Legal
Terms of use
Last updated: 07 August 2026
By using hasibai.com you agree to these terms. If you do not agree with them, please do not use the site.
What this site provides
hasibai.com publishes free calculators and accompanying explanatory articles. They are provided for general information and educational purposes only.
Not professional advice
Nothing on this site is financial, medical, legal or tax advice, and using it does not create any professional relationship. The finance calculators do not account for fees, taxes or the specific terms of any product offered to you. The health calculators are population-level estimates and cannot assess an individual's health or diagnose any condition. Always consult an appropriately qualified professional before acting on anything you read here.
Accuracy
Considerable care is taken to implement each formula correctly, and reported errors are corrected promptly. Even so, the calculators are provided "as is" and without warranty of any kind, express or implied, including any warranty of accuracy, fitness for a particular purpose, or uninterrupted availability. Verify any figure that matters before relying on it.
Limitation of liability
To the fullest extent permitted by law, no liability is accepted for any loss or damage — including financial loss, lost profits or consequential damage — arising from use of this site or reliance on any result it produces. Nothing in these terms limits liability where the law does not allow it to be limited.
Acceptable use
You may use the calculators freely for personal and commercial purposes. You may not attempt to disrupt the site, gain unauthorised access to it, scrape it at a volume that degrades service for others, or republish its content as your own.
Intellectual property
The text, design and code of this site are its own work and are protected by copyright. Mathematical formulas are not owned by anyone and you are free to use them. You may quote short extracts with a link back, but wholesale reproduction of the articles is not permitted.
Advertising
This site carries third-party advertising. Adverts are not endorsements, and no responsibility is taken for advertised products or services or for the content of any site an advert links to.
Changes
These terms may be revised at any time. Continued use of the site after a change constitutes acceptance of the revised terms.