HP 50g Software

HP 50g Calculator


Donwload the SGS COGO+ brochure highlighting the features and benefits.



SGS COGO+ is available in Lite, Standard and Professional versions. All versions will run on the HP 49g+ and HP 50g calculators while the Lite version can be installed on the HP 48gii calculators and various emulators for the HP 49g series.

The software is now free of charge with no restrictions.

Feature Comparison

Compare the features available with each version of SGS COGO+ and view a summary of the included features.


IMPORTANT: If you're planning to use the Connectivity Kit to install the software on your HP 50g with the USB cable; please read this document for setup instructions:


COGOlt48.zip and COGOlt50.zip each include the three library files (L930.HP, L931.HP and L932.HP) necessary to install and run COGO+ Lt. The files for the 48gii are designed for the smaller screen, otherwise the programs for the 48gii and 50g are nearly identical.


COGOpro.zip includes all necessary files to install and run COGO+ Pro.

Download the Release Notes.

Installation Steps

  1. Download the appropriate program files from the Downloads section.
  2. Install the software on your calculator or emulator following the instructions available from the Documentation section.
  3. Run the software and enjoy.

NOTE: The software is now totally free of charge, no activation code required.


Customer reviews of the SGS COGO+ software.

“This software is excellent. I have been a user of various HP-based cogo programs (TDS, SMI, etc.) for over 25 years, and this is better than all of them. I have had COGO+ since version 2.12.
Where else can you communicate directly with the developer, who obviously has a passion for the product, as evidenced by the regular upgrades.
The software is robust and full-featured (I especially appreciate the "complex" bearing/distance entry, which allows for multiple arithmetic operations to be performed simultaneously with coordinate input). The leveling program is also excellent.
The combination of features, support/upgrades, and price is untouched anywhere else.”

David White

Professional Surveyor Michigan, USA

“COGO+ was an invaluable tool during my time as a geomatics engineering student. Simply put, it made learning intuitive and fun. The continuous improvement and development of the program offers future potential. I highly recommend it to anyone pursuing a surveying career whether student or professional.”

Mark Miller

Surveyor Alberta, Canada

“For many years I have been using COGO+ and I can asseverate that, it really has done my work easier, so it saves me a lot of time when I do my calculations.
The interface to enter the data and visualize the results is excellent, and among many other fundamental options that it has, it allows import and export data to a PC. Also to create files to be viewed in both AutoCAD and Google Earth.
No doubt this software is highly recommended.”

Javier Larez

Surveyor Venezuela

“I’ve been using various surveying programs in Hewlett Packard calculators for nearly 30 years. In that time I have never been quite satisfied, there always seemed to be something missing…something that didn't seem quite right...
Then along came the HP50G and COGO+.
COGO+ is an excellent program that offers what you need via a very intuitive, menu-driven interface. It’s all there...traverse, inverse, intersections...the area function can even plot the figure and then export to a dxf file so you can import it into your CADD software!
The data manipulation is a breeze, too. You can import/export coordinates and point descriptions and go back and forth with your desktop using an SD card. Say you have 200 points in your CADD/geometry software you want to stake in the field... just dump the coordinates into a text file, put the data in the proper format, stick the file on an SD card and suck it right into COGO+. Simple is good is simple.
Jacob’s software is, in my opinion, the best we have. I wish he was older and had written it for the HP48 years ago!!”

Gerald Smith

PLS Florida, USA

“COGO+ is amazing as I have been used various calculators software (Casio, Psion organizer, etc.) for more than 24 years extensive experience on field and land surveyors management, and the COGO+ since its early version approve to be the best one for both site and office work as the interface user friendly and running step by step to guide you for the perfect solutions moreover the developer (Mr. Jacob Wall) very active and to help any user immediately without delay as far I deal with him since 2011 and he can accept any valuable idea for developing the software, congratulation Jacob for the continuous successes.”

Younis Qrinawi

Section Engineer Oman