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  • Texas Instruments TI-85 Advanced Graphing Scientific Calculator
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Texas Instruments TI-85 Advanced Graphing Scientific Calculator


Available from these sellers.
  • Up to 99 graphing functions defined, saved, graphed, and simultaneously analyzed
  • Easy-to-read 8-line by 21-character display
  • Link capabilities for data transfer through I/O port
  • Powered by 4 standard AAA batteries with a lithium battery backup
  • Guidebook, unit-to-unit link cable, case, 1-year warranty
15 used from $23.00 1 refurbished from $69.99

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Product Details

Product Manual [9.18mb PDF]
  • Shipping Weight: 12.8 ounces
  • 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.
  • ASIN: B00005QT8A
  • Item model number: TI-85
  • Average Customer Review: 3.3 out of 5 stars  See all reviews (59 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: September 4, 1973

Product Description

Product Description

The Texas Instruments TI-85 has been designed as a graphing calculator for engineering and calculus students; yet it is versatile enough for other math applications.

Amazon.com

Designed with students of higher math in mind, the TI-85 is a scientific calculator that offers a wealth of features and functions that will take you smoothly from pre-algebra all the way through college calculus. Its data I/O port and unit-to-unit link (compatible with all TI-85 and TI-86 models) allow you to easily transfer your final graphs and equations among systems, while the 28K RAM and customizable menu keys provide quick access to necessary programming functions. As you advance through classes, simply reprogram the keys to keep up with your new textbook chapters.

Functions are widely varied, and include the ability to solve for systems-of-equations, polynomial-root, or any variable in an equation. Graphing possibilities include parametric equations, polar equations, and solutions to differential equations. Statistical analysis runs the gamut from linear, logarithmic, exponential and power to quadratic polynomial, cubic polynomial, and quartic polynomial regressions. In addition, data is viewable as strings, pictures, or vectors. Simultaneous separate graph capability and 15 interactive zoom features are also included.

The display is a generous eight lines long and 21 characters wide; this unit is powered by four AAA batteries, with a dependable long-life lithium ion providing memory backup. Texas Instruments includes a one-year warranty covering parts and service.

What's in the Box
TI-85, lithium backup battery, link cable, guidebook with warranty card, and impact-resistant slide case; AAA batteries not included

Customer Reviews

No, you may not use my calculator.
4NeedShopper
It is so hard for me to see the numbers display on the screen except if i want to destroy my eyes, so i have to abandon it and go back to my previous calculator.
muftau ibraheem
And did I mention that it came so very very fast!
Nathan Reichert

Most Helpful Customer Reviews

20 of 20 people found the following review helpful By Kyle Debruyn on April 28, 2010
This calculator got me through two years of advanced high school math, two and a half years of college calculus, and general use almost every day at work as an engineer/scientist. It is my calculator of choice for EVERYTHING from simple arithmetic to graphing complex equations, to solving integrals and differential equations. The battery life has been phenomenal -- I maybe change them out once a year, if that. I have used it almost every day for 15 straight years. Contains some very powerful features and functions for almost any math need you can throw at it. You can purchase a used TI-85 for not much money these days as well. True, it may not be as easy to use as the TI-83, but I would never give up my TI-85 for anything.
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13 of 13 people found the following review helpful By Jason Patterson on January 18, 2003
With a large number of features and a huge range of functions, the TI-85 is a graphing tool that is well worth its cost. It is fully programmable, using a BASIC-like programming language. Texas Instruments discontinued this line of calculators however, and though they may have had their own reasons, I know of at least two flaws with this particular calculator. The first is that there are some bugs in its programming, such as its inability to convert negative temperatures. The second and much more serious problem is that the screen is not reliable. Roughly half of these calculators have one or more lines or columns of pixels fail after a few years of use. As long as you aren't paying retail price, however, the $$$it might cost for a used TI-85 is more than worth it. Enjoy.
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11 of 11 people found the following review helpful By Jennifer Hersom on July 27, 2007
I used this calculator throughout all of my high school and college math classes. I got years of use and never any problems!
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8 of 9 people found the following review helpful By A Customer on September 9, 2003
I used a scientic calulator for years. I bought the TI-85 my Senior year of High School and even though I'm not yet in college (five years later) I'm still a nerd that likes to play on it. most of time I just use it for basic stuff I can still do with a new TI-30X I bought granted I can graph with it and I've been looking hard at TI-89 for no other reason than I can. (more than likely would be my next purchase if I did buy another one) the sad thing is resources for this calulator are limited seeing as it's been discontinued but you know it's still more powerful with it's computing power over my GF TI-83 plus. it just lacks the storage of memory.
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5 of 5 people found the following review helpful By DV_User on March 24, 2003
Verified Purchase
Its an excellent investment for engineers. The Calci helps a lot in mathematical calculations. It has a Huge number of engineering applications. Few applications which I found VERY Useful are
(1) Inverse of a Matrix (2) Solving Quadratic and higher order Equations. (3) Plotting the graph of Algebric Equations which help in finding out the Maxima and Minina..
regards,
A Graduate Student
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3 of 3 people found the following review helpful By wolfmaster757 on December 1, 2011
My TI-83 was stolen in my physics class one day (still pissed about that), so I bought this cause it was half the price and I was not gonna pay over $100 for another calculator. It worked great! It wasn't new, but that was okay. A few scratches here and there, but overall it did the job and I passed physics.
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3 of 3 people found the following review helpful By Cherra on July 26, 2010
I first bought mine in high school in 1996 and it's still going strong to this day. This is a great calculator and it has all the functions necessary to carry you through high school and college match classes (and beyond). If yours doesn't arrive with a manual, it is available online at the following link: [...]
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2 of 2 people found the following review helpful By Carrie Luckado on September 29, 2011
Verified Purchase
My son needed this type of calcultor for 10th grade math and given the price of a new, similar calculator, this was a great buy! He says is works great also-thank you so much, you saved the day!
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