Updated June 07, 2020 by Rafael Perez

The 10 Best Digital Protractors

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This wiki has been updated 15 times since it was first published in March of 2017. Whereas an old-school protractor requires lots of manual work to line up your angles, a digital model can measure more accurately without as much effort. This makes life easier for woodworkers and other contractors who rely on precise measurements daily. Plus, many of today's options can save data straight to your phone or computer, which means less time spent scribbling on your notepad. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki. If you'd like to contribute your own research to the Wiki, please get started by reviewing this introductory video.

1. Bosch 220 MF

2. GemRed Angle Finder

3. GemRed Gauge

Editor's Notes

June 04, 2020:

Downgraded the General Tools 822 since the arm locking mechanism tends to move the blade, which can be very frustrating since you have to hold the blades in place while you tighten.

Downgraded the iGaging Digital because of reports that the blades may arrive slightly warped. They can still be used effectively as is but it does limit their use as a straightedge.

March 28, 2019:

The Bosch 220 MF is a multipurpose tool from a trusted brand, making it a quality addition to the list. Professional contractors have enjoyed exceptional results using it for cutting roofs, installing crown, and creating wood products, among other applications. We removed the Calculated AccuMaster due to a lack of availability.

Dropped the iGaging Bladed several slots for a few reasons: some users have experienced issues with the battery cover not shutting flush with the tool, which can be irritating. People have also noted a tendency for the protractor to reset itself at zero on its own sometimes. On the other hand, we opted for a modest increase to the ranking of the General Tools 822 due to consistent reports of durability, accuracy, a quality locking mechanism, and a helpful auto-shutoff function — all at an affordable price.

4. True Power 677

5. Wixey WR418

6. Gain Express V-Groove

7. iGaging Digital

8. General Tools 822

9. iGaging Bladed

10. General Tools 828


Rafael Perez
Last updated on June 07, 2020 by Rafael Perez

Rafael Perez is a doctoral candidate in philosophy at the University of Rochester. His primary focus is the metaphysics of time and the philosophy of mind, with a particular interest in artificial intelligence and antirepresentational models of the mind. He has extensive experience as a mechanic, a construction worker, and a general repairman. This has allowed him to gather a wealth of knowledge on automobile repair, auto parts, carpentry, masonry, welding, and the tools used in those trades. In his spare time, he enjoys playing guitar, woodworking, and fishing.


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