| | | Accuracy, functionality, and dependability make this pocket-sized calculator a great tool for engineers, surveyors, college students, scientists, and medical professionals. Features include 31KB of memory, RPN and Algebraic data entry, 2-line programmable (no competitor has both of these!), a powerful two-line display, and the time-saving HP Solve application.
- Efficiently express calculation sequences without parentheses—reducing the number of keystrokes—using RPN
- Write and solve equations for any variable without rewriting the original equation (you can edit, undo, and delete) using the HP Solve application
- Program using the 31KB RAM user memory
- Get accurate calculation results with the 21-digit internal precision
- Adjust the contrast on the powerful two-line display
- Easily carry and hold; it's a handy size and has comfortable rubber side grips
| | Features |  | 100+ built-in functions | | 31KB memory | | 27 storage registers | | RPN and algebraic data entry | | 2-line, 10-character display | | Programmable | | 21-digit internal precision | | One-year limited warranty |
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| Customer Reviews |  | | Value |  4.5 | | Performance |  5 | | Ease of Use | 4.5 | | Overall Satisfaction | 4.5 |
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5 of 5 Good non-graphical calculator Thursday, April 23, 2009
A Customer from Kansas City
Simple and easy to use, purchased for the EIT, cost effective. Was this review helpful?  
5 of 5 worthy update to HP32S Monday, September 24, 2007
A Customer from Longview, WA
Excellent product for simple engineering calculations. More complex calculations, I use a computer.
It replaced a HP32S (20+ yr. old)
Simple to use, seems to be just as rugged as the 32S. Was this review helpful?
4 of 5 HP 33S Calculator Friday, July 14, 2006
Steve from Albuquerque, NM
The other reviews I've read are accurate. The shift key colors are hard to distinguish, especially in low light; the 'design statement' key layout is unnecessary and detracts from usability; good functionality; decent display and quick calculation response. Not a bad calculator, but not on par with even the 11C for feel, usability, or probably longevity. Was this review helpful?
15 of 15 customers found this review helpful.
5 of 5 A decent update to the classic HP's Thursday, September 01, 2005
lindguini from Los Angeles, CA
Strengths:
RPN, quality feel, excellent manual/case, and low price.
Weaknesses:
Display decimal point is small.
Summary:
Even though the HP 33S wasn’t developed by the famed HP Corvallis group (the ones responsible for the classic HP RPN calculators from the 70’s through the 90’s), it is still a quality machine that is worthy of consideration by diehard HP fans. I’ve been using various HP RPN calculators for over 20 years and I have been very pleased with the quality and features of the new HP 33S.
PROS:
HP smartly retained the famed RPN entry mode but also offers an algebraic entry mode depending on your preference. I recommend you learn the RPN method and never go back. However, in algebraic mode, the 33S does have very nice equation displays that are helpful visually. I’ve actually been using both modes for various tasks and enjoy switching between them as needed.
The calculator is built very well with excellent attention to detail, good crisp key clicks (similar to the older HP’s), and a solid, modern style. It is by far one of the most solid calculators available today. The faceplate is brushed metal and the case is nicely finished with tight seams. The rubber side grips are very functional. Overall, the appearance and feel of the calculator is high quality and it is pleasantly lightweight, as well. It may not have the heft of the older units like the 42S, but heavier is not always better. The 33S also includes an excellent User’s Manual (very similar to the old HP 32SII manual) and a very nice lined leather case. A remarkable value for $50 and by far the least expensive HP ever.
While many HP purists have criticized the chevron key pattern and the ENTER key placed at the bottom of the numeric pad, I’ve found that after a few minutes working with the new layout it is totally practical and usable. I think the chevron layout is just as easy to use as the straight key rows found in previous HPs. Also, while some purist HP users don’t like the position of the ENTER key, I say “get over it” and realize that the new position allows quicker access to the numeric/operand keypad area since your hand doesn’t have to pass over (and hence cover) the keypad to hit ENTER during RPN calculations. I think both old and new HP layouts are effective with use and familiarity.
CONS:
The two-line LCD display is large and readable except for unusually small decimal points and commas. I know that the first version of the 33S (sold during 2003 through early 2005) had even smaller decimals/commas and this was a big complaint amongst users. Now, to HP’s credit, they did finally revise the display in early 2005; however, even in my second-generation 33S the decimal point is still pretty puny when sandwiched between 2’s (as in 2.2). That is really the only negative I can think of.
OVERALL:
This calculator is a good effort by HP to retain some market share for RPN machines. Hopefully, this is not the last of them we’ll see from HP but only time will tell. The bottom line is that with the proliferation of sophisticated PC’s, PDA’s, and software, the handheld calculator has been mostly delegated to the classrooms of high school and college. Hence, the demand for inexpensive calculators for students (like this 33S). However, any serious scientist or engineer (such as myself) always keeps a trusty calculator close-at-hand for quick work in the office or field. This 33S is a decent modernization of the classic (and much more expensive) calculators that made HP famous.
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