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The Pocket Physicist - Wallet Ruler and Unit Conversion Reference

Tackle your physics problems with blazing efficiency. 

Packed with features in laser-cut stainless steel the size of your credit card:

  • 17 physicist unit conversions including pressure, temperature, and energy
  • 24 equations from Snell's Law to Maxwell's equations
  • 30 physical constants to save physicists time looking up references 
  • Doubles as a pocket ruler and protractor
  • Appropriate gift for physicists or physics majors grades 12 to professional.
Shipping times & rates

Free shipping in the USA! Typically arrives in 5-15 business days. Standard shipping (with tracking) available for about $3 in USA (3-7 day). We ship to Canada, the UK, EU and many other countries around the world. Go to checkout to see the rates and availability for your region.

Still not sure if you want one? We offer free returns of this product within 30 days of purchase if you're not happy with it! Grab it today with no risk and feel the difference yourself.

Bulk Orders

Bulk classroom discounts and group/logo customization are available by request. Bulk pricing starts at 10 cards and custom logos start at 100 cards.

Carbon-neutral shipping with Shopify Planet
Carbon neutral shipping on all orders

Customer Reviews

Based on 12 reviews
Great gift

I'm glad I stumbled across the Genius Lab Gear website giving me the perfect opportunity to order The Pocket Physicist as a fun back-to-school gift for my out-of-state college grad stutent. The personalized gift card offered by Lab Gear completed this surprise gift for my future physicist. Within a few days I received confirmation that the product had arrived, was well packaged and looked exactly like the photo and description on the website. It also came with a paper explaining the product and its features. My son really likes the product and keeps it at his workstation in the lab so it is available when needed. He appreciates the quality of the material, the good workmanship, the comprehensive and easy to read information on the card as well as all the additional helpful details and predicts that he will use The Pocket Physicist for a very long time. Thank you Lab Gear for a great product!


Well designed and built, exactly what I was looking for, another great tool to go along with ever-growing calculator collection.

The best

Great gift and excellent service. Internationally shipped to Chile, it arrived without problems. Best gift for all who are crazy about physics. It was truly loved and appreciated. Thank you

Tish Nunez

I received the pocket physicist ruler so quickly! Gave it as a gift to my college student. He loves it! He was so impressed with everything that is on it! I am so glad I found the Genius Lab Gear website! Thanks for the great product and service!

Lori H.
Pocket physicist-wallwt ruler

Great! Items arrived quickly, were packaged well and looked just as expected from website photo/description. Thank you! Looking forward to giving it to my dear physicist!