First Digits of Pi

Pi up to a specified number of digits

"First Digits of Pi" Calculator

Show first
digits of Pi

How the digits are counted

Digits are counted after the decimal point: in π = 3.14159…, the first 5 digits are 14159.

Example: the first 100 digits

All 100 digits

1–1003.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679

Frequent values
DigitsEnds with
First 25…26433
First 30…83279
First 50…37510
First 100…70679
First 150…08128
First 300…41273
First 400…16094
First 500…94912
First 1,000…01989
First 2,000…59009
First 5,000…04721
First 20,000…55178
First 1,000,000…58151
First 1,000,000,000…45519

See Also

FAQ

Which digits does this tool count?

It counts the digits after the decimal point; the whole part 3 is not one of them. So the first 5 digits of pi here are 14159, and the limit you can ask for runs up to 1,000,000,000 digits.

Why does a large request show fewer digits than I asked for?

Up to 100,000 digits the table prints the whole sequence from the first digit, in rows of 100. Above that it prints the last 100,000 digits ending exactly at your limit, because a browser page cannot lay out a billion digits — for the complete sequence use the downloadable TXT and ZIP files.

How many digits of pi are needed in practice?

NASA JPL navigates interplanetary spacecraft with 15 decimal places, and about 40 digits are enough to compute the circumference of the observable universe to within the width of a hydrogen atom. Everything beyond that is used for recreation, for hardware benchmarks and for testing computation algorithms.