Pi Calculate facts
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NASA calculated that you only need 40 digits of Pi to calculate the circumference of the observable universe, to the accuracy of 1 hydrogen atom
how pi calculated?
You only need 40 digits of pi to calculate the circumference of the observable universe to a margin of error of 1 hydrogen atom
What is pi used to calculate?
In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across answering what is the most digits of pi calculated. Here are 28 of the best facts about How I Calculate Percentage and How I Calculate Percentage In Excel I managed to collect.
what does pi calculate?

Bout Emma Haruka Iwao, a Japanese computer scientist who this year broke the record of most digits of Pi calculated, at 31.4 trillion.

You only need the first 39 digits of pi to accurately calculate the spherical volume of the universe

With only 40 digits of PI, you could calculate the circumference of the entire universe to within a single hydrogen atom.

In 1873 William Shanks spent 15 years of his life calculating pi to 707 places, BY HAND. However The Last Few Years Were Wasted He Made A Mistake After The 527'th Digit.

62 decimal digits of pi is all that is needed to calculate the circumference of the known universe to Planck length precision

AlKhwarizmi from Baghdad around A.D. 800 worked on a value of pi calculated to four decimal digits: 3.1416. The term 'algorithm' derives from his name, and his text Kitab alJabr walMuqabala gives us the word 'algebra' (from alJabr, which means 'completion' or 'restoration')

By the time you get to the 39th digit of Pi, you can calculate the circumference of the known universe to within the width of an atom.

It only takes the first 39 digits of pi to calculate the circumference of the observable universe

A mathematician spent years calculating pi by hand to the 700's but made a mistake on the 528th place, so his years of work were wasted.
Why calculate pi digits?
You can easily fact check why calculate pi by examining the linked wellknown sources.
Pi has been calculated to over 13 trillion digits using a program that anyone can download and run on their PC for free.
The nth binary digit of pi can be calculated using a single formula, without knowing any information about surrounding digits. This drastically reduces the time to calculate pi using parallel computing.  source
Mathematician William Shanks' lifetime of work led to the determination of the value of Pi to 707 decimal places in the year 1873. 75 years later, calculations on a desk calculator revealed that the last 180 decimal places were incorrect.  source
When was pi first calculated?
Because there was no space in the ROM to store constants like pi or e, Sinclair printed them on the case of their cutprice scientific calculator, helping to massively undercut their rivals
How do you calculate pi?
NASA uses 15 digits of Pi to calculate interplanetary spacecraft trajectories. A calculation using 40 digits of Pi could calculate a circle of circumference of the visible universe with a margin of error less than the width of a hydrogen atom.
You can calculate pi by throwing frozen hot dogs
In 2010, Alexander J. Yee & Shigeru K. broke a world record by calculating Pi to 5 trillion digits at home on a desktop computer (twin 6core Xeon processors, 96gb ram, and 20x 2TB hard drives.) It took 90 days; and 3.8 TB disk space was needed to store the final output of decimal and hex digits.
A researcher calculated Pi to the 2 quadrillionth digit