What this site is
Online Science Tools is a small educational website with interactive calculators and study notes. You can run stoichiometry and equilibrium problems, balance equations, graph functions, explore phase portraits, convert number bases, and read short guides — all in the browser, with no account required.
The domain has hosted science-education tools for a long time. The current site is a maintained set of those tools (and new ones) with clearer interfaces, worked examples, and practice problems on each calculator page.
What you will find
- 22 tools across chemistry, mathematics, and computing.
- 2 guides, including Physics GRE review material and an electric-field overview.
- Practice problems with step-by-step solutions on tool pages.
- Client-side calculation for most tools — inputs stay in your browser unless a page explicitly says otherwise.
How the tools are meant to be used
These pages are for learning and checking homework. They show intermediate structure when it helps (ICE tables, stoichiometric ratios, row operations), and they cite standard references such as IUPAC CIAAW atomic weights, NIST CODATA constants, and open teaching materials. They are not a substitute for lab protocols, graded exams, or professional engineering review.
Contact
Bug reports, corrections, and classroom feedback are welcome on the contact page. See also the Privacy Policy and Terms of Use.