Maths Solver is an independent educational resource founded by former classroom teachers Daniel Whitman and Sara Lin. The site provides free, in-depth tutorials for high-school and first-year university maths, focusing on topics students commonly find challenging. Its guides cover algebra, calculus, geometry, arithmetic, word problems and exam preparation, with lessons on subjects such as quadratic equations, derivatives, integrals, limits, percentages and the Pythagorean theorem.

A key feature is the accompanying interactive calculators, which show the working step by step rather than presenting only a final answer. Students can use them to follow methods, check their own solutions and build confidence with mathematical problem-solving. Maths Solver also publishes blog articles on study strategies, exam preparation, proofs and test scoring. The content is written by its teacher founders, drawing on their classroom experience to explain concepts clearly and address common mistakes. All resources are free to access; the site is supported by unobtrusive display advertising and has no app, premium tier or login requirement.