The mathematical calculation is honored every March 14.

Divide any circle’s circumference by its diameter and you get pi. But what, exactly, are its digits? Measuring physical ...

Google celebrates Pi Day 2026 with a doodle honoring Archimedes' method for estimating pi, highlighting the significance of ...

Google is marking Pi Day 2026 with a unique doodle, paying tribute to ancient Greek mathematician Archimedes and his pioneering work in calculating pi (π).

Google's 2026 Doodle celebrates Pi Day by highlighting Archimedes' polygon method to approximate pi, marking the significance ...

Archimedes determined the upper and lower range of pi by finding the perimeters of inscribed and circumscribed polygons. By doubling the number of sides of the hexagon to a 12-sided polygon, then a 24 ...

Each March 14 (3/14) mathematicians and science enthusiasts celebrate Pi Day, honoring the mathematical constant π (pi).

The number represented by pi (π) is used in calculations whenever something round (or nearly so) is involved, such as for circles, spheres, cylinders, cones and ellipses. Its value is necessary to ...

Pi refers to the ratio of a circle’s circumference to its diameter. The concept was popularised in 1988 when physicist Larry Shaw organised the first Pi Day event at the San Francisco Exploratorium.