The word Calculus comes from Latin meaning "small stone",
Because it is like understanding something by looking at small pieces.

Differential Calculus cuts something into small pieces to find how it changes.

Integral Calculus joins (integrates) the small pieces together to find how much there is.



Read Introduction to Calculus or "how fast right now?"


Limits are all about approaching. Sometimes you can't work something out directly, but you can see what it should be as you get closer and closer!

Introduction to Limits

Limits and Infinity

Evaluating Limits

Limits (Formal Definition)


Continuous Functions  

Derivatives (Differential Calculus)

The Derivative is the "rate of change" or slope of a function.

Introduction to Derivatives

Slope of a Function at a Point (Interactive)

Derivatives as dy/dx

Derivative Plotter

Derivative Rules

Second Derivative


Finding Maxima and Minima using Derivatives

Concave Upwards and Downwards and Inflection Points

Taylor Series (uses derivatives)


Integration (Integral Calculus)

Integration can be used to find areas, volumes, central points and many useful things.

Introduction to Integration

Integration Rules

Integration by Parts

Integration by Substitution

Definite Integrals


If you want more Calculus topics covered, let me know which ones.