Casio calculator

Long-term owners

still have my trusty Casio that I bought over 20 years ago

Jun 2026 · comment

What hackers pick instead

• HP 15COwners praise its tactile keys, battery life and durability, with a median of 41 years of use. Critics say the reissues don't match the original's keys, display or labeling.24recommend
• Casio S100X Japanese Lacquer EditionPeople recommend it for its handcrafted lacquer look and premium feel as a keepsake, though critics say it is an average calculator for the price.16recommend
• SwissMicros DM42nPeople recommend it as a stack-based RPN calculator that feels good to use and is built to last. The most common caveat is small keys.13recommend
• SwissMicros R47 RPN calculatorRecommended as a physical RPN calculator with high-end build, screen and instant on/off, and engineering people praise. Critics call it backward-looking and too expensive.11recommend
• HP 42S calculatorOwners recommend the HP 42S for its satisfying tactile buttons and long life, with many reporting decades of reliable use. Battery replacement is the common caveat.8recommend

Every quote

The 15 most detailed of 17 comments. Each links to the original.

1. A friend in high school bucked the trend and used a casio in our TI based education, and did just fine for himself

   Mixed · May 2026 · in “Ti-84 Evo”

2. Powerful enough to write formulas and complex calculations, but can't store formulas or programs.

   Recommends · Jul 2026 · in “The Zilog Z80 has turned 50”

3. I'm using to do simple calculations, including checking Claude code/opus math and logic.

   Recommends · Feb 2026 · in “Ask HN: Do you still physical calculators?”

4. I still have my casio calculator from college and that's what I use

   Recommends · Jun 2026 · in “Apple increases MacBook and iPad prices by 20%”

5. it was just the right amount of functionality to help me with math

   Recommends · May 2026 · in “Ti-84 Evo”

6. Casio was definitely more friendly and polished in UI, but dumber

   Mixed · May 2026 · in “Ti-84 Evo”

7. It got me all the way through my exams in school and university.

   Recommends · May 2026 · in “Ti-84 Evo”

8. still have my trusty Casio that I bought over 20 years ago

   Recommends · Jun 2026 · in “HP re-releases classic computer science calculator: The HP-16C”

9. I used this to double check my answers in my exams.

   Recommends · May 2026 · in “Ti-84 Evo”

10. way cheaper than the equivalent TI

    Recommends · May 2026 · in “Ti-84 Evo”

11. Look what you can get for $20

    Recommends · May 2026 · in “Ti-84 Evo”

12. Display was nice, functionality sucked.

    Criticizes · May 2026 · in “Ti-84 Evo”

13. Not just calculator, but for any tool, I try to avoid using my phone.

    Recommends · Jan 2026 · in “Ask HN: Do you still physical calculators?”

14. tactile buttons and years' of muscle memory

    Recommends · Feb 2026 · in “Ask HN: Do you still physical calculators?”

15. Definitely better than the Cassio scientific calculator my math teacher had us use.

    Criticizes · Nov 2025 · in “GHC now runs in the browser”