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HP 33S Scientific Calculator (F2216A)

by HP
3.9 out of 5 stars 221 customer reviews
| 3 answered questions

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  • 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
2 new from $389.95 6 used from $84.99 1 refurbished from $149.99

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Product Description

Style Name: 33S

Product Description

Item #: HEWF2216A. 33S Scientific Calculator
Display Characters x Lines10 x 2
Formula NotationRPN/Algebraic
Scientific Notation
Storage Memory32K
Variable StatisticsTwo
Levels of Parentheses6+
Base Number Calculations
Fraction Calculations
Fraction/Decimal Conversions
Complex Number Calculations
Probability (Random Number)
Linear Systems
Quadratic Solvers
Size3-1/4w x 6-1/8d
Battery Powered
Replacement BatteriesDURPX76A675PK (sold separately)
Handheld calculator with large LCD display. Includes operating battery and protective case.
Customers also search for: 2-Line Display;Battery;Calculator;Calculators;Handheld;HEWLETT PACKARD;HP;Math;Pocket;Scientific;Scientific/Math


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

Product Information

Style Name:33S
Product Dimensions 10.4 x 7.6 x 3 inches
Item Weight 2 pounds
Shipping Weight 1.5 pounds
Manufacturer Hewlett Packard
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Item model number F2216A
Customer Reviews
3.9 out of 5 stars 221 customer reviews

3.9 out of 5 stars
Best Sellers Rank #129 in Electronics > Office Electronics > Calculators > Scientific
#119,215 in Office Products > Office Supplies

Technical Specification


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By David Simpson on July 22, 2004
Style Name: 33S Verified Purchase
There has long been a real need for a high-quality scientific calculator for serious scientific and engineering professional, so I was glad to see HP back in the market with the HP-33S, a replacement for their popular HP-32SII (of which I own three!). With some caveats (see below), I've found this to be a very good scientific calculator, and probably the best one being manufactured today. I guess HP finally noticed that people are willing to pay over $300 for a used HP-32SII, and took the hint.

First, some general comments. I judged the overall quality of the calculator to be quite good. The keys have a good solid feel, like traditional HP calculators. It has about 80 times the memory of the HP-32SII, and I found it to run about 2.5 times faster. The manual is excellent -- clear and very well written, and similar to the HP-32SII manual.

The HP-33S has a few new features that weren't on the HP-32SII:

- Both RPN and algebraic entry modes. (The default is RPN.) I use RPN exclusively myself.

- Several new functions: cube, cube root, integer divide, remainder, greatest integer, and signum.

- A menu with 40 built-in physical constants (speed of light, electron charge, etc.). This is a great feature; I was constantly having to look up physical constants and store them in registers; now the constants are built in.

- A feature to shift the exponent of a number in engineering mode by factors of 1000.

- Four-way cursor keys (as you would find on a PDA or graphing calculator).

- Two-line display (to show both the X and Y registers).

The HP-33S does have a couple of drawbacks:

- Most importantly, as others have noted, the decimal point (and comma) are WAY too small.
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Style Name: 33S
I have an HP-32SII that's started to behave a little flaky so I bought this as as replacement. Compared to the HP-32SII, this has a couple of improvements that I find useful:

-- The 'eng' key to display the current result in engineering mode is a nice way to avoid always having your calculator in 'eng mode'; sometimes handy.

-- I like the constants library.

There are only a couple of items where I think the result is _worse_ than the HP-32SII:

-- The overly small decimal point. I still find it completely usable but this clearly a faux pau for HP.

-- On the '32, all the menu screens fit onto a single line, even though doing so caused some functions to only be given two characters. On the 33, they chose more characters but sometimes you have to scroll the menu line. Example: For Sums->(sum of x*y). The '32 just lists 'xy' whereas the '33 you have to scroll to '(sigma)xy'. More readable, yes. Better, no... especially since they had two lines but only ever use the first one!

...and then there's a LONG list of items that I think HP could have done that they didn't. The HP-32SII was released something like a decade ago, and it's poor that this new model doesn't reflect a little more work over that decade. Examples:

-- Still only single character variables names. With so much (31K) memory vs. the '32 (some hundreds of bytes), why?

-- Editing equations can still only be done via backspacing, not true left/right cursor key movement. Sheesh.

-- Complex numbers still take up two levels of the stack and therefore require you to use two keystrokes to manipulate them.
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Style Name: 33S
Well, the tiny decimal & comma display is just unfortunate. But it does have an excellent fraction display mode. It has the ability to approximate fractions and indicate the +-5% error with an up or down flag on the display. I am tempted to use fraction mode all the time as I am getting eye strain trying to squint and find the decimal point. The other solution is to always FIX the decimal places so you know where the decimal point is. The new ALL display mode keeps us guessing on the location of the decimal point.
In contrast, the unusual keyboard design is actually quite effective. The angled key layout forms a "V" shape. The appex of the V shaped rows helps visually partition the keyoard into two symmetrical halves and seems to make locating functions easier. Eventually, you begin to associate one of three key shapes with the key function (ignoring the silver keys) in addition to the row and column of the respective key.
RPN mode is great but having algebraic mode that shows the entire calculation sequence as an equation is a great addition. This is handy if you are making impromptu calculations without paper and a pencil to write down equations first. I have been a great fan of RPN for decades but it is easy to loose track of a long, multi-level calculation series. Even if you write down a long equation on paper and begin punching it into an RPN calculator, you could get side tracked and you forget what part of the equation you need to resume entering. This is where I see the benefits of Algebriac mode that has the ability to show in real time, the history of your entries. Try it in this calculator and you'll see what I mean (you have to enable it with the ALG key).
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