Why Calculators Still Sell in the Age of AI and Smartphones — Premium Model Sold Out in Six Weeks

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The story

Even now, when it’s normal to calculate on a smartphone and use Excel or generative AI at work, Casio’s worldwide calculator shipments have stayed roughly flat over the past five years. A premium calculator the company released this April for ¥99,000 (tax included) sold out its domestic stock in about six weeks. On 5ch’s News Express+ board, this article sparked a wave of comments on “why calculators still sell today,” with posters divided over the different calculation logic used by smartphones versus calculators, and over how calculators, abacuses, and scientific calculators each still have their place.

Everyday math on your smartphone, Excel or generative AI at work—

With digital devices everywhere these days, it’s easy to assume the single-purpose “calculator” is nearing the end of its usefulness. And yet at industry leader Casio, worldwide shipment volumes haven’t dropped significantly at all over the past five years.

In fact, an unusually high-end calculator the company launched this April at ¥99,000 (tax included) sold out its domestic allotment in about six weeks. At a time when high-performance devices are within everyone’s reach, why do calculators keep selling? We asked a Casio representative.

Source: news.yahoo.co.jp / Original article here

What people said

12AnonymousOct 21, 2026 18:26
AI will mess up even basic arithmetic with positive numbers if you're not careful.
142AnonymousOct 21, 2026 19:09
Re: #12
Exactly. I had AI double-check some calculations once and it made quite a few mistakes lol. Would've been way more efficient to just have it write a one-off program instead.
17AnonymousOct 21, 2026 18:29
The abacus isn't going down without a fight either.
30AnonymousOct 21, 2026 18:32
Re: #17
Honestly, the abacus isn't really practical unless you've gotten good enough to do it entirely in your head lol.
64AnonymousOct 21, 2026 18:43
Re: #30
These days it's America that's into abacus training. Meanwhile in Japan you've got working adults who are shaky even on their times tables. No way we're beating India or China.
25AnonymousOct 21, 2026 18:32
Honestly, physical buttons are better than touchscreens for car dashboard controls too.
193AnonymousOct 21, 2026 19:29
Re: #25
True that. A rotary dial for temperature is about the easiest to use. Nowadays it's all just for looks.
36AnonymousOct 21, 2026 18:34
I still use a scientific calculator.
55AnonymousOct 21, 2026 18:39
Re: #36
My high school used pocket computers instead of scientific calculators. Pocket computers are handy.
69AnonymousOct 21, 2026 18:45
Re: #55
It's Micom Detective (a retro "microcomputer detective" tokusatsu parody character)
49AnonymousOct 21, 2026 18:37
Why do pawnshops punch numbers into a calculator and show it to the customer when buying stuff?
53AnonymousOct 21, 2026 18:38
Re: #49
Because it looks cool.
67AnonymousOct 21, 2026 18:45
Re: #49
By not showing the customer the calculation process and only revealing the final purchase price, it creates an atmosphere that makes them want to sell.
57AnonymousOct 21, 2026 18:40
People who use a calculator even though Excel is right there—
just throw your PC away already.
201AnonymousOct 21, 2026 19:31
Re: #57
Sometimes things just aren't entered in the spreadsheet yet, and going the extra mile like that shows you actually know the job.
68AnonymousOct 21, 2026 18:45
On a smartphone, 20-10÷2 comes out to 15 unless you hit equals along the way
On a calculator it comes out to 10 even without adding parentheses.
79AnonymousOct 21, 2026 18:47
Re: #68
Because it calculates following standard order of operations, it's really awkward for accounting-style work.
94AnonymousOct 21, 2026 18:52
Re: #68
What on earth are you even talking about?
71AnonymousOct 21, 2026 18:46
Saw a construction worker on break yesterday using what looked like a flip phone (garake)
Flip phones themselves can't actually be used anymore though, right?
So does that mean it was one of those "feature phones"?
118AnonymousOct 21, 2026 19:01
Re: #71
Must be a 4G feature phone!
I run a UQ Mobile Android smartphone plus a 4G feature phone with an Ahamo SIM in it
Putting an Ahamo SIM in a 4G feature phone isn't really standard, so I'm thinking about porting my number (MNP)
Maybe to povo or Japan Communications SIM
82AnonymousOct 21, 2026 18:48
I don't really get the point of the abacus
Isn't it faster to just write the calculation on paper than to think "add 1, so move one bead up; subtract 1, so move one bead down"?
83AnonymousOct 21, 2026 18:49
Re: #82
You're seriously underestimating the abacus.
85AnonymousOct 21, 2026 18:49
PC keyboards haven't gone obsolete at all either.
89AnonymousOct 21, 2026 18:50
Re: #85
There's no real substitute for a keyboard
And personally I'm the type who uses a mouse even with a laptop
86AnonymousOct 21, 2026 18:49
I work in finance so I use an adding-list style calculator
Once you're used to it, you can't go back.
95AnonymousOct 21, 2026 18:52
Re: #86
Those are rare these days
A smartphone calculator is basically a stripped-down scientific calculator doing basic arithmetic, so it's useless for financial accounting
87AnonymousOct 21, 2026 18:50
In the time it takes just to launch the app
you could've already clack-clacked through it on a real one
An abacus would do fine too
91AnonymousOct 21, 2026 18:51
Re: #87
The calculator app I use takes less than a second to open though.
98AnonymousOct 21, 2026 18:54
Re: #1
Not judging things with your own head, and leaving even the judgment itself to AI — that's the domestication of humanity.
100AnonymousOct 21, 2026 18:55
Re: #98
Looking at the thread title, how exactly did you connect this to AI?
102AnonymousOct 21, 2026 18:56
I want at least 12 digits, minimum.
107AnonymousOct 21, 2026 18:58
Re: #102
With a Windows calculator app you can go as many digits as you like
You can just use the numpad directly so it's no different from a real calculator
And you can make the display text as big as you want too
132AnonymousOct 21, 2026 19:06
Re: #107
The numpad's on the right side — don't tell me you type on a calculator with your right hand?
106AnonymousOct 21, 2026 18:58
Re: #100
"Is the 'Calculator' Still Necessary in the Age of AI and Smartphones?"

A calculator is a tool for making judgments with your own head, you know?

Not thinking and judging with your own head, and leaving even the judgment to AI — that's the domestication of humanity.
115AnonymousOct 21, 2026 18:59
Re: #106
If you looked at the thread title and still can't see how this has nothing to do with AI, that's an issue that comes before you even start using AI.
155AnonymousOct 21, 2026 19:14
3+5*10

On a calculator: 80
On a smartphone: 53
159AnonymousOct 21, 2026 19:16
Re: #155
53 is the correct answer though.
162AnonymousOct 21, 2026 19:17
Re: #155
As you can tell from how a smartphone calculator displays the whole expression you typed at the top
it evaluates the entire formula at once

A calculator, on the other hand, computes each number and symbol sequentially as you enter them
170AnonymousOct 21, 2026 19:22
A dedicated device is fast.
182AnonymousOct 21, 2026 19:25
Re: #170
That's exactly the point — do you even need speed for this kind of calculation?
What are you even calculating in the first place?

Background and Key Points of This Topic

Standard calculators use an “immediate execution” method that computes each symbol as it’s entered, while smartphone calculator apps are designed to parse the entire expression and respect operator precedence (processing multiplication and division first). The “3+5×10” example that came up in the thread — 80 on a calculator versus 53 on a smartphone — comes down to this difference; neither one is malfunctioning. This calculator behavior has historical roots in matching the entry-order calculations used at cash registers and in bookkeeping, giving it a practical use distinct from scientific calculators or Excel. The thread split between the view that “dedicated devices are unnecessary in the age of AI and smartphones” and the view that “calculators offer a usability accounting work can’t get anywhere else,” with a side debate also breaking out over the merits of learning the abacus.

*This article is composed of excerpts and a summary from the 5ch (News Express+) thread “Is the “Calculator” Still Necessary in the Age of AI and Smartphones? Amid Fears of “Sales Halved”… Shipments Stay Nearly Flat, Why “Dedicated Devices” Still Win Out in a Multitasking Era.”

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