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How Accurate is Accurate Enough?
04-11-2021, 01:15 PM
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How Accurate is Accurate Enough?
When my HP-41CV refused to turn on any more, my search for a fix or replacement led me to several places, one of them being this forum. A topic I have seen is "the most accurate calculator" or other similar themes, with 10, 12, 14, or even more digits accuracy. It makes me ask, how accurate is accurate enough?

I have worked my entire career as a chemical engineer with that 41CV I got used in 1983. I have never had a situation where its ten digits did not provide orders of magnitude better accuracy than would be meaningful. It is rare that I ever do a calculation that has more than 4 digits for all the inputs, so my calculator is always far more accurate than is needed.

Are there real-life calculations where 10, 12, 14 digits are actually required? Or is it a matter of getting more digits and accuracy because we can? Just curious.

As a side note, my searches revealed a simple way to address my 41CV, and it is working again. But that did not stop me from falling into the rabbit hole - now I also have a 35S and a DM41X.
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How Accurate is Accurate Enough? - Chumango - 04-11-2021 01:15 PM
RE: How Accurate is Accurate Enough? - ttw - 04-11-2021, 03:12 PM

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