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ScienceQuest

Terms of use

The short version: the tools are free to use and free to embed, the explanations are not free to republish, and none of the numbers carry a warranty.

Everything on this site is © 2026 ScienceQuest, all rights reserved, unless the page it appears on says otherwise. That covers the simulators, visualisers and calculators themselves, their code, their interface and their visual design, the 3D anatomy viewer, the explanatory text, the FAQ answers, the practice questions, the worked examples, the reference data compilations and the arrangement of these pages.

Two things are offered more openly, each in its own section below: embedding a tool, and reusing the images. Some of what the site serves is not ours at all, and the material that is not ours is listed below with the licence each part keeps.

Using the site

Every tool here is free to use, with no account and no sign-up. Calculations run entirely in your browser, which is described in the privacy notice. You may print any page, for yourself or for a class, and you may share any link, including the links tools generate to reproduce a particular calculation.

Embedding a tool

Embedding is welcome and needs no permission. Every tool marked as embeddable has an /embed/ route built for the purpose, and each one carries a link back to the full page. Put it in an iframe, and please keep the attribution link underneath it. You are free to mark that link rel="nofollow" if your site’s policy calls for it.

There is no fee, no registration, and no restriction on commercial or classroom use of an embed. An embed shows the tool from this site; it is not a licence to copy the tool, its code, its text or its design, which stay © 2026 ScienceQuest.

Reusing images

Images the site generates, including the figures and renders on tool pages, the share images and images downloaded from a simulator or an anatomy explorer, are an exception to what follows. They are free to reuse under CC BY 4.0, with credit and a link, and anatomy images must credit BodyParts3D as well. The image licence sets out the terms and what to write.

Material that is not ours

Some of what this site serves belongs to others. None of it is covered by the copyright above, and each part keeps the licence its owner gives it.

  • The 3D anatomy meshes, with their structure names and identifiers, are BodyParts3D, © The Database Center for Life Science, under Creative Commons Attribution 4.0 International, and you may copy them under that licence. The names and identifiers are the Foundational Model of Anatomy’s, as the BodyParts3D parts list gives them. The meshes were converted and quantised on their way into the explorers, and each explorer states that change.
  • The Latin anatomical terms come from English Wikipedia anatomy infoboxes, under Creative Commons Attribution-ShareAlike 4.0, joined by Wikidata property P1402, Foundational Model of Anatomy identifier.
  • The element and periodic trend data come from PubChem, the US National Institutes of Health, and are in the public domain. Other values, such as the IUPAC atomic weights and the CODATA constants, name their source on the page that uses them. All of them are facts, and no claim is made over them.
  • The typefaces are Inter (© 2016 The Inter Project Authors), IBM Plex Sans (© 2019 IBM Corp.) and JetBrains Mono (© 2020 The JetBrains Mono Project Authors), under the SIL Open Font License 1.1.
  • The icons are Lucide’s, © Lucide Icons and Contributors, under the ISC licence, and those Lucide derives from Feather are © Cole Bemis, under the MIT licence.
  • The code bundled into the scripts includes three.js, Svelte and Astro, under the MIT licence. The licence of every package, font and icon set the site serves is reproduced in third-party-licences.txt. Equations are typeset with KaTeX, under the MIT licence, when the site is built; no KaTeX code is served.
  • Advertisements belong to their advertisers.

What is not permitted

The explanatory text, the FAQ answers, the practice questions, the worked examples and the arrangement of these pages are original work and remain © 2026 ScienceQuest, except for the images described above. Republishing them elsewhere, with or without attribution, is not permitted. Neither is copying a tool, its code or its design, re-hosting a copy of this site, other than the material listed above under its own licence, nor republishing the reference data compilations as a dataset.

The underlying facts are a different matter and no claim is made over them. Atomic weights, physical constants and the equations of physics belong to everybody. The selection, wording and presentation of them here do not.

Quoting a short passage with attribution and a link is fine, as fair dealing allows.

No warranty on the calculations

This matters more here than the rest of this page, so it is stated plainly. Every calculation on this site is provided for learning. It is tested, with over a thousand automated checks against closed-form solutions and published values, and it is still not a certified instrument.

Do not rely on it where an error would be expensive or dangerous. That includes anything involving medication, structural loads, electrical installation, or a result that will not be independently checked. Every physical model here is an approximation with a stated range of validity, and each tool’s page says where its assumptions break down. Read that section before trusting a number.

The reference data, including the 118 element pages and the conversion tables, is compiled from published sources and quoted to a stated precision. Where a value is nominal rather than measured, the page says so.

Advertising and analytics

Where advertising is shown it is clearly labelled, and consent is handled as described in the privacy notice. Withdrawing consent is available from the footer of every page. Page views, including views of embedded tools, are counted with Cloudflare Web Analytics, which is aggregate and cookieless.

Changes and contact

These terms may change, and the version in force is the one published here. For permission requests, corrections, or to report a copy of this content appearing elsewhere, the address is on the contact page.

If you have found an error in a calculation or a piece of data, that is the most useful thing you can send. Corrections are made and the tests extended so the same error cannot return, as the corrections policy describes.