Equation Encyclopedia — Master 2,000+ STEM Formulas
Equation Encyclopedia is the free, comprehensive equation library and learning platform for students and professionals. Browse 2,000+ verified formulas across Mathematics, Physics, Chemistry, Biology, Engineering, Finance, and Economics — each with interactive calculators, step-by-step derivations, rearrangement tools, and practice problems.
Why Students Choose Equation Encyclopedia
- 2,000+ verified equations — covering A-Level, IB, AP, SAT, and university-level STEM subjects, all free to access.
- Interactive calculators — solve formulas instantly. Enter known values and compute unknowns with unit-aware calculations.
- 4,000+ rearrangements — every formula rearranged for each variable, with step-by-step algebraic working shown.
- 51 game modes — active-recall practice including Flash Recall, Equation Feud, Symbol Sprint, and Quiz modes to strengthen memory.
- AI-powered tools — use AI to search equations, generate cheat sheets, explain formulas, and create study materials.
- Cheat sheets & flashcards — build printable revision sheets. Drag equations, add notes, and export for exams.
- Multi-language support — available in 16 languages including Spanish, French, German, Japanese, Korean, Chinese, and more.
Subjects Covered
Mathematics (algebra, calculus, geometry, trigonometry, statistics, linear algebra, number theory), Physics (mechanics, waves, electricity, magnetism, thermodynamics, quantum, nuclear, astrophysics), Chemistry (physical, organic, inorganic, thermodynamics, kinetics, equilibria, electrochemistry), Biology (genetics, ecology, biochemistry, physiology), Engineering (civil, electrical, mechanical, aerospace), Finance (compound interest, annuities, present value, bond pricing), Economics (supply, demand, elasticity, GDP), Data & Computing (algorithms, statistics, regression), and more.
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