Greek Small Letter Pi — Click to copy
π = 3.14159… The famous mathematical constant for circles. Students, engineers, and math lovers type it daily. Here’s how on any device.
Quick Reference
| Symbol | π |
|---|---|
| Name | Greek Small Letter Pi |
| Windows | Alt + 227 |
| Mac | Option + P |
| Unicode | U+03C0 |
| HTML | π |
What Is Pi?
π (3.14159…) is the ratio of a circle’s circumference to its diameter. It’s also the 16th letter of the Greek alphabet. Pi Day is March 14 (3/14)!
How to Type π on Windows
Alt code: Alt + 227 (number pad).
How to Type π on Mac
Option + P. P for Pi — easy to remember!
How to Type π in Word & Excel
Type 03C0 then Alt+X. In Excel, =PI() gives the number 3.14159.
How to Type π in Google Docs
Insert > Special characters > search “pi”.
How to Type π on Mobile
Symbols keyboard, or copy π from this page.
How to Type π in HTML
Use π or π.
Troubleshooting
1. Alt+227 needs number pad.
2. π (U+03C0) vs Π (U+03A0) — lowercase vs uppercase.
3. In Excel use =PI() for calculations.
FAQs
Alt code?
The Alt code is 227. Hold Alt, type 227 on the numeric keypad with Num Lock on, then release Alt.
Mac?
Press Option + P on a Mac — P for Pi. The π appears wherever your cursor is.
Unicode?
The Unicode code point is U+03C0, the Greek Small Letter Pi. The uppercase Π is U+03A0.
HTML?
Use the named entity π in your HTML. The decimal π renders identically.
Value of π?
π is approximately 3.14159, continuing infinitely without repeating. For most school math, 3.14 is plenty.
π vs Π?
π (U+03C0) is lowercase pi, the circle constant 3.14159…. Π (U+03A0) is uppercase, used in math for products — they are different characters.
In Excel?
For the symbol in a cell, use Insert > Symbol. For actual calculations, use the =PI() function, which returns 3.14159.
When is Pi Day?
Pi Day is March 14 (3/14), matching the first digits of π. Fans also celebrate Pi Approximation Day on July 22 (22/7).
In Word?
Type 03C0 then press Alt+X and Word converts it to π. Or use Insert > Symbol and search for pi.
Copy-paste?
Yes, π copies cleanly into documents, slides, and web pages. It is supported by all standard fonts.
Conclusion
Alt+227 / Option+P. Code: π.
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