Uploaded March 2024 | Updated September 2026, 2 weeks ago

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Please note down the new value of pi: 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223176

If you'd like to sign up to hear about future ridiculous maths projects that require volunteers: https://forms.gle/w44THpNJ3jWUPqHy6

Play list of all my previous calculating pi day videos: youtube.com/playlist?list=PLhtC92GarkjyYbxI3-4qzIWIRbZaw4wuP&si=DzWXgnv_vYfDgiLZ

This calculation was paid-for with surplus funding from a previous Stand-up Maths kick-starter. If you'd like to support future projects, you can join me on Patreon. My Patreon supporters keep me irrational. patreon.com/standupmaths

Huge thanks to the Pi-by-hand Committee who spent two years working on this project:
Alex Genn-Bash
Ayliean McDonald - youtube.com/@Ayliean
Ben Sparks - youtube.com/@SparksMaths
Christian Perfect
Deanna Judd
James Grime - youtube.com/@singingbanana
Katie Steckles - youtube.com/@KatieSteckles
Matthew Scroggs - youtube.com/@chalkdustmag
Max Hughes
Nicole Jacobus
Sophie Maclean - bit.ly/Sophie_Numberphile

Thanks to Steve Mould for making sure everything was legit, and only mentioning tau six or so times.

William Shanks was voiced by the excellent Ben Moor: spesh.com/ben

The amazing voice over was provided by the fantastic Gemma Arrowsmith: gemmaarrowsmith.com

CORRECTIONS
- None yet, let me know if you spot anything (other than the final 6).
- Yes, this video was released the day before Pi Day. It's so teachers have a chance to watch it and prepare their Pi Day lessons for the big day.

Filming and editing by Alex Genn-Bash
Animations by Willow Marler
Written and 'performed' by Matt Parker
Produced by Nicole Jacobus
Music by Howard Carter
Design by Simon Wright and Adam Robinson

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com
NEW BOOK: mathsgear.co.uk/products/love-triangle-by-matt-parker-signed