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HP 33S Scientific Calculator (F2216A)
List Price: $50.99

Our Price: $34.96

You Save: $16.03 (31%)


Product Description

Professionals and college students have the flexibility no other scientific calculator can offer with the choice of RPN or algebraic entry-system logic. The programmable HP 33s features enhanced capabilities including single and two-variable statistics, base-n functions, a strong mathematics package, unit conversions and a powerful fraction mode. Get professional performance from the ultimate RPN scientific programmable calculator. Switch between RPN and algebraic entry-system logic at any time. The HP 33s continues to deliver with a large 2-line alphanumeric display with adjustable contrast, a robust library of built-in functions and constants. Large 2-line display with adjustable contrast to easily view entries, results, menus and prompts Simplify physics with 40 built-in physical constants, plus a complete library of unit conversions Get accurate results with edit, undo and delete capability Enjoy a compact size and comfortable rubber side grips that are designed for the mobile professional Use strong statistics functions for single and two-variable statistics, linear regression and more Use base-n functions for binary, octal, decimal and hexadecimal number calculation and conversion Power to calculate inverse functions, cube root, logarithms, exponents, factorials and more Take advantage of a powerful fraction mode plus fraction-to-decimal conversion Programmable with keystroke programming 31KB memory with 27 independent storage registers Enhanced fractions mode, statistics and mathematics packages with base-n function Compact size and rubber grips for comfort Enclosure material - Plastic, rubber side grips and brushed metal faceplate Dimensions - Length 6.2 x Width 3.2 x Depth 0.63 (15.8x8.3x1.61cm) Weight - 127 grams (4.5 ounces)

Pocket-sized and full-featured, the HP 33s Scientific Calculator is designed for engineers, surveyors, college students, scientists, and medical professionals. Its two-line display is easy to read, and at only 4.2 ounces, the unit slips easily into your pocket for travel.

Boasting both Reverse Polish Notation (RPN) and intuitive algebraic data entry modes, as well as 32 KB memory with 27 memory storage and recall functions, the 33s is ideal for solving a variety of science and engineering problems.

Functions include trigonometric, percentage, conversion, coordinate, time, angle, probability, factorial, gamma, fractions, and a variety of statistical operations. The calculator can solve equations, integrate, work with complex numbers, and is programmable. The 386-page manual thoroughly reviews the calculator's many features. When purchased new, the unit is backed by HP's one-year limited warranty.

What's in the Box
Calculator, two 3-volt lithium coin batteries (CR2032), instruction manual

  • RPN and algebraic key-in logic
  • Easy-to-read 2-line LCD
  • Sturdy rubber/plastic construction
  • 32 KB memory, 27 memory storage and recall functions
  • Automatic power off

Customer Reviews:

  • Only RPN calculator allowed when I took the PE
    If this hadn't been the only RPN calculator allowed, I wouldn't have purchased it. I agree with all of the other reviews regarding the horrible "key action." In addition, in my exerience the calculator has a much short battery life than my older HPs, a general flimsey feel, and I had no confidence in the results of my calculations (due largely to the key action). I did pass the PE exam, but my lack of confidence in the calculator (even though I bought it and used it at work for 6 months before the exam) added a lot of unnecessary stress to the experience.

    In short, don't buy this calculator unless you absolutely can't (like me) go back to using a standard, non-RPN calculator.

    HP, after you get past this whole spying on the board problem, please consider re-issuing the old HP 32sII....more info
  • If you like RPN and plan to take an engineering test, this is it
    All right, I admit it, I rarely use a calculator any more. My computer has MathCAD, spreadsheets, FEA analysis, and even RPN calculator simulation.

    Bought this to take the PE test in the fall of 2008. I chose this model because I prefer RPN. Used it frequently for about 9 months prior for both studies and work in order to be familiar with it. Passed the test and have used this only a few times since.

    The decimal/comma thing can be annoying, I guess, but I didn't find it to be a problem. You can set the display to fixed decimal or scientific and you'll always know where the decimal is.

    Keys were ergonomic with enough resistance to avoid accidental key strokes. Display was easy to read. Still using stock batteries after about 800 hours of use. I like the slim build. I loaned this to a friend unfamiliar with RPN and switched it to regular mode. No complaints.

    With the lack of features, it seems likely that this model was designed to meet test rules. If you plan to test and like RPN, this will get the job done....more info
  • Best scientific calculator available
    I have owned the 33s for two months and during this time I have become familiar with most of its capabilities. I am a physicist and I use my hp 33s almost on a daily basis.

    This calculator goes unrivaled as far as its functionality. The fact that it offers the ability to perform key-stroke programming (with features like looping and branching) alone places it a step above any other scientific calculator available in the market today, with the exception of the (much bulkier and more expensive) graphic calculators.

    The formula solver is very powerful and easy to use. The unit conversions are easy to access and the machine can perform complex arithmetic and trigonometry (i.e. functions like sin, cos, etc. have a mode to operate on complex numbers). I also like the physical constants menu which is perhaps one of the most complete I have seen in any calculator.

    The overall "retro" look of the machine is great and offers, IMO, a nice departure from the boring, brick-like, HP's of the 70's, 80's and 90's (with the exception of the 11c, 12c, and 15c) and from other brands.

    The RPN entry logic takes a little practice to get used to, but is well worth the initial effort. The build quality is good, but not excellent (hence the 4 stars). I do not know how durable the 33s is, but it feels a little bit too fragile, mainly because it is very light. My biggest complaint about the build quailty, though is that my 33s does not stand completely flat on a table. Also I would have liked the machine to be a little smaller.

    Overall, I highly recommend the 33s to anyone looking for a powerful and versatile scientific calculator....more info
  • Good Calculator
    I have owned many HP calculators. This 33S is just as good as all the rest. It will replace my old 42S which I have had for 11 years. I have loved every HP I have ever owned and this one is up to my expectations and is very good. ...more info
    The price of this calculator was about twice as much as I wanted to pay, but I had to have the RPN capability. When you have used an RPN calculator as long as I have, it's difficult to change. The metric conversion functions were a must have feature for me also. The one thing I dislike the most about this calculator is the key layout. The keys are not layed out straight across, but rather they are in a "V" orientation. If you are single finger user as I am, you will miss some keys....more info
  • Affordable Rervese Polish
    I've been using the Reverse polish logic calculators for 25 years and everytime one "dies" I panic because they usually cost over $200. This one is just GREAT! Inexpensive and has all the features, whistles and bells any scientist could ask for! Highly recommended...more info
  • Departure From Classical HP Models
    HP33s is such a huge departure from their classic model it really renders this calculator almost useless. One becomes so prone to making errors that you sometimes feel like trashing it and using a TI. The enter key location is in an area you would not expect (bottom of keypad). And it's much smaller than any other earlier HP model. I get the sense they (HP) was trying to appeal to the scientific calculator user and the RPN users but it does not's a horrible compromise. I own 2 HP32 model and this 33s model does not come anywhere close to that calculator. The key entry requires pounding to make sure the input is made. So many times I've looked at my final answer and said "what the heck is going on". Obviously, while not looking at the output screen for each and every input, you're prone to making an entry mistake and never know it. I regret the purchase only because I was expecting more functionality and a return to the RPN root--neither was achieved. My recommendation (long time HP user and fan)..SAVE YOUR MONEY....more info
  • Best one for the PE, but tough to use
    I believe this is the only approved programmable calculator on the NCEES approved calculator list. If you want a programmable calc for that exam, this is your baby. If you want a good easy to use programmable calculator for your day to day use, I would go up a couple of notches and buy the 50g (I have both). ...more info
  • Fist RPN calculator
    This is my first scientific calculator. I chose this one because it is the only RPN model allowed in the LSIT exam. I read all the reviews, and was prepared for the pros and cons. I have to say that since I have no baseline for comparison, and this is the one I've imprinted on, that I've been very happy with it. I don't have any trouble with the comma/decimal size, and the keypad design doesn't bother me since it's the only one I know. I used it for doing "cut sheets" the first day I had it and found it to be very efficient and a big timesaver becasue of all its features. I haven't gotten into programming it yet, but those that I work with who also use this model say it has great capabilities. I give it 4 stars only because it does seem a little lightweight and I'd worry about how durable it would be out in the field (I work in land surveying). It might be tougher than it looks, but it just feels a tad delicate for the abuse a field calculator gets exposed to. Overall very happy with it so far!...more info
  • Best value for NCEES exams
    The HP 33s is one of the few calculators approved for use on the NCEES tests, including the LSIT and the EIT. It is programmable, and has the built in "solve" feature which solves for multiple variables within an equation. Reverse Polish Notation allows the user to input complex formulas with ease. They are cheap enough to own two just in case of failure during the test....more info
  • Solid Pocket Calculator with Good Balance Between Power and Portability.
    I purchased this calculator for my upcoming Fundamentals of Engineering exam, and although it is the priciest of the calculators allowed on the exam, it's worth every penny. The calculator is programmable with equations, can perform integrations, and can solve equations via HP's Solve application. The only thing I was disappointed with was the programming structure. The calculator has ample memory to store programs, but it only allows programs to be called by labels which are limited to one letter from the alphabet. Still though, the ability to solve equations in a program and integrate within a program more than make up for this lack in programmability. As a plus, this calculator allows the use of both algebraic entry or Reverse Polish Notation entry. Anyone who works with difficult equations with multiple nesting of operators will immediately appreciate RPN once they learn how to use it. It saves me a good twenty keystrokes every time I solve a problem....more info
  • Not many options for rpn calcs
    My trusty 25+ year old hp15c died, and there are very few options for rpn calculators. The hp33s seemed to be it. I read the reviews and went for it. I agree with the commonly cited issue about the decimal point being too small, but I have trained myself to look closely. The keys don't feel as solid as the 15c, but after a month of use I am accustomed to them.

    I do wish it was easier and faster to switch between scientific notation and standard decimal, and to switch the number of displayed figures, but that simplicity died with my 15c.

    One complaint I have is that the batteries were absolutely dead upon arrival, and I had to go out and spend $10 for a new set....more info
  • mr
    you really don't need to buy this product if you don't have time to read through its text-book like manual. ...more info
  • Great for Engineers
    I just got my HP33s a few days ago, and I am not disappointed in any way. It is very powerful with lots of features and options, extremely light, and very comfortable both handheld and while using it on my desk. I did not have any problems reading the display, and the keys, although arranged differently from the old HP45, are comfortable, not sticky, and have a great tactile feedback. It is easy to write programs and macros, and all the features I frequently use in my everyday engineering work are directly available on the keyboard. It can also work in binary, octal, and hexadecimal (I wish I had one while I was in college). It does not come with a charger or wall plug, or a computer link, but it uses two parallel batteries, so you can replace them one at a time and never lose whatever is in the calculator memory. I have not tried the algebraic mode yet but I find this to be a great feature for somebody who is not used to RPN yet. It includes all the trig, log and stats functions and also includes many conversions and 40 constants so you do not have to remember Avogadro's number or the speed of light. Yesterday I challenged my son, who is in engineering school, to solve a few vector analysis problems, he with his TI83 and I used my new HP33s; I beat him every time. Overall I think it is a great buy....more info
    I haven't used any other HP calculator, so I cannot compare the quality of this calculator to other HP's, but it seems very well built. I love the key response it is nice to be able to feel the key feedback unlike my TI calculators. I'm a Physics student and LOVE the RPN once you get use to it calculations are so much faster than using a TI. I have had this calculator for 6 months and have not touched another calculator. If your not sure about RPN there is a free download for windows called excalibur that is an RPN calculator, so you can play around, and once you get use to RPN it's nice to have a calculator on your computer that you are comfortable using. This calculator is amazing you'll be using your TI calculator as a paperweight once you get this calculator! Plus you can use on the FE. ...more info
  • Two subjects: reliability and usefulness for PE Exam
    First issue:
    Check some examples from the manual first (say, conversion of coordinates polar<>rectangular). It did not work for me. See if it works for you.
    As for calculator overall, nothing special. Just run of the mill calculator with too many things piled up on the keys.

    Second issue:
    As for PE exam (where it is, for some reason, one of the two calculators in the list), a calculator lighter on features is more than sufficient, and you will not waste precious studying time to learn the quirks of a calculator....more info
  • Hewlett Packard Out of Touch
    I miss the chunky keys and compact, ergonomic layout of the HP11 / HP15 series scientific calculators; the simple layout was effective for quick and efficient daily work. The HP-11 was not trying to compete with the abilities of today's everyday desktop computers, which are much better suited for some of the equation solving features which the present HP 33S has, this only jumbles the "gatorback" keyboard design, not to mention the miniscule ENTER key located in the wrong place. I do like the updated simple programming display (for common formula entry)which now has symbolic notation for the programming lines; the program line and memory capacity; and the program execution speed (light years ahead of the HP11), but the layout and calculator function intent is just wrong! I also have an HP48G graphing calculator, which I'd bought mainly for the correct "large entry key location", but the memory content entry/access is atrocious, it's out of step with the usual memory RCL convention and prone to erroneous results due to its complexity; again, any old desktop computer would devour it in terms of a design tool. Calculators today need to be designed for their proper place in the engineering design environment. RPN rules....more info
  • Great Calculator--Poor Construction
    I have been using HP calculators since 1985, when I bought a 15c (my 15c lasted for almost 20 years!!!). Well, the 33s is SIMILAR to the 15c, and I would be very happy with it EXCEPT--the keys keep getting jiggly after one year of use! HP replaced my first 33s free of charge, but only gave me a 3 month or so warranty on the second one. Now the second one is experiencing the same problems (aggravating!!!). I plan to buy yet another 33s, and buy the replacement plan from Amazon, because I guarantee the keys will fail in a year....more info
  • Good enough for me.
    Good backup in case my pda w/ survey pro explodes. Tedious to enter equations and programs. Wish there was a small usb port to download programs instead of typing in 8 pages of programs one button at a time. Still i use it everyday, and couldn't live without it....more info
  • HP 33s the 15c lives on
    I have had this calculator for almost a week now. I am currently a junior level mechanical engineering major as well as a math/science tutor. I have four other hp calculators, the 30s, 48g, 49g+, and my favorite, a 15c. I have to tell you that i am a huge fan of the 11c and 15c calculators. I think that they are the perfect blend of size and functionality. I also like my 49g+ a great deal. Due to the increasing popularity and value of the 15c, I was looking for something similar that I could throw in my back pack and take to school with out the fear of it being stolen or distroyed in some insane scooter accident. This calculator interfaces exactly like the 11c and 15c. It has the exact same program interface as well. Programming this thing is fun and easy. It makes you feel like a hero to be wizzing through some of these lengthy formulas while others are frantically pushing buttons. It even one-ups the old dogs by offering a way to imbed messages and equations in your programs. It also can prompt you for variable inputs instead of storing the variables before you run the program. In short, I love this thing. I am shelfing my 15c for the collector value. Also, I understand that there are 20 some odd years of improvements between the 15c and the 33s, but it is funny to program in the same equasions and watch how the 33s instantaniously displays the result, while the 15c flashes "running" for 10 seconds. Buy this calculator, its amazing. Learn to use RPN. It will make you smarter, lol, maybe not, but it will make you examine long math problems much more efficently. This is a great machine with a great lineage. Maybe it helps that I live in Corvallis Oregon where the 10c series was birthed and have talked to some of the engineers who built these things, but i love them. If you are looking to put away a vintage calculator that is increasing in value without learning a whole new operating system, or are in the market for a super fast super versitile programmable scientific calculator, this is your best bet. Don't wait till the FE exam to get it. You can master programming this thing in a few hours if you know RPN, and a couple of days if you don't....more info
  • New to HP 33
    This takes some getting use to since all I have ever used is TI calculators. But I do like it...more info
  • Still learning ins and outs of RPN, but can already tell this is a great calculator!
    Having gone through three TI scientific calculators as well as 2 TI graphing calculators over the course of middle school through college, it was an interesting shift to try out this HP. My motivation was the all the praise that I had read about RPN, coupled with the large amount of calculations I need to perform as an engineering major.

    I agree with several other reviewers on the its great build quality, but unappealing V-shaped layout. A more structured rectangular key layout would've been much cleaner. Some reviewers claim that at times one would press a key and it wouldn't register properly--I have not really had this issue, and compared to the TI general purpose scientific calculators, I find the keys much more solid. As for the decimal point, I really don't think it's that bad...

    From a college student's perspective, I would recommend anyone willing to explore RPN to purchase this early on (preferably during winter or summer break) in order to get used to the RPN system. While it boasts a dual-capability of RPN and Algebraic, the layout is clearly designed for RPN usage--even the parenthesis keys (which RPN takes away the need for) are located in a shift-key rather than a direct keystroke. Plus, the calculator overall is not incredibly intuitive.

    I've begun going through the manual (which is about 3/4 of an inch thick) and there is a wealth of features which one could take advantage of, but would need to take time to learn initially.

    All in all, this is clearly a serious calculator. Design issues, potential decimal point viewing problems, and learning curves aside, I agree with many that this just may be one of the most functional scientific calculators available today....more info