Monroe Systems for Business

Monroe 122PDX 12-Digit Medium-Duty Accounting Printing Calculator With Fast Printing

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  • Monroe 122PDX 12-Digit Medium-Duty Accounting Printing Calculator With Fast Printing (122PDX)
  • Monroe 122PDX 12-Digit Medium-Duty Accounting Printing Calculator With Fast Printing (122PDX) (Right)
  • Monroe 122PDX 12-Digit Medium-Duty Accounting Printing Calculator With Fast Printing (122PDX) (Left)
  • Monroe 122PDX 12-Digit Medium-Duty Accounting Printing Calculator With Fast Printing (122PDX) (Back)
  • Back side view of Monroe 122PDX Ivory Printer Calculator/Adding Machine



Monroe 122PDX Medium-Duty Calculator

Introducing the Monroe 122PDX Medium-Duty Accounting Printing Calculator, a top-of-the-line medium-duty calculator designed to outperform all competing models. This model is known for its dependability, making it a favorite among banks and credit unions. The Monroe 122PDX features a large 12-digit display and a professional-sized keyboard with oversized plus/minus keys, ensuring a seamless user experience.

The Monroe 122PDX 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.

The Monroe 122PDX Medium-Duty Accounting Printing Calculator is a reliable and efficient tool that is designed to meet the needs of professionals in any industry.

Key Features

  • Print speed of 4.3 lines per second
  • Large 12-digit display with 12.5mm digit height
  • Equipped with a 4-key independent memory
  • Non-add/date function allows you to print a reference number or date
  • Standard 5/4 rounding, round up, or truncate options
  • 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
  • Item count feature allows you to confirm the number of entries in each calculation
  • An input buffer allows users to make entries even while printing previous lines of figures
  • A two-key rollover feature lets you work quickly while ensuring every keystroke is recorded

Those who know, choose Monroe.

What's In The Box?
Monroe 122PDX Medium-Duty Printing Calculator Monroe M33X Ink Ribbon Bond Paper Calculator Tape Monroe Medium-Duty X-Series Calculator Cover Calculator Paper Roll Holder Monroe 122PDX User Manual
Monroe 122PDX Medium-Duty Printing Calculator Pre-Installed Monroe Ink Ribbon
Click Here to get our M33X Ink Ribbon.
Starter Paper Roll
Click Here to get our AR12225 20lb. Bond Paper.
Monroe Medium-Duty X-Series Calculator Dust Cover Calculator Paper Roll Holder Monroe 122PDX User Manual


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

Medium Elevation Wedge -- Foam wedge designed to elevate medium-duty calculators

Calculator Supply Kit -- Starter supplies kit for Monroe calculators with ribbons & paper rolls

WHAT THE EXPERTS SAY: Jon Gregull, Marketing Manager at Monroe on the 122PDX:

Jon Gregull

1. What are some of the common jobs that customers use the 122PDX for?

Our 122PDX is popular with our customers who perform a good amount of accounting-style work, but are also very limited on desk space.

2. What's something people should know about the 122PDX? Why should they choose this Monroe calculator over another machine?

The 122PDX is our fastest printing and most simple, functionality-wise, medium-duty machine on the market today.

3. What's some positive feedback you have heard from customers about the 122PDX?

Customers like the 4.3 lines per second print speed, wider Plus and Minus keys, and simplistic functionality of the 122PDX and how these features allow for a more efficient and less complicated calculator experience.


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Warranty Information

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

12-digit print/display
Product Dimensions:
11.00 x 8.00 x 2.77 in
Print Speed:
4.3 lines per second
Decimal Settings:
+, F, 0, 1, 2, 3, 4
One (1) 4-Key Independent
Calculator Type:
Desktop print/display
4.50 lbs
Display Type/Color:
Florescent, green
Inking System:
Black/red ribbon cartridge or spools
10 key numeric pad, 00 and decimal point
Non-Add/Date Function:
Yes, print entered reference number or date
115Volts 0.2Amps 60HZ
Truncate, 5/4 Round Off, Round Up
Yes, automatic
Yes, with %+ and %- capability
Grand Total:
Item Count:
Yes, intelligent item count, automatic averaging
Square Root:
Change Sign:
Yes, changes the sign of an entered amount
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5 Reviews

  • 5
    Monroe 122PDX

    Posted by Robert Puffer on Aug 25, 2023

    I had almost forgotten how nice it is to work with a quality calculator. This Monroe, fits on the desk nicely, is very quiet and just works as it should. If you do not need a calcultor to haul around all day I would very much recommend this one.

  • 5

    Posted by Fred Kowell on Mar 11, 2021

    Nothing better.

  • 4

    Posted by Joyce Jones on Jan 28, 2021

    I have just recently received my machine. But while setting up and playing around with it, it appears to be exactly what I want.

  • 5
    It's great.

    Posted by Maria on Aug 03, 2020

    I couldn't balance my checking account without it.

  • 5

    Posted by Lita on Mar 15, 2019

    Love my new calculator. You can see the totals on the paper tape and the display seems larger and easier to read.

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