GlyphIndexExample notation
Circumference C = 2πr.
The letter denotes the familiar circle constant in this formula.
Greek pi
Greek pi is Π in uppercase and π in lowercase. Lowercase π denotes the circle constant in formulas such as C = 2πr.
GREEK CAPITAL LETTER PI
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Character details
♡→✦
3 code pointsMeaning and context
Greek pi is Π in uppercase and π in lowercase. Lowercase π denotes the circle constant in formulas such as C = 2πr.
How to use it
Keep π in the circumference formula. When multiplying a series of terms, use the product operator ∏ rather than capital Π.
Examples
Uppercase and lowercase
Π U+03A0 / π U+03C0
Uppercase and lowercase use different code points. Copy the case you need.
Similar shapes, different characters
Compare the lookalike
U+220FGreek capital pi U+03A0 is distinct from the product operator U+220F.
DetailsGreek small pi
U+03C0Copy the lowercase letter when that is the case used in the source material.
Sources and method
- Unicode 18.0.0 character database — Pinned standard character identities and properties; the application computes UTF encodings from the original text.
- Unicode normalization forms (Unicode 18.0.0)