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The Best Calculators for Geometry

By Kathleen Cantor, 02 Nov 2021

Out of all school supplies available to students, there is only one that we can always lean on when faced with challenging Mathematical problems. Calculators are one great invention that we are always grateful for in dealing with the different branches of mathematics such as algebra, trigonometry, and geometry. With these higher-level courses, there will come a point in our life as a student or a professional when we will need more than just a four-function calculator or even just a scientific calculator.

What Is Geometry?

Geometry is a branch of mathematics that deals with the size, shape, and position of 2-dimensional shapes and 3-dimensional figures. It is a focus that goes beyond arithmetic and algebra. Learning geometry will require the best tools, including a graphing calculator.

Why Do I Need a Calculator for Geometry?

While there are many online calculators available online, it is still best to consider investing in a tangible calculator. Without worrying about the limitations or monthly subscription fees, you can use its available functions all out and you will never have to worry when standardized tests come.

The 5 Best Calculators for Geometry

If you are a student and you haven’t asked your teacher for recommendations yet, here are our top 5 picks for the best calculator for geometry.

Texas Instruments TI-Nspire CX II CAS


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The Texas Instruments TI-Nspire CX II CAS Calculator is the best there is. With its most advanced features, it has a wide variety of use not limited to Geometry. It is built with an amazing set of preinstalled apps, functions, and tools that make it stand out over other graphing calculators. 

This graphing calculator is helping in constructing and exploring geometric figures and creating animations. It also allows you to perform mathematical operations on data and visualize the connections between the data and their plots through a spreadsheet.

It includes a high-quality and high-resolution colored LCD screen display that enhances the overall interface of the calculator. This display improves user experience even with its full powerful features. With its massive storage of up to 100 MB along with its powerful CPU, you won’t have to worry about beating time limits. It has a rechargeable battery that can last up to two weeks on a single charge.

As we speak of time limits, this calculator will also be helpful if you are to take SAT since it is one of the allowed calculators in taking the said test.

Texas Instruments TI-84 Plus CE Graphing Calculator

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The TI-84 Plus CE Graphing Calculator is preloaded with apps, images, and interactive zoom features. In addition to its advanced applications, it is built with a CPU that allows the calculator to store up to 3.0MB. It also features a full-color screen display that sets elements in a color-coded presentation. This display experience makes equations, plots, and graphs easier to read and it improves the overall user experience.

This graphing calculator presents itself in a sleek design with its thin and lightweight form that does not compromise a high resolution and a full color backlit display. It comes in a wide variety of colors where you can choose from such as black, gray, purple, teal, and orange.

You don’t also have to worry about taking your standardized tests such as PSAT, SAT, ACT, and AP since it is one of the approved calculators. The TI-84 Plus CE is built with a rechargeable battery that will keep your calculator up when needed

Texas Instrument TI-83+

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You may have noticed that our top 3 picks are from Texas Instruments. When it comes to functionality, they have designed the best calculators that are helpful in Mathematics for either high school or college students. 

On our third spot, the TI-83+ has many of the features and functions which is helpful in geometry as well as science courses. It is built with a fast CPU with enough RAM and storage to run its limited programs.

This calculator is the best choice for high school students and college students who will have to deal with basic Mathematics that needs high-end graphing calculator features.

Casio FX-9860GII

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Another calculator that includes a pre-loaded geometry application and other advanced applications feature is the Casio FX-9860GII. Its high resolution and large display screen make sharper images of graphs, formulas, and graphics.

Its powerful CPU can also store up to 62KB RAM allowing fast displays of graphs. It is also a very competitive graphing calculator that is parallel with the functions and features of Texas Instruments only much cheaper in comparison.

The CASIO fx-9860GII graphing calculator is permitted for use on the PSAT/NMSQT, SAT, and ACT college entrance exams and AP tests. It is best for high school and college students who are dealing with a higher level of Mathematics.

Numworks Graphing Calculator

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Joining in the last spot is the Numworks Graphing Calculator that is well-designed. This smartphone-looking calculator is well presented that anyone taking a Geometry class will have the motivation to use it in every mathematical way. It has a high-resolution color screen and a high capacity rechargeable battery that enables convenience for the user up to 20 hours per charge. 

With its 6 tailor-made apps, finding answers to your tests questions will be easier. Its functionalities have been designed with teachers from the NumWorks community and cover the whole high school curriculum. 

Its price fits with its limited functions and key features and is very compatible with high school students.


Our top 2 picks which were from Texas Instruments are the best graphing calculator that we can recommend. The TI-Nspire CX II CAS and TI-84 Plus CE are capacitated with the best features there are for graphing calculators not only for Geometry but for almost all the higher-level Mathematics branches. Its quality will speak for its price.

Frequently Asked Questions

What can I do with a calculator in Geometry?

Aside from never having to worry about the use of pen and paper in making your illustrations in Geometry, you will save a lot of time in answering questions involving figures. With a calculator in your hand, you are one step ahead of those who do not have one.

What to consider in buying a calculator

It is necessary to know why and what calculator to buy. There are only three considerations in buying a calculator. These are Requirement, Features, and Price.


You need to know what the purpose of your buying is and where to use it for. If you’re going to use it in a future test, then you have to check its approval to save yourself from double purchasing. If you’re going to use it in the class, you should ask your teacher.


What makes calculators unique is that they may not be a daily essential but they sets a huge difference when needed. Considering the key features and functions of the graphing calculator you intend to buy should be aligned with the purpose of your buying.


 Price may be the underestimated or primary consideration that you may take. Either way, with the variety of calculators available in the market, you have to know the capability of your pocket and make some good use of your ability to research.


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