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Hewlett Packard HP-11C Scientific Calculator + Case & Manual Tested SEE VIDEO - Picture 1 of 15

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Hewlett-Packard HP 11C Handheld Electronic Calculator

4.8283 product ratings

The Treasure Addict (5417)
100% positive feedback

Price:

$179.99

+ US $9.95 shipping

Estimated delivery Tue, May 7 - Thu, May 9

Returns:

30 days returns. Buyer pays for return shipping.

Condition:

Used

Calculator is in very good condition with light surface wear. Most obvious wear is on the embossed logo in the upper right hand corner. Case and manual also show light wear. According to serial number, this calculator was produced in July of 1986. Clean battery compartment. New set of batteries have been installed. Self test has been run and calculator is in good working order. Smoke free home. See all pics and video for details.

About this product

Product Information

A mid-range and programmable scientific calculator, the HP 11C has two features that are an improvement from an earlier version, the HP-33E/C. These two features are its built-in random number generator and a backspace key that enables users to correct a problem or formula one number at a time. Other built-in features of the HP 11C calculator include hyperbolic and inverse hyperbolic trigonometric functions, combinations and permutations on probability, percent change, factorial, and absolute value. The main advantage of the HP 11C calculator is its programming capabilities. This allows for label addressing (0-9 and A-E), subroutines (nestable to 4 deep), 8 conditional tests, increment/decrement loops, and 2 flags. Users also have the option to redefine the number of certain keyboard keys.

Product Identifiers

Brand
HP
MPN
HP11C
Model
11C
eBay Product ID (ePID)
92927550

Product Key Features

Power Source
Battery
Size
Handheld
Key Size
Regular
Type
Scientific

Additional Product Features

Display Type
Regular
Digit Display
10 Digits
Family Line
Voyager Series 10

4.8

4.8 out of 5 stars based on 83 product ratings

83 product ratings

71 users rated this 5 out of 5 stars
10 users rated this 4 out of 5 stars
1 users rated this 3 out of 5 stars
1 users rated this 2 out of 5 stars
0 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 57 reviews

5 out of 5 stars
by ranovak_clcovin...Dec 13, 2017
Top favorable review
Classic calculator for engineers
I bought one of these new in 1987, and used it for 30 years daily in my work as a chemical engineer in industrial R&D. When it was recently lost (or perhaps stolen), I looked at other calculator options to replace it. There are many scientific calculators available today, but none offer the combination of the required functionality, simple use, compact and lightweight form, and nearly indestructible reliability presented by the HP-11C. So, I purchased another one on ebay, and am very happy to have my calculator back. This type of HP calculator has achieved a near legendary status among those that value such items as professional tools, and for good reason.
Verified purchase: Yes
2 out of 5 stars
by jamesridesSep 07, 2016
Top critical review
HP 11C RPN Calculator.
These are a great legacy RPN calculator. IF you do not know what RPN stands for, check it out with Google. Be suspect of condition of keyboard and if it is missing the badge, This is a sure sign of abuse... Buyer beware. You can get the replacement rubber pads on the back, its easy to replace them. Look for good mechanical key operation and a seller willing to take it back if it does not perform! You will get what you pay for. This was a calculator with a bad display (inconsistent), keyboard function labels are bubbling like a solvent was used on it. Great calculator, this particular one was a bad purchase.
Verified purchase: Yes
5 out of 5 stars
by richardvt1952Jul 03, 2018
Incredible small in size , huge in function, and the best crafted engineering calculators made!
It is the 2nd one of these I now have in my possession (both in near mint condition) - as well as the HP-15C (with Original Manual) I just purchased in near mint condition (only a small minor 4 letter tag on back bottom). All work as good as new out of their box! I use one of the HP-11C's for some actual calculations and it sits next to my home desktop for quick access. As a professional structural engineer - these calculators are the very best ever made for my type of calculations done - even though much of the grunt work is now done by spreadsheet and computer analysis software.
Verified purchase: Yes | Condition: Pre-owned
5 out of 5 stars
by psw1747May 03, 2015
A historical calculator and still better than modern products.
In 2014 NY, a lady using HP12C, and I wondered the calculator has no = key. She told me it's RPN. (Reverse Polish Notation) I recalled RPN was an efficient input method for both programmers and users, especially its memory was very small and limited. It was kinda re-discovered or news that RPN calculators are still in use. After I came back to Japan, got to know the history of Scientific/Finacial calculator, which was developed by HP. And I have never had this HP11C but HP15C, quite same functions except Matrix or imaginary numbers. The design of the HP1xC series is absolutely sophisticated and compact as HP200LX but this one really fits in my small pocket. The button layout is wonderful, I used to have some sci. calculators and normal calculators by casio, only the good thing on casio is solar powered. I have still fx260a but I am not happy about its button layout, way too many useless keys and useful keys are behind them... HP1xC series, the layout is the work of Leonardo da Vinci. These modern days, this kind of calculators must be more sophisticated than 30 years ago and I don't see any of Casio or Sharp, even HP itself make a better product than this HP11/15C. They are cheap, not inexpensive just cheap, many bugs, unfriendly user interface, bad key touch, etc. So price doesn't matter to me, I like the way of operating this calculator and superb beauty like a fashion model. And when I look at the HP1xC, it makes me realized the long history of mathematics, physics with the abacus and slide rulers. This machine is the most shiny and brilliant moment of our pre-internet ere. I carry this item everyday in my pocket or in my bag. Only one acceptable replacement is HP32S/IIRead full review
5 out of 5 stars
by relayer1974Sep 19, 2015
A small powerhouse RPN scientific
The HP 11C calculator has stood the test of time in terms of construction and function. It is compact and full of features. It can even be programmed by the user. The keys are hinged and tactile so they do not wobble and provide positive feedback. If you can find one on eBay for less than $100, grab it or a 15C. They'll both serve you well.
Verified purchase: Yes | Condition: Pre-owned

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Picture 1 of 15

Hewlett-Packard HP 11C Handheld Electronic Calculator

About this product

Product Information

Product Identifiers

Product Key Features

Additional Product Features

Ratings and Reviews

Most relevant reviews

Classic calculator for engineers

HP 11C RPN Calculator.

Incredible small in size , huge in function, and the best crafted engineering calculators made!

A historical calculator and still better than modern products.

A small powerhouse RPN scientific

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