---
title: Calculating pi from coin flips (without randomness)
link: https://www.youtube.com/watch?v=kahGSss6SsU
source: youtube-com-standupmaths
published: 2026-03-14T10:01:04Z
updated: 2026-05-15T00:59:33Z
first_seen: 2026-09-08T10:17:10.166315Z
authors:
- Stand-up Maths
summary: "Happy Pi Day! The new value of pi is 3.2266.\n\nPi-by-hand is happening - at some time in the future - at some location! Please opt-in for updates and tell us which places would work for you: https://docs.google.com/forms/d/e/1FAIpQLScprg57Bvv1jOfoMQwriHPegTnCjik2p9xrly0zQ84ANYMfEQ/viewform?usp=dialog\n\nHuge thanks to Jim Propp for discovering this amazing bit of maths.\nFor more math details: https://arxiv.org/abs/2602.14487\nFor the backstory: https://mathenchant.wordpress.com/2026/03/12/in-praise-of-stupid-questions/\n\nCheck out Sophie Maclean's Numberphile video: https://www.youtube.com/watch?v=fczN0BCx0xs\n\nMy coin flip data is available here: https://www.dropbox.com/scl/fi/y7pueeebnt2v4i2w8sfz1/coinflip-stats.xlsx?rlkey=n9s1onlj9l6xebl1vuygl3u4l&st=4axban7n&dl=0\n\nHuge thanks to my Patreon supporters. They are flipping brilliant. http://patreon.com/standupmaths\n\nCORRECTIONS\nNothing yet. Let me know if you spot anything! \n\nFilming and editing by Alex Genn-Bash\nWritten and performed by Matt Parker\nProduced by Nicole Jacobus\nContent wrangling by Rhys Jones\nMusic by Howard Carter\nDesign by Simon Wright and Adam Robinson\n\nMATT PARKER: Stand-up Mathematician\nWebsite: http://standupmaths.com/"
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---

Happy Pi Day! The new value of pi is 3.2266.

Pi-by-hand is happening - at some time in the future - at some location! Please opt-in for updates and tell us which places would work for you: https://docs.google.com/forms/d/e/1FAIpQLScprg57Bvv1jOfoMQwriHPegTnCjik2p9xrly0zQ84ANYMfEQ/viewform?usp=dialog

Huge thanks to Jim Propp for discovering this amazing bit of maths.\
For more math details: https://arxiv.org/abs/2602.14487\
For the backstory: https://mathenchant.wordpress.com/2026/03/12/in-praise-of-stupid-questions/

Check out Sophie Maclean's Numberphile video: https://www.youtube.com/watch?v=fczN0BCx0xs

My coin flip data is available here: https://www.dropbox.com/scl/fi/y7pueeebnt2v4i2w8sfz1/coinflip-stats.xlsx?rlkey=n9s1onlj9l6xebl1vuygl3u4l&st=4axban7n&dl=0

Huge thanks to my Patreon supporters. They are flipping brilliant. http://patreon.com/standupmaths

CORRECTIONS\
Nothing yet. Let me know if you spot anything!

Filming and editing by Alex Genn-Bash\
Written and performed by Matt Parker\
Produced by Nicole Jacobus\
Content wrangling by Rhys Jones\
Music by Howard Carter\
Design by Simon Wright and Adam Robinson

MATT PARKER: Stand-up Mathematician\
Website: http://standupmaths.com/