A handpicked collection of excellent mathematics resources across the web. Whether you're learning calculus, exploring set theory, or need a quick reference, these sites have you covered.
Reference & Encyclopedias
Encyclopedia of Mathematics
Comprehensive wiki-style encyclopedia covering all areas of mathematics with rigorous definitions and proofs.
NIST Digital Library of Mathematical Functions
The definitive reference for special functions, maintained by NIST. Essential for researchers and engineers.
Wikipedia - List of Integrals
Extensive table of common integrals organized by function type. Quick lookup for calculus students.
Integral Table
Searchable database of integral formulas with step-by-step derivations and examples.
Learning Platforms
Khan Academy - Mathematics
Free courses from arithmetic to linear algebra with video lessons, practice problems, and personalized learning.
Better Explained
Intuitive explanations of math concepts using analogies and visualizations. Makes complex ideas click.
Math is Fun
Friendly explanations of math topics from basic to advanced. Great for students and refreshers.
Maths Town
Beautiful mathematical visualizations and explorations. Perfect for seeing math come alive.
Calculus & Analysis
Paul's Online Math Notes
Comprehensive notes on Algebra, Calculus I-III, and Differential Equations. A classic resource used by millions.
Whitman Calculus
Free online calculus textbook with clear explanations and exercises. Open-source and well-maintained.
Nipissing Calculus
Interactive calculus course with worked examples and practice problems from Nipissing University.
Business Calculus
Calculus with applications to business and economics. Practical examples for real-world use.
Set Theory & Logic
Stanford Encyclopedia - Set Theory
Authoritative philosophical and mathematical overview of set theory from Stanford's SEP.
Set Theory
Dedicated resource for learning set theory from foundations to advanced topics.
Open Textbooks & Course Notes
OpenStax Mathematics
Free peer-reviewed textbooks from Rice University covering algebra, precalculus, calculus, and statistics.
LibreTexts Mathematics
Massive library of free math textbooks and resources. Community-edited and constantly growing.
SFU Math Course Notes
Course notes from Simon Fraser University covering various undergraduate math topics.
Dave's Short Trig Course
Concise and clear introduction to trigonometry. Perfect for quick review or first-time learners.
Tools & Practice
Math24
Worked examples and formulas for calculus, differential equations, and more.
ChiliMath
Step-by-step algebra lessons with clear explanations. Great for building foundational skills.
EEWeb Math Help
Math tools and calculators for engineering applications. Includes unit converters and formulas.
Sophisticated Primate - Math
Unique mathematical explorations and visualizations with an unconventional perspective.