The Casio HR-100TM is a solid machine — right up to the morning the ink roller fades, the roll runs out mid-total, or it simply stops. Here is how to keep working exactly the same way on the PC — key for key — and what it saves you in paper and ink roller every year.
Windows 10, 11 and Server · 10 MB · no account needed
Everything carries over, key for key
The tape, blind touch typing, the key sound, Grand Total, the memory and the tax key — they all work the way they do on the Casio HR-100TM. The full switch guide shows every key and where it lands in DeskCalc, what stays the same, and what a paper tape simply cannot do.
Read the full switch guideWhat the Casio HR-100TM costs you every year
A machine on the desk does not feel like a running cost, because it is paid in small amounts. Here is the same calculation our ROI sheet uses, with this model’s own supplies.
| Item | Assumption | Per year |
|---|---|---|
| Paper rolls (2¼″) | 6 rolls at $0.99 | $5.94 |
| Ink roller (Casio IR-40T) | one per year | $3.00 |
| Electricity | 9 W, 8 h/day, 5 days, 48 weeks — 17.28 kWh at $0.15 | $2.59 |
| Running costs | $11.53 | |
| Plus the machine itself | spread over 8 years | $131.00 |
| Total over 8 years | $223.24 |
Running costs are rounded to the cent; the eight-year total is calculated from the unrounded figures.
Against one DeskCalc licence
| Workplaces | DeskCalc | Machines | You keep |
|---|---|---|---|
| 1 | $29.95 | $223.24 | $193.29 |
| 5 | $119.95 | $1,116.20 | $996.25 |
| 10 | $199.95 | $2,232.40 | $2,032.45 |
Figures from our ROI sheet. Change the assumptions to your own numbers: Open the ROI calculator
Give your Casio HR-100TM a proper send-off
Switch to DeskCalc, send a photo of your old Casio HR-100TM, and we refund 40% of your purchase straight to your PayPal — and your machine earns its place on the Wall of Retired Machines.
See the wall & get 40% backQuestions about replacing the Casio HR-100TM
Can DeskCalc really replace a Casio HR-100TM?
Yes. DeskCalc is a Windows program that works the way the Casio HR-100TM does — a running tape you read as you type, blind touch-typing on the numeric keypad, Grand Total, the memory keys and a sales-tax key. Everything carries over key for key; what goes away is the printing, the supplies and the wear. The full switch guide shows where every key lands.
Do I still have to buy the Ink roller (Casio IR-40T) and paper rolls?
No. DeskCalc’s tape is on the screen, not on paper, so there is no ink roller (Casio IR-40T) and no paper roll to replace — ever. That recurring cost, about $11.53 a year to keep a Casio HR-100TM running, is exactly what the switch removes.
Which keys are different from the Casio HR-100TM?
Almost none. +, −, ×, ÷, %, Grand Total, item count and the memory keys all map straight across. The one thing DeskCalc has no dedicated key for is Cost / Sell / Margin — and you won’t miss it: a markup is one labelled line on the tape (cost × 1.30), a margin is cost ÷ 0.80.
Does DeskCalc need an account or an internet connection?
No. It runs entirely on your PC — no account, no cloud, no connection — and what you calculate stays on your computer. It installs on Windows 10, 11 and Server and is a 10 MB download.
Can I get the tape into Word or Excel?
Yes. Copy the tape and paste it into Word, Excel or a PDF — with the columns, the labels and the negative amounts in red. That is the part a paper strip from the Casio HR-100TM could never do.
Can I try it before I give up the Casio HR-100TM?
Yes. The trial runs 31 days with no limits and no account — long enough for a full month-end, the only test that matters. A single licence is $29.95.
Try it before the Casio HR-100TM dies
The trial runs 31 days with no limits and no account. That is long enough for a full month-end — which is the only test that matters.
Casio and HR-100TM are trademarks of Casio Computer Co., Ltd.. DeskCalc is not affiliated with, endorsed by or connected to Casio Computer Co., Ltd.. The name is used here only to describe which machine people switch from.