Equation Geek Watch

This smart and stylish watch features the equivalent notation of each number.


Geeks: We've Got Your Number

Regular numbers? Those are for amateurs. Bring your inner genius out for all to envy with a smart and stylish watch that features the equivalent notation of each number.

For nascent mathematicians and victims of the occasional memory lapse, a cheat sheet is included with each watch:
1: i is equal to the square root of -1, so i^2= -1. The absolute value of -1 is 1.
2: This represents 2 in binary code.
3: The cube root of 27
4: 11 base 3, which represents 4 in the ternary system
5: Log(20x)=2 is equivalent to 20x=10^2 or 20x=100, where x=5.
6: Euler's product formula: phi(p^k)=(p^k)(1-(1/p)), where (p^k)=9
7: This is a binomial coefficient, so with the formula n/k = (n!)/((k!)(n-k)!), n/k=7.
8: This is a natural logarithm where ln(e^x)=x, so ln(e^8)=8.
9: This summation is equal to 3(1)+3(2)=3+6=9.
10: Since clocks "wrap around" every 12 hours, the hour number starts over after it reaches 12. This is arithmetic modulo 12. 10mod12 is 10:00, and 16mod12 would be 4:00, for example.
11: B'L is Legendre's constant, which is equal to 1, so this equation becomes the square root of 121, which is 11.
12: Hexadecimal representation of 12

Made in China. Japanese movement. 3 ATM water and splash resistant.

For more geeky timepieces, check out the Equation Geek Clock .

Only at UncommonGoods
Made from
stainless steel, steel, Glass
Face 1.65" dia., case .315" H; Adjustable band 9" L, 20mm W
Item ID

Still haven't found the details you're looking for? Check out our Product Q&A!

Most of our items are in stock and will ship quickly. Orders for in-stock items placed before 5pm ET Monday through Friday, excluding Federal holidays, will ship in the US:
Economy shipping:
within 8 days, arriving no later than the 9th business day after the order was placed.
Standard shipping:
within 4 days, arriving 5 business days after the order was placed.
Preferred shipping:
within 2 days, arriving 3 business days after the order was placed.
Expedited shipping:
within 1 day, arriving 2 business days after the order was placed.
Express shipping:
will ship the same day and arrive 1 business day later.

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Was the perfect gift!


This gift was for my son's math teacher. He happened to be my son's first male teacher, and became his favorite teacher so far, so I knew we had to get him something special. This teacher took a special interest in my son and was wonderful!



Engineer Dad Loved It


It looks great and is a awesome conversation piece.

St. Louis




Very disappointed about the quality of this item. My son was so happy about this watch, but alas the hands are loose after not even 2 months.



I might buy this again. Definitely


Perfect for my son-in-law, an engineer.





The gift was received very well! Yeah, it works great!

Sedona AZ


Great buy


Was a gift for my boyfriend.

Lansing, Michigan




Was very pleased when it came. Picture did not do it justice

Syracuse NY


Unique gift


So far the person loves it and wears it everyday.

Orlando, FL


Perfect Gift for Dissertation Advisor


As a MIT and Harvard grad, and now getting a doctorate in engineering, I had my eye on this watch for over 6 months, but it was only available for men, with one band style. When I came back to the site to buy it as a gift, I was delighted to see the choice of the mesh and black bands for men, which made giving as a gift easy to fit different personality types. AND FINALLY a women's version! Would like to see the band options for women too.

Washington, D.C.


Excellent gift for Graduation


It was a gift and the person who it was gifted to has been wearing it ever since . He loved it.



Equation Geek Watch

4.5 103


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