Pi to 20 decimal places

Recommendation: Use the Pi App on your phone to practice memorizing Pi and to test yourself to find out how many digits of Pi you know.

Before we get to the value of Pi to 20 decimal places, note that Pi (π) starts with "3." followed by an endless number of digits or decimals. In other words, Pi is an infinite decimal and an irrational number. Furthermore, we define 20 decimal places as 20 digits after the decimal point.

Therefore, we take "Pi to 20 decimal places" to mean that you want to see "3." followed by 20 digits of Pi.

The first 20 decimal places of Pi contains 0 0s, 2 1s, 2 2s, 3 3s, 2 4s, 3 5s, 2 6s, 1 7s, 2 8s, and 3 9s. Below is "3 dot" followed by the first 20 decimals of Pi.

3 . 1 4 1 5 9 2 6 5 3 5 8 9 7 9 3 2 3 8 4 6

What is the 20th digit of Pi? The last digit of the number above is the 20th decimal of Pi. As you can see, the 20th decimal of Pi is 6. However, Pi starts with 3 which is also a digit. Thus, if you start at 3, then the twentieth digit of Pi is 4.

First 20 digits of Pi: The Pi number above gives you "3." followed by 20 digits after the decimal point. If you want to just memorize, learn or see the first 20 digits of Pi including the 3, then you can omit the last digit.

Pi Decimal Places
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Pi to 21 decimal places
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