How to Type Pi Symbol π
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Pi & Greek Math Symbols
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The pi symbol π represents the mathematical constant approximately equal to 3.14159. It's used extensively in mathematics, physics, engineering, and education for calculations involving circles, trigonometry, and many other areas.
This guide shows you how to type π on every platform: Windows, Mac, Chromebook, iPhone, Android, and Linux. We also include the uppercase Pi (Π), which is used for product notation in mathematics.
All Greek letter symbols on this page are standard Unicode characters — they work in any application, from math homework and scientific papers to social media posts and email.
Getting the π Symbol Onto the Page
Pi, the ratio of a circle's circumference to its diameter, is roughly 3.14159 and is written with the Greek letter π. Its Unicode code point is U+03C0, and web pages render it through the HTML entity π (or π); the capital form Π, used for products in mathematics, is U+03A0 and Π. On a Mac, Option+p types π directly on the US layout, which is by far the quickest method. Windows users with a numeric keypad can hold Alt and type 227 to get π through the legacy code page, and inside Word the sequence 03C0 followed by Alt+X also works.
Phone keyboards do not list π among their symbols, so copy it once and let your clipboard supply it afterwards. This letter is everywhere in quantitative work: the area of a circle (πr²), the period of trigonometric functions, radians instead of degrees, and countless formulas in physics and engineering. Students and teachers reach for it constantly, and because it is ordinary Unicode text it pastes cleanly into equations, calculators that accept text input, spreadsheets, and lecture notes alike.
Pi Symbol FAQ
The alt code for π is Alt+227. Hold Alt, type 227 on the numeric keypad, then release. Make sure Num Lock is enabled. This works in all Windows applications.
Press Option+P on Mac to type π directly. This keyboard shortcut works in every Mac application. No Character Viewer or special tools needed.
π (lowercase pi) represents the mathematical constant ~3.14159. Π (uppercase Pi) represents the product operator in mathematics (similar to how Σ represents summation). They're different uses of the same Greek letter.
For the value of pi, use the PI() function: =PI() returns 3.14159265358979. For the symbol π in a cell, use Alt+227 on Windows, or paste it from this page. In Google Sheets, =CHAR(960) also returns π.
Yes! π is a standard Unicode character that works on all social media platforms. It displays consistently across all devices. Math enthusiasts, students, and educators frequently use it in posts and bios.
On Mac, the Character Viewer (Control+Command+Space) has all Greek letters. On Windows, use Character Map or alt codes (α=Alt+224, β=Alt+225, δ=Alt+235). You can also copy any Greek letter from the symbols grid on this page.