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The Pocket Scientist - Wallet size ruler and physical constant reference
Pocket wallet science engineering ruler card
Pocket Scientist wallet science engineering ruler card
Purse sized ruler for scientists and engineers

The Pocket Scientist - Wallet size ruler and physical constant reference

Regular price $11.50 Sale

Carry your passion for science in your pocket.

This laser-cut and laser-engraved 0.5 mm enamel-coated stainless steel reference card engineering ruler is designed for passionate scientists and engineers who may find themselves needing a quick straight edge, wondering what's next to Technetium in the Periodic Table, pausing to double-check the 6th significant figure in the speed of light or who somehow forgot the 42nd digit of pi. Keep it in your wallet at all times so you're always ready to do some science!


1) Imperial and metric straight-edge to 85 mm

2) Side reference with 10-mil resolution (250 um)

3) Arc and circle drawing tools to every 1/8th inch or 5 mm radius increment

4) Full periodic table with atomic number reference in each period (row)

5) Phone stand slot (insert another sturdy credit card)

6) 12 physical constants from physics and chemistry

7) 14 fundamental equations in the sciences 

8) Temperature, mass and pressure conversions plus trigonometry quick-reference

9) 42 digits of Pi

10) QR code which will link to rotating monthly Easter-eggs on a hidden GLG page

11) Fits any normal credit card or ID holder

12) TSA compliant and more compact than a standard 6" engineering scale ruler

Makes for a perfect unique gift for scientists or engineers starting school or at graduation!

Arrives in 5-10 days in the USA, 7-14 days internationally

Customer Reviews

5 Based on 4 Reviews
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Very handy when you can't be tied to your desk or a device

This is unique and excellent tool. I am a general chemistry lab instructor and I'm always getting asked question that require me to go look up basic information. This will live in my lab coat pocket so I will allways have it handy as I move around the lab from student to student.

Bryan B.
United States United States

THE Best

Useful, precise and giving pieces!

Jeremy F.

What a Great Handy Wallet Tool!

I am a nerd and a field scientist, and sometime you need a quick reference for random things, but also a handy drawing and measuring tool. With it's ruler in both metric and US as well as protractor curve, this has already made my life a little easier in the field. it's a great tool that is my wallets new best friend. I am very happy I bought this!!

Genius Lab Gear

So glad you love it, Jeremy! We kept a few for ourselves that is never out of arm's reach. Make sure to tell others out in the field!

Mark Hornak

My New Favorite Everyday Tool!

This is a great little gadget to have around! I've already found myself using this around the house and at work. I work for tech startup, and The Pocket Scientist has been great for taking quick measurements, making some unit conversions on the fly, and even opening packages. It is designed and constructed well, and had already held up under some minor user abuse. Best of all, it fits perfectly in my minimalist wallet, so I always have it when I need it. I would definitely recommend this to anyone looking for a useful, everyday carry utility!