Calculated Industries4080 Construction Master Pro Trig Advanced Construction Math Feet-Inch-Fraction Calculator with Full Trig Function for Architects, Engineers, Contractors, Estimators and Framers

Product is great, but the workbook should be bundled with the 4065 calc rather than the 4080. I was disappointed to find a good portion of the workbook undoable because the 4080 replaces the Length, Width, and Height buttons with the Trig (sin, cos, tan) buttons. The bundle really needs to be changed. I had to order the 4065 and now have to return this 4080.

By trade, I am a structural and miscellaneous steel draftsman. When I started in this line of work, there was a limited amount of calculators to choose from, and most of them required the user to work in decimal form only. Then, I found the feet-inch calculator from Calculated industries. It changed everything for the better. The biggest advantage was that it cut down on the human error. There are times where I will have a string of dimensions to add or subtract. One of the features which aids in this is the "paperless tape". It will keep a running log of the current function the user is performing much like the old adding machine tape. The calculator only got better as time went on. The addition of the trig functions was a huge bonus. Probably the only con I have is it has a limited amount of memory storage. It only has three storable memories, and sometimes, I could really use five or six depending on the formula I have to run.Overall, I am a very satisfied customer...

When I ordered this unit I didn't realize it was intended for bridge and skyscraper builders! After I got it and tried to use it for the first time I had to stop my project and go online to learn to use it properly for what I needed to do. That took a couple of head scratching hours but finally I got it. Not the fault of the calculator though, thus the 5 stars overall. There is a more basic unit that would have been just fine for my needs (building a two story workshop) and I didn't realize it. This is the TRIGONOMETRY version and like I said if you are planning on building the Golden Gate Bridge or Taj Mahol buy away. Otherwise maybe look for the simpler unit. It did help a lot with the stair risers, rafters, and trusses though but I guess in most areas they won't let you build your own trusses anymore.

Great product. Got it to take my GC license.

Third one iv bought over 20 years

This is my third calculator from Calculated Industries. Love the trig functions and the ability to do math in duel units. It has been invaluable in my construction job. Highly recommend this calculator.

easy to use

Para mí es una herramienta nueva la estoy aprendiendo a utilizar se que me va a servir mucho porque yo trabajo la carpintería en la construcción tengo poco tiempo aquí en USA.

I like the ability to have the conversion chart in the underside of the lid and the handy storage case. I live in a damp climate and proper protective cases for electronics is a must. Also I was able to place the instructions manual under the calculator inside the case.

Es un excelente producto.Lo utilizo para detallar estructura de acero.

Great product everything you need to do a great job. Thanks calculated Industries.

It does take a bit to get used to but once you figure it out it’s awesome, great for layout measurements

This calculator helps enormously with quick calculations and can be used with imperial or metric measurements.