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Mathematics

Interactive: Science of Food: Cooking conversion calculator
Cooking Conversion Calculator

Use this calculator to convert between measurement systems.

Lightning bolts, river deltas, tree branches, and coastlines are all examples of patterns in nature called fractals. In...
Fractal Patterns

Lightning bolts, river deltas, tree branches, and coastlines are all examples of patterns in nature called fractals. In this Snack, you get a striking hands-on introduction to fractal patterns and how they’re formed.

Pi Toss - Science Snack Activity

Asked to get an estimate for the famed mathematical constant pi (π), try the random tossing of toothpicks.

This video describes the interaction at the exhibit Pi Toss, which uses a statistical technique called "Buffon's Needle"...
Pi Toss

This video describes the interaction at the exhibit Pi Toss, which uses a statistical technique called "Buffon's Needle" to calculate pi.

Pi Shrine
Pi Shrine

This circular piece of Exploratorium history has held pride of place in π Day festivities since 1988.

Prince of Pi

Meet Exploratorium physicist Larry Shaw, the originator of Pi Day.

Science activity using straight lines to learn about circles
Pi Graph

Use straight lines to learn about circles.

Science activity to demonstrate pi using circumference and string
Cutting Pi

String and scissors are all you need to find pi all around you.

Pi Has Your Number
Pi Has Your Number

Use a touchscreen to search for any number hidden in the first 3 million digits of pi.

Square Wheel
Square Wheel

A square wheel can roll smoothly—if the "road" is the right shape.

Café Wall Illusion
Café Wall Illusion

These tiles aren't really crooked–they just look that way.

Pi Toss
Pi Toss

Toss some chips to estimate pi.

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