Enjoy fast, FREE delivery, exclusive deals and award-winning movies & TV shows with Prime
Try Prime
and start saving today with Fast, FREE Delivery
Amazon Prime includes:
Fast, FREE Delivery is available to Prime members. To join, select "Try Amazon Prime and start saving today with Fast, FREE Delivery" below the Add to Cart button.
Amazon Prime members enjoy:- Cardmembers earn 5% Back at Amazon.com with a Prime Credit Card.
- Unlimited Free Two-Day Delivery
- Instant streaming of thousands of movies and TV episodes with Prime Video
- A Kindle book to borrow for free each month - with no due dates
- Listen to over 2 million songs and hundreds of playlists
- Unlimited photo storage with anywhere access
Important: Your credit card will NOT be charged when you start your free trial or if you cancel during the trial period. If you're happy with Amazon Prime, do nothing. At the end of the free trial, your membership will automatically upgrade to a monthly membership.
Other Sellers on Amazon
& FREE Shipping
100% positive over last 12 months
The Pocket Engineer - Wallet Engineering Ruler Scale and Unit Conversion Reference 3 inch
Learn more
- Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
- Learn more about free returns.
- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
| Material | Stainless Steel |
| Brand | Genius Lab Gear |
| Color | Black |
| Style | Protractor |
| Graduation Range | 1/16 Inches |
About this item
- FITS WITH YOUR CREDIT CARDS: Sized exactly to a standard credit card or ID for stealthy every day carry in your wallet or money clip. Perfect for field work or lab work.
- PACKED WITH REFERENCE INFO: Never look up a basic engineering equation, physical constant or unit conversion again.
- EQUIPPED FOR TECHNICAL DRAWINGS: Always be ready to take a quick measurement or sketch a new design accurately with the ruler, protractor and angle drawing tools.
- NEVER OBSOLETE: Give a professional, student or budding young engineer a unique, thoughtful and practical gift that will stay with them for many years from homework to cutting-edge research.
- LASTS A LIFETIME: 0.5 mm thick laser-cut enamel-coated stainless steel built for a lifetime of use and abuse.
Additional Details
Frequently bought together

Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 3.31 x 2.09 x 0.03 inches; 1.27 Ounces
- Date First Available : September 5, 2019
- Manufacturer : Genius Lab Gear
- ASIN : B08M5SNYKZ
- Best Sellers Rank: #27,085 in Office Products (See Top 100 in Office Products)
- Customer Reviews:
Product Description
The Pocket Engineer is the every-day-carry wallet ruler for engineering students and professionals.
Laser-cut stainless steel allows a small, compact 3 inch form factor that easily lives in your wallet for when you need it.
We designed every single aspect of The Pocket Engineer to make it as functional and long-lasting as possible. You'll have a full drafting and measuring tool at your fingertips without digging out your 12 inch ruler. The laser-engraved unit conversions and engineering equations will save you time and keep you working on your craft instead of searching the internet or old textbooks for the exact numbers.
It's the perfect gift for an engineering student going off to college, an engineer's graduation, a passionate machine shop teacher or a professional engineer who loves sketching out new ideas at a moment's notice.
See what sets The Pocket Engineer apart from other rulers
|
|
|
|
|
|---|---|---|---|
Engineering reference infoPacked with every-day essential reference info. Save time on homework with common temperature, pressure, power, mass and length unit conversions laser-engraved on the back. No more Googling or searching the textbook index. |
Reflective forensic rulerLaser-etched high-contrast metric scale shows brightly in an image to set the pixel:length ratio so you can measure any distance in post-processing if your Pocket Engineer is in the frame. Perfect for failure analysis or field samples. |
Pipe ID measurement toolThe back corner has a handy little pipe or drill hole inner diameter measurement gauge from 1/8th to 1 1/4" openings. Just insert the corner vertically and read the markings it lines up with. |
Perfect for any job siteUsed by civil, mechanical, nuclear, and materials engineers on every job site imaginable. You'll always be ready for your next engineering challenge. |
|
|
|
|
|
|
|---|---|---|---|---|---|
| The Pocket Engineer | The Pocket Scientist | The Pocket Chemist | The Pocket Chemist Exam Edition | The Pocket Physicist | |
| Ruler | ✓ | ✓ | ✓ | ✓ | ✓ |
| Protractor | ✓ | ✓ | ✓ | ✓ | ✓ |
| Reference Info | ✓ | ✓ | ✓ | ✓ | |
| Photogrammetric scale | ✓ | ||||
| Periodic Table | ✓ | ✓ | |||
| Designed for | Engineers | Scientists | Chemists | Chemists | Physicists |
Know where your items are coming from:
How do we make these?
The founder designs each Pocket tool with meticulous dimensioning, line widths, and spacing in AutoCAD after consulting experts in each field. Our factory partner laser-cuts the shape from 0.5 mm stainless steel and coats it in hardened black enamel. Then, they laser-etch the text and ruler lines. We personally inspect and package each one before sending to Amazon's warehouse.
Why you should be a fan!
You're supporting a small business in Columbus, Ohio, started in 2019 by a Ph.D. Materials Engineer who just wants to solve everyday problems in laboratory research. Every purchase gives us more time and resources to tackle these problems and make every day in the lab a little easier.
The TL;DR
- Small business in Columbus, Ohio
- Every product designed by a Ph.D. Engineer
- Owner will personally respond to every message within 48 hours
Videos
Videos for related products

0:23
Click to play video

2 Pack 6 Inch Ruler
Mr. Pen
Videos for related products

0:50
Click to play video

The Pocket Paleontologist - Field Reference Ruler
Genius Lab Gear
Videos for related products

0:50
Click to play video

How to use The Pocket Chemist as a molecule stencil
Genius Lab Gear
Videos for related products

0:26
Click to play video

C13 Geometry Set Closer Look
Boxed Design
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonReviewed in the United States on September 28, 2022
-
Top reviews
Top reviews from the United States
There was a problem filtering reviews right now. Please try again later.
At least round the corners a tiny bit!
Otherwise I like it, but I'm going to have to put tiny corner bumpers on it like I'm a toddler because I can't stop jabbing myself with it.
My previous snarky review:
It seems like it would be a nifty tool…but what the heck?! No excuse to glue the label on the card! I was thinking maybe the paint wasn’t dry when they packaged it, but it’s laser engraved! We’ll see if some Goof-Off will remove the paper. I’m not angry at you “Genius” Lab Gear, just severely disappointed.
Definitely recommended!
Reviewed in the United States 🇺🇸 on September 28, 2022




















