Terms of use

General-purpose use

Haru Tools provides convenient general calculations. Before relying on a result for tax filings, contractual deadlines, legal age requirements, or other consequential decisions, verify it against the original information and the relevant authority’s rules.

Precision and assumptions

Displayed results may be rounded for readability. Follow each page’s units and date-inclusion rules. The site does not provide currency conversion or an official public-holiday calendar. Features and explanations may change as errors are fixed and tools improved.

Acceptable use

You may use the tools free of charge for ordinary personal or work calculations. Do not disrupt the service, misrepresent results, or generate invalid ad clicks or artificial advertising traffic.

If something looks wrong

See the corrections page for the details needed to reproduce a problem.