Updated: November 2017
Digital Protractor Reviews:A digital protractor is a measuring tool that is often used to find exact angles and commonly found on jobsites for those that install crown molding, cabinetry, counters, roofs, windows, floors, etc. I remember using the basic paper protractors in math class to determine angles, especially in my geometry class. The modern protractors are easy to use and will definitely save you time no matter what project you are doing. The dial protractors, like the Starrett ProSite Protractor 505A-7, are a nice piece of equipment to own, but most owners say the digital protractor from Bosch (DWM40LK) is the route to go. We researched several leading woodworking websites and found that the Bosch protractor is the best selling digital protractor on almost all of them. Anyone who uses a compound miter saw will find this tool a great timesaver and well worth the investment. Reviews on Amazon point to the Bosch DWM40LK as the clear winner amongst all the competition in this category. At close to $175 it's not cheap, but owners repeatedly note the amount of time it saves and if you plan on doing any type of crown molding project it practically pays for itself.
Altereagle.com has an excellent website setup for those that are taking on a crown molding project and they too highly recommend the Bosch and Starrett protractors. They say to use the Bosch digital protractor on outside corners and for cutting on flat while the Starrett 505A-12 ProSite 12-Inch Dial Protractor works well on inside corners and cutting on position. Popular Mechanics is another source we have come to trust over the years when determining which measuring tools to purchase, and they too recommend the Starrett Pro-Site as an excellent angle dividing protractor. It's easy to read and gives you the exact angle you need to set your miter saw to. In talking to several contractors in our local area, they said that a digital protractor is a necessary tool in their day to day jobs in getting accurate measurements for things like roof slopes, wall corners, mitered trim work, and installing baseboards. One of my better friends who is a DIY woodworker in his home told me that the Denali 14-inch digital protractor is a decent tool compared to Bosch in terms of price. On another note, the Skil 2100DAF Digital Angle Finder receives less than stellar reviews on several sites and is probably worth avoiding. We found the most competitive pricing on Amazon.com and we really like all the owner reviews and customer feedback that Amazon provides to their site visitors. You can see an entire list of the best selling digital protractors online here.