authors’ views, not professional advice or an endorsement by STCalculator. We may decline or withdraw comments that break these rules.

Do not bypass access controls, attempt to access private messages or accounts, disrupt service or use automated requests in a way that harms availability. Security concerns should be reported through the contact page without exposing personal data.

Original site text, design, graphics and software may be protected by intellectual-property law. Mathematical facts and public-domain formulas are not claimed as exclusive property merely because they appear here.

Third-party names, logos, papers and standards belong to their respective owners. Links and reference marks provide context and do not imply affiliation, certification or endorsement.

We work to improve the website, but cannot promise that every calculation or explanation is error-free, current or suitable for every situation. Availability can be interrupted by maintenance, hosting failures or security incidents.

To the extent allowed by applicable law, the service is provided on an “as is” and “as available” basis. Nothing in these terms excludes a liability or statutory right that cannot lawfully be excluded.

We may restrict accounts or submissions that abuse the service, and may update or withdraw a feature. Where a change affects saved work or an account, contact us if you need help accessing or removing your information.

External references and sign-in providers operate under their own terms and policies. Check the original source, including its date, applicable population or jurisdiction, before relying on it.

These terms can change as the service develops. Material revisions will be reflected in the updated date on this page. Continued use after a revision is subject to the revised terms and any applicable legal requirements.

For questions, contact support@stcalculator.online. The Privacy Policy explains how the website handles account details, saved scenarios and messages.