Monroe Systems for Business

Monroe 8145X 14-Digit Dual-Memory Heavy-Duty Accounting Printing Calculator

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  • Top view of Monroe 8145X Black Printer Calculator/Adding Machine
  • Front view of Monroe 8145X Black Printer Calculator/Adding Machine
  • Side view of Monroe 8145X Black Printer Calculator/Adding Machine
  • Side view 2 of Monroe 8145X Black Printer Calculator/Adding Machine


Monroe 8145X, Our 14-Digit Heavy-Duty Printing Calculator

Monroe continues to raise the bar for heavy-duty desktop calculators with the Monroe 8145X two-color printing calculator. Accountants at Fortune 500 companies prefer the Monroe 8145X because of its superior functionality and 14-digit capacity. This model is most commonly purchased by users that require multiple math columns to be run and are responsible for managing billion+ dollar budgets for projects or purchases. The Monroe 8145X features our newly updated printer which, for the first time in Monroe history, is compatible with supplies such as the Monroe M33X ribbon cartridges, Monroe P65M ribbon spools and our signature 15 lb. or 20 lb. paper rolls. Using our high-quality Monroe supplies will provide you with the optimal print quality.

Key Features

  • Two (2) independent memories and the ability to print and display 14-digits
  • Print speed of 5 lines per second and has a smooth key touch
  • Enclosed paper roll to protect from dust build up (read our blog on the enclosed paper roll)
  • Indicator lamp (making users aware of an active calculation)
  • Automatic total print above tear-off knife
  • Hidden storage compartment for a spare paper roll and a twin-spooled ribbon to reduce downtime
  • (2) 4-key independent memories that will allow users to simultaneously run multiple math problems, all while having the ability to store their respective tax rates.
  • Independent operation of multiplication and division capability, enabling the user to multiply and divide during addition and subtraction.

Those who know, choose Monroe.


Click here to view the product manual.

Recommended Supplies and Accessories

2 ¼” x 150′ Paper Rolls  -- Universal premium 15 lb. or 20 lb. single-ply paper rolls for calculators
Monroe M33X Ribbons -- Ribbon cartridge compatible with all Monroe X Series printing calculators
Large Elevation Wedge -- Foam wedge designed to elevate heavy-duty calculators
Calculator Supply Kit -- Starter supplies kit for Monroe calculators with ribbons & paper rolls


WHAT THE EXPERTS SAY: Jason Marsdale, Vice President of Sales & Marketing at Monroe on the 8145X:   

 Jason Marsdale, Vice President of Marketing and Sales of Monroe Systems

1. What are some of the common jobs that customers use the 8145X for?
The 8145X series calculators are very common in professions with multiple line item accounting needs, as well as very small numbers as it has the (2) independent memories and a 14-digit capacity.   

2. What's something people should know about the 8145X? Why should they choose this Monroe printing calculator over another machine?
With the 8145X you can add up to 4 different lists of numbers, totally independent from each other, at the same time. 

3. What’s some positive feedback you have heard from customers about the 8145X?
The 8145X’s 14-digit capacity and 2 independent memories allow for greater ease working with larger numbers on either side of the decimal.   

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Warranty Information

Lifetime phone support and 6-month warranty for parts & service.
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Additional Information

Calculator Type:
Desktop print/display
14-digit print/display, 28-digit calculating
Product Dimensions:
15.30 x 9.50 x 3.70 in
4.08 lbs
Print Speed:
5.0 lines per second
Display Type/Color:
Fluorescent, green
Inking System:
Black/red ribbon cartridge or spools
10 key numeric pad, 00 and decimal point
Decimal Settings:
=, F, 0, 1, 2, 3, 4, 6
Non-Add/Date Function:
Yes, print entered reference number or date
Two (2) 4-Key Independent
115 Volts - 0.2 Amps - 60HZ
Truncate, 5/4 Round Off, Round Up
Yes, automatic
Yes, with %+ and %- capability
Yes, (1) with %+ and %- capability
Grand Total:
Yes, group and grand total
Item Count:
Yes, intelligent item count, automatic averaging
Percent Change:
Yes, computes amount and % of change
Square Root:
Yes, entry followed by divide then equals
Change Sign:
Yes, changes the sign of an entered amount
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3 Reviews

  • 5
    Monroe 8145XB

    Posted by Tony Graell, MAcc , MBA on Nov 03, 2022

    I’m beyond glad I purchased 2 of these along with the top of the line parts compatible with this model. I’m also very impressed with the custom packaging made for me . So far so good . Just excellent

  • 5
    My company trusts Monroe

    Posted by Kim on Apr 25, 2019

    This is one of the many Monroe printing calculators that my company has in our office. Monroe printing calculators have been here as long as I can remember. They are superior to any other brand I have used.

  • 5
    Very happy

    Posted by Tut on Apr 01, 2019

    My company only buys Monroe because they last long and perform wonderfully. I'm very happy with my new 8145X!

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