Last Updated: November 6, 2026
A library of small calculators is only useful if you know what you are getting: a page that shows its formula, runs the arithmetic in your browser and lets you check the answer by hand. Launch Hub offers exactly that, free and without an account. These terms set out the modest conditions that go with using the tools, mostly concerning accuracy, reuse and the fact that a calculation is not professional advice.
Trademark Notice
The names we give calculators are plain descriptions such as VAT Calculator or Dimensional Weight Calculator, chosen because they say what the page does. No trademark register is consulted before a title is published, and we do not certify that any label is free for commercial use.
Formulas, unit factors and standard constants are facts rather than proprietary marks, but the particular wording, layout and explanatory text on this site are our own work.
Acceptance of Terms
By opening a calculator and reading its result you agree to these terms, which apply to every page of the library whether you arrive from a search engine, a category page or a direct link. There is no sign-up step, so the moment of acceptance is simply the use of the tool. If you do not agree, the appropriate action is to stop using the site.
These conditions apply to casual visitors as much as to people who consult the library regularly for work.
- You understand that a calculator implements the formula printed beside it and nothing more, and that checking the result against an authoritative source is your step, not ours.
- You agree not to attempt to disrupt the site, scrape it at a rate that degrades service for others, or misrepresent our output as certified advice.
- You accept that a serious breach of these conditions may lead to your access being blocked, which for a site without accounts simply means a network-level restriction.
Service Description
Launch Hub publishes a collection of calculators and converters grouped into a handful of practical categories. Each page states the inputs it expects, the expression it applies and the rounding or unit convention behind the answer, then runs that expression locally in your browser. The point is not merely a number but a number whose derivation you can inspect.
Imagine checking a supplier quote with a margin tool: you enter two figures, see the percentage, and can reproduce it on paper from the formula shown. Basic use is free, requires no registration and does not send your inputs to a server for processing. We add tools and clarify existing ones as we find gaps in the explanations.
The library changes over time. A formula may be corrected, a unit definition updated or a worked example rewritten when we find a clearer way to present it.
User Responsibilities
You are responsible for the figures you enter and for deciding whether the answer is appropriate to your situation. A calculation that is arithmetically correct can still be the wrong basis for a filing, a quotation or a contract if an external rule has changed or an allowance was omitted.
Where a result will be published, quoted or relied upon by someone else, keep a record of the inputs and the formula version you used so the figure can be reproduced later.
- Verify any result against the authoritative rate, standard or regulation that governs your case before relying on it commercially.
- Do not use the tools to generate figures you know to be misleading, or to present an estimate as a certified professional determination.
- Enter values in the units the page asks for; mixing kilograms and pounds, or nominal and real rates, will produce a consistent but meaningless answer.
Non-Exclusivity
Nothing on Launch Hub is licensed exclusively to one reader. The same compound-interest expression is available to everyone who opens that page, and two visitors entering identical values will of course get identical answers. Openness of this kind is the point of publishing a formula rather than hiding it.
Using a tool grants no ownership over the method, the page or the wording, and no right to prevent anyone else from doing the same arithmetic. The same limit applies on every page. We state it plainly here.
Intellectual Property
The interface, layout, icons and explanatory articles on this site are our own work, while the underlying formulas and unit definitions are public facts that anyone may apply. You have a licence to use the tools and to quote short passages of the explanations for personal or internal reference. Copying the site wholesale, or republishing our articles as your own, is outside that licence.
We protect our written work under applicable copyright law and do not claim rights over standard mathematics.
- You may not sell, sublicense or redistribute the site’s HTML, scripts or articles as a standalone product without permission.
- You may link to any calculator page and describe its formula in your own words, which is exactly the kind of reuse we encourage.
Governing Law
These terms are governed by the law of the jurisdiction in which the site operator is established, without reference to conflict-of-laws rules, so that one consistent standard applies to every visitor. Courts of that jurisdiction have authority over disputes arising from the use of the library. Rights that cannot lawfully be waived under your local consumer rules remain yours.
If a provision is held unenforceable, the rest continues in effect. We prefer written notices to informal arrangements, and any waiver must be explicit rather than inferred from a period of non-enforcement.
Contact Us
Questions about these terms, or a formula that appears wrong, go to [email protected] or the Contact Us page; we answer within two working days. the author reviews this wording periodically, and our internal data protocols explains the data a message involves.
These terms are the entire agreement between you.