Have a look at all the features

send tape calculator calculation by emailIf you are working with your tape calculator on a daily basis, you'll
often might like to share your calculation with a colleague or
costumer. Running a conventional desktop adding machine you might scan or copy your tape to get this done.

A single click and you can archive the same, when using Deskcalc. DC sends an email with the tape and an additional graphic file to your colleagues or costumers.

Some of our costumers use this feature to automatically archive all tapes in a document management system.

position counter tape calculator

While DeskCalc prints an item counter in the text column of the result of an calculation, it is often very helpful if we can see the actual position while we are typing our calculations. That is the reason, why we added an optional position column to the tape. You may enable this column with the "Show position counter column" as shown in the picture to the right.

This position counter is optionaly also available for printing, but this will be part of the "printing" blog post, that will follow pretty soon.


windows calculator


DeskCalc has at least three different ways of showing the actual calculation result, two are know from V4.x these are 1) and 2) but the 3) option is new to V5.x

1) Set the always on top featur, see the options icon

2) Press CTRL + SPACE and you'll get a small window on the upper corner of the screen. While this is great, becausey ou can even calculate with this small window, without showing the main DeskCalc window, it is not free moveable and relatively large.

3) This is the small popup window shown in the picture on the right. It is free moveable, shows the actual result and has three additional buttons. From left to right these are: Copy to clipboard, Show Deskcalc and "Close popup" window.

multiple tapes adding machine

Have you ever wished to do two calculations at the same time with your conventional adding machine? I suppose that has happened more than once, maybe all the time.

You can use auxiliary tapes to organize, and work simultaneously with, several separate but related calculations.

With DeskCalc these days are gone. You can create up to 10 tapes at the same time. An auxiliary tape has all of the same capabilities as the main tape. Press the TAB key to switch from one to the other, or SHIFT+TAB for to opposite direction.

This article compares mechanical adding machine with software calculators. I definitly recommend it for all of you adding machine users, who are not sure if a software calculator is the way to go, especially in finanical terms.


"In my opinion, mechanical paper tape adding machines are a costly, outdated addiction. Migrating the adding machine functionality to electronic adding machine software, like DeskCalc, makes excellent business sense both from cost and environmental perspectives. I think it's time the mechanical paper tape dinosaurs faded into the same sunset where pencil and paper spreadsheets disappeared almost 30 years ago."

The mechanical paper tape adding machines setting on corporate desks next to high priced personal computers are not normally thought of as an inordinate expense. In fact, it is my experience that those mechanical machines are considered by companies to be a necessity. Nothing, in my opinion, could be further from the truth on either count. Those antiquated, mechanical dinosaurs can actually be a very expensive and unnecessary addiction to which there is an inexpensive alternative.




My hypothesis is that mechanical paper tape adding machines, or printing calculators, are no longer viable office equipment when they are sitting next to personal computers. Pencil and paper spreadsheets pretty much disappeared shortly after the advent of the personal computer. This migration of spreadsheets to software was seen as a very sensible move since electronic spreadsheets provided much more functionality in a very easy to use format.


A similar migration, in my opinion, is long overdue for mechanical paper tape adding machines. With the availability of feature rich adding machine programs like Deskcalc, it no longer makes sense to continue using the costly, feature deprived mechanical devices. The electronic adding machines, like electronic spreadsheets, offer much more functionality in a very easy to use format. Electronic tapes also contribute significantly to the bottom line when compared to antiquated printing calculators.


Analysis Factors


To test my hypothesis, I did an ROI analysis of converting to Deskcalc for United Parcel Service. Why choose Brown? Because the UPS web site displays very detailed technical information for the company. The number I needed was a count of personal computers in use at UPS. As of Sunday, August 5, 2020, the number of LAN Workstations in use at UPS was listed on their web site as 149,000. That was the starting point for my calculations.


Here are the other assumptions I needed to complete the analysis. I tried to be on the conservative side for all of these factors.


* Percent of personal computers with a printing calculator sitting beside it 30%.


* Price of paper rolls $8.48 / 12 pk.


* How often a new paper roll is installed on each printing calculator every 2 months (6 / yr).


* Price of printer cartridges $3.00 ea.


* How many printer cartridges are consumed on each printing calculator 1 / yr.


* Percent of printing calculators replaced per year 10%


The cost of purchasing mechanical paper tape adding machines for new employees is not considered in this analysis. Also not considered in the additional cost of the power required to operate the mechanical adding machines.


Annual Cost Of The Dinosaurs


For this analysis, I created an ROI analysis etape with DeskCalc. 


The tape calculates the annual expense of maintaining an estimated population of mechanical adding machines first seen on line 4. As seen in the first part of the etape (lines 1 through 33), the annual expense of maintaining the printing calculators, is, in my opinion, revealed as something much more than trivial. On line 33 you can see that the annual price tag for keeping all those mechanical tape adding machines on desks next to personal computers is just over $500,000.


The next question is what would happen if those antiquated dinosaurs were replaced with a full featured adding machine program like DeskCalc? The remainder of the ROI analysis etape answers that question.


Cost Of Converting To DeskCalc


On lines 35 through 50 of the etape a quote is calculated for a site license for DeskCalc. I based this calculation on my 60-40 Plan which is available to large corporate customers. Under this plan, the price is based on 60% of the personal computer population being licensed. A 40% discount is applied. The site license is then issued for 100% of the PC population being considered.


For this analysis,  assuming that UPS would want a site license only for those personal computers on which a companion mechanical adding machine is being replaced with DeskCalc. Company PCs that do not have a companion printing calculator are not included in the site license.


As seen on line 48 of the ROI etape, converting to electronic tapes with DeskCalc has a very attractive, one time price tag of just under $100,000. The ROI period works out to about 2-3 months. This analysis illustrates that the savings to be realized from converting to DeskCalc can be substantial. Remember, these numbers are based on conservative analysis factors. The actual savings could be much more. These annual amounts fall straight to the bottom line.


* Savings first year $400,000.


* Minimum savings each year thereafter $500,000.


In addition to these dollar savings, there are also environmental benefits. Not buying paper tape and ribbons in cardboard packaging means less pressure on our forests. And not throwing out broken machines and exhausted ribbon cartridges means fewer non-degradable plastics going into our landfills.


Do Your Own Analysis


These potentially large savings, plus the environmental benefits of converting from mechanical paper tape adding machines to DeskCalc are available to any large corporation. To find out what kind of savings your company can realize, download the DeskCalc ROI analysis etape (link provided below) and plug in your own values on the below tape lines. (The 60-40 Plan assumes a PC population of at least several hundred. There is a different discount schedule for smaller populations.)


2 Total PC Population


3 Percent of your PCs with printing calculators sitting beside them


7 Price you pay for each paper roll 12 pack


13 Average number of paper rolls consumed by each calculator each year


19 Average number of ribbon cartridges installed in each calculator each year


20 Price you pay for each printer cartridge


25 Estimate of the percent of your calculators that are replaced each year


26 Estimated cost you pay for new printing calculators


When any of the above values are changed on the etape, the entire etape is recalculated. The lines on the etape that are highlighted in blue and green (when the etape is opened in DeskCalc) are Master/Derived Values. These lines are linked such that updated subtotals cascade to following sections on the etape.


(If you do not have a copy of DeskCalc, download a copy from this web site. You can use the program free in evaluation mode for 30 days.)




In my opinion, mechanical paper tape adding machines are a costly, outdated addiction. Migrating the adding machine functionality to electronic adding machine software, like DeskCalc, makes excellent business sense both from cost and environmental perspectives. I think it's time the mechanical paper tape dinosaurs faded into the same sunset where pencil and paper spreadsheets disappeared almost 30 years ago.

Texts - Adding Machine

The text-field is a column within the tape (not in the formula mode). To each individual computation position a describing text can be added.  The fast detection of corresponding texts can be done with [ F2]-Key activated in the text registration mode, and that text is selected and closed with ENTER. Subsequently, the detection of the next value, results etc. takes place. 



You may have several calculation in your tape and like to know the average value or the grant total of all your results. You may either use the keyboard shortcuts for grand total and for average value or the A or GT button...