10 digits of pi
Pi (π) is the ratio of a circle's circumference to its diameter — approximately 3.14159. It's irrational, so its decimal expansion never ends and never repeats; below are the first 10 digits, computed from the same 1,000,000-digit dataset this site's full Pi page uses.
First 10 Digits of π
3.1415926535
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Digit Frequency
How often each digit 0–9 actually appears in these 10 digits — computed fresh from this exact page's data, not a fixed table. Pi's digits are conjectured (though not proven) to be normal, meaning every digit should appear about equally often over a long enough run — worth comparing against ~1.0, the count you'd expect from a perfectly even split of 10 digits.
0
0
1
2
2
1
3
1
4
1
5
3
6
1
7
0
8
0
9
1
Why So Few Digits Are Ever Actually Needed
Despite pi having infinitely many digits, NASA's Jet Propulsion Laboratory uses only about 15 decimal digits of pi for its most precise interplanetary navigation calculations — enough to compute the circumference of a circle the size of the observable universe to within the width of a hydrogen atom. Digit counts like the 10 on this page exist for curiosity, memorization challenges, and testing computer arithmetic — not because any real calculation needs them.
More digits of π
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