Monroe Systems for Business

Monroe UltimateX 12-Digit Programmable Heavy-Duty Accounting Printing Calculator With Edit & Reprint Capabilities

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  • Top View of Monroe UltimateX Black Print Calculator/Adding Machine
  • Side view of Monroe UltimateX Black Print Calculator/Adding Machine
  • Side view 2 of Monroe UltimateX Black Print Calculator/Adding Machine


Monroe UltimateX Heavy-Duty 12-Digit Programmable Accounting Printing Calculator

Our engineers at Monroe worked tirelessly to develop the best available printing calculator on the market. The Monroe UltimateX combines all of the favorite features from previous Monroe models and is the top-of-the-line 12-digit print/display heavy-duty calculator. As a result, the Monroe UltimateX is the preferred printing calculator by accountants. The Monroe UltimateX 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

  • Velvet touch keys with individual key switch technology - our keys have a more responsive touch than any other printing calculator brand. You will feel the difference!
  • Ability to edit and reprint the audit trail paper tapes for up to 99 entry lines
  • Print speed of 5 lines per second
  • Select running subtotal or grand total on your display
  • Enclosed paper roll to protect from dust build up (read our blog on the enclosed paper roll)
  • Red LED indicator to make users aware of an active calculation that has not been totaled yet
  • When you press the total key, the total will automatically print and advance above the tear-off knife so you do not need to worry about advancing the paper roll manually. We even provide the option to turn this feature off to reduce paper management and save paper.
  • Hidden storage compartment for a spare paper roll and a twin-spooled ribbon to reduce downtime retrieving supplies
  • (2) 4-key independent memories that will allow users to simultaneously run multiple calculations, all while having the ability to store their respective tax rates
  • Independent operation of multiplication and division, which enables users to multiply and divide without interfering with their addition and subtraction totals.
  • Inspired by two of our most popular calculator models ever - The Monroe Pro and the Monroe Classic

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

Monroe Ultimate calculator overview with demonstration for CPAs:

WHAT THE EXPERTS SAY: Joe Spurka, Vice President of Operations at Monroe on the UltimateX:  


1. What are some of the common jobs that customers use the UltimateX for?
The UltimateX is the top of the line of our heavy-duty calculators. It is used in supermarkets, casinos and all accounting-type settings. Executives love this model as it is the best available printing calculator available. 

2. What's something people should know about the UltimateX? Why should they choose this Monroe printing calculator over another machine?
The UltimateX is equipped with Individual Keyswitch Technology (IKT), which enables the lightest key touch available, and is a favorite among touch operators. The UltimateX also has editing and reprint capabilities.  

3. What’s some positive feedback you have heard from customers about the UltimateX?
Users love the key touch of the UltimateX, and the reprint feature eliminates the need to use more expensive, 2-ply paper. Simply pressing the reprint button will print an exact copy of your last set of calculations.

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Warranty Information

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

Desktop print/display
12-digit print/display
15.30 x 9.50 x 3.70 in
4.08 LBS
5.0 lines per second
Fluorescent, green
Black/red ribbon cartridge or spools
Individual Keyswitch Technology (IKT)
=, F, 0, 1, 2, 3, 4, 6
Yes, print entered reference number or date
Two (2) 4-Key Independent
115Volts 0.2Amps 60HZ
Truncate, 5/4 Round Off, Round Up
Yes, automatic
Yes, with %+ and %- capability
Yes, (6) with %+ and %- capability
Yes, group and grand total
Yes, intelligent item count, automatic averaging
Yes, computes amount and % of change
Yes, computes cost, sell, and margin
Yes, entry followed by divide then equals
Yes, changes the sign of an entered amount
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12 Reviews

  • 5
    Ultimate X

    Posted by Monroe Customer on Mar 03, 2022

    Got one for my home office, then bought another for my work office. Best calculator I've used since my 25 year old Monroe died 6 months ago. Much better than the 8130 that I had at work.

  • 5

    Posted by Margaret Roll-Peters on Feb 17, 2021

    Monroe makes the best calculators! They last a long time and are very easy to use.

  • 5
    Monroe Ultimatex 12 digit calculator

    Posted by Ronald Walton on Dec 31, 2020

    works quickly, keys are large and the plus and total are easy to hit to go fast.

  • 5
    Monroe UltimateX

    Posted by Jack on Dec 11, 2020

    I have used Monroe calculators for over 40 years! I am not disappointed in the least with the UltimateX. It very ably continues the tradition of outstanding excellence and value!

  • 5
    Monroe UltimateX

    Posted by Beverly on Oct 26, 2020

    The best calculator for accountant types!

  • 5
    The BEST

    Posted by Jonathan on Jul 08, 2020

    I recently upgraded from my Monroe Classic printing calculator and I've been extremely impressed by my new UltimateX. Thanks for adding the ability to edit entries.

  • 5
    One happy 10 key user

    Posted by Jon on May 28, 2020

    I love everything about this calculator

  • 5
    Best printing calculator out there

    Posted by Carla on May 21, 2020

    Thank you for the edit and reprint buttons, you save me lots of time. This is a quality model

  • 5
    We love our Monroe UltimateX!

    Posted by Stephanie on Sep 06, 2019

    This has been the best calculator I have ever purchased in my life. My office thinks it’s incredible.

  • 5
    This is an amazing calculator

    Posted by Jon on Aug 03, 2019

    I cannot believe how great this works. One of my colleagues raves about this, so when my Sharp calculator died I figured I would try this brand. Coming from using a Sharp calculator I had to adjust to the total key being on the other side, which only took about a day. The functions on this are far more advanced than I expected. I love love love the edit feature! And they even thought of a storage compartment for an extra paper roll! I’m impressed and happy that I switched to this.

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