Pi Day is a major holiday (at least in math class!), and what’s a festive occasion without its very own carols?
The following are TeachPi.org originals, though we know there are many more great tunes floating around the Web, ripe for the singing!
Like these ones? Download our Pi Day Carols Handout for your class.

Oh, Number Pi (to the tune of ‘O, Christmas Tree’)
1. Oh, number Pi, Oh, number Pi
You’re truly transcendental.
Oh, number Pi, Oh, number Pi
You’re physical and mental.
You stretch the bounds…of all we know,
And tell our circles where to go
Oh, number Pi, Oh, number Pi
Your digits are so gentle.
2. Oh, number Pi, Oh, number Pi
Why can’t I learn you faster?
Oh, number Pi, Oh, number Pi
You’re really hard to master.
Just when I think…I’ve got you down
I flip a 6 and 5 around
Oh, number Pi, Oh, number Pi
Numerical disaster!
3. Oh, number Pi, Oh, number Pi
Why are you so specific?
Oh, number Pi, Oh, number Pi
Your digit growth’s terrific.
Ten years ago, you had a Mill
And now you’re at a couple Trill
Oh, number Pi, Oh, number Pi
You stretch to the Pacific!

Ludolph the Mathematician (to the tune of ‘Rudolph’)
We know Einstein and Euclid and Sir Isaac Newton
Lifelong devotions there ain’t no disputin’
But do you recall…
The most tireless one of them all?
Ludolph the Mathematician
Had a special thing for Pi
He made it his life’s mission
To help the number specify
All of his fellow teachers
Never understood his plan
To unlock the number’s magic
By calculating it by hand!
Then in 1599,
Ludolph set his goal…
I’ll find digit 35
With geometry as my guide!
Then how the math world loved him
All his hard work helped them see
Ludolph the Mathematician
You’ll go down in history!
(Learn more about Ludolph van Ceulen here.)

Pi Day Time (to the tune of ‘Silver Bells’)
(starting at ‘City sidewalks…’)
Random digits,
Endless digits
Transcendental in style,
In the air there’s a feeling of Pi Day.
Children laughing,
People graphing,
Worryfree for a while,
And in every math classroom you’ll hear…
Three one four…
One five nine…
It’s Pi Day Time at [our school!].
Three one four…
One five nine…
Savor those numbers, today!

Ring the Bells (to the tune of ‘Jingle Bells’)
Basking in the glow
Of a Math Class holiday.
All we need to know
Is “Pi will lead the way!”
To circles we will sing,
The digits we’ll recite
The ratio gives us everything
It’s geometry’s delight! Oh!
Ring the bells, Pi Day spells
Fun with 3 – 1 – 4!
It’s the day to celebrate
That number we adore! Oh!
Ring the bells, Pi Day spells
Fun with 3 – 1 – 4!
First we take one slice of Pi
And then we ask for more!