Best Engineering Calculators in 2022 – Reviews and Buyers Guide

The majority of the students find math difficult, isn't it? It's because of the complexity of math, incredibly advanced calculation in the engineering sector.

In the field of engineering, everything runs on calculation. These complex problems are not possible to solve for a human being instantly. Therefore, a scientific or engineering calculator is a piece of mandatory equipment for every engineering student and professional. For school and college students also, a scientific calculator is essential for their math and science classes.

So, it is essential to find the best engineering calculator according to your preference.

In this article, we'll be covering some great engineering calculators. We hope this will help you know special features, advantages, and disadvantages in detail and choose the best one for you.

Product Image

Product Name

Editor's Rating


Texas Instruments TI-36X Pro Engineering/Scientific Calculator

5 out of 5

Helect 2-Line Engineering Scientific Calculator

5 out of 5

Casio FX-991EX Engineering/ Scientific Calculator

4.5 out of 5

Scientific Graphic Calculator – CATIGA CS121 – Scientific and Engineering Calculator

4.5 out of 5

Sharp EL-531TGBDW 12-Digit Scientific /Engineering Calculator

4 out of 5

Our Top 11 Best Scientific Calculator in 2022

#1. Best Overall: Helect 2-Line Engineering Scientific Calculator

Helect 2-Line Engineering Scientific Calculator

Are you a school or college student? Looking for a decent, simple calculator for your math and science classes? Helect 2- Line Engineering Scientific Calculator can be an excellent choice for you at an affordable price. This lightweight and the straightforward best scientific calculator will meet all your basic necessaries. One of the best calculators for engineering like this will meet all your necessities.


Good Battery Life: This device is pretty good for long-term usage. The 2 × L1154F batteries assure you at least 2-years of usage.

Value for Money: For the price! This calculator is unbeatable. It has functions similar to the more expensive calculators. It's a decent calculator to do the functions you need of basic calculations plus a few more.

Two – Line Display: It offers a 12-digit widescreen HD display. The 2-line display can show your inputs and results at the same time. In addition, you will be able to see your results in standard textbook format.

Protective Case: A protective hard slide case protects your device from getting damaged. So you can carry your device anywhere without worrying. This hard case also keeps the display and keypad clean.

Portability: Sometimes, you need to travel with your calculator. This is a lightweight, portable and compact calculator. Take this with you easily wherever you want to.


  • Brand: Helect
  • Calculator type: Scientific
  • Dimensions: 6.3”× (L) × 3.3” × (W) × 0.8” × (H)
  • Weight: 6.3 ounces
  • Power supply: 1× AA size battery
  • Operating temperature: 32°F – 104°F
  • Power consumption: 0.0002W


  • Easily calculate 1 and 2 variable statistical calculations.
  • Hard case gives extra durability.
  • Easy to use and easy to press keys.
  • Shows entry and result at the same time
  • Good battery life


  • Keys are not responsive at a time.
  • The screen is tough to see at other angles than straight on

#2. Casio FX-991EX Engineering/ Scientific Calculator

Are you looking for a good non – graphing calculator? Casio FX – 991EX is probably the best non – graphing calculator you can buy. It's a perfect combo of excellent performance, all the necessary functions, useful QR feature, premium display, dual power source, etc.


Superfast Performance: This calculator comes with an extremely fast processor. As a result, it provides fast calculation and smooth performance for students, which is useful, especially during examinations.

Extensive and advanced service using QR code: A new "QR" feature can display graphs on your smartphone or tablet screens. The unique feature of this calculator is "QR." You can generate QR code through Online Visualization Service for your problem. Then, to see a graphical representation of your data, you can scan the code on your smartphone or tablet.

4- Line natural textbook display: A larger display and better-shaped fonts make it easier to read. You will love the icon display of the main menu. The high-resolution LCD panel is crystal clear and crisper. Moreover, it makes it easy to visualize complex mathematics and formulas.

Essential functions: Unless you want the graph function, this device has all the functions you need. The integral function, the ability to solve complex and imaginary problems, can be a game-changer for you. It offers almost all the necessary functions to support student's learning.

Constants & conversations menu: No more taking off the back cover and looking up constants/conversations from a list. It has all constants and conversations categorized by types in the options menu, making it much easier to find.


  • Brand: Casio
  • Calculator type: Scientific
  • Functions: 552
  • Display: 4-line natural textbook display
  • Dimensions: 11.1× 77× 165.5 mm
  • Weight: 90g
  • Power source: Solar + 1 LR44 battery (included)


  • Excellent display, very easy to read
  • Statistics mode is simply the best
  • Solar power sensor is sensitive and works even under dim conditions
  • Faster processing


  • No GCD/ LCM
  • Changing modes or powering off clears all history, including spreadsheet data.

#3. Scientific Graphic Calculator – CATIGA CS121 – Scientific and Engineering Calculator

If you need a graphing calculator on a budget, this is it. This is one of the cheapest graphing calculators available. The best thing about this calculator is pricing. You will get more than you pay. A bunch of functions, large displays make this calculator very handy for all levels of students.


Graphic Function: This scientific calculator can show graphs and formulas. There is a built-in function that shows how to graph. It has functioned so you can use the graphs analytically.

Programmable System: It's a great feature for professionals. Students don't have to memorize buttons which is essential for more proficient learning.

Over 280 functions: This calculator comes with lots of functions like- trigonometric tri, logarithmic and exponential functions, binary, Octal, decimal, hexadecimal calculations, transformation, degree, minute, second, statistical calculations, regressions, standard deviation, permutations, etc.

Large Display: It has a larger LCD panel. The panel shows graphs and equations simultaneously, way easier for drawing a perfect graph.


  • Brand: CATIGA
  • Dimensions: 7.12 × 4.5 × 0.8 inches
  • Weight: 4.8 ounces
  • Batteries: 1 LR44 battery required (included)
  • Display type: LCD


  • Less expensive
  • Lightweight
  • User friendly


  • No instructions or manual
  • Build quality is not impressive

#4. Sharp EL-531TGBDW 12-Digit Scientific /Engineering Calculator

Need a good non-programmable calculator? Sharp EL-531TGBDW can be a great choice for you. It does almost all the necessary functions for school or college students. Besides, forget about that old-school calculator; it has an impressive and fantastic design.


12 digit large display: This 12 digits large display shows inputs and results at the same time. A larger display, more prominent icon makes your visual experience far better.

D.A.L feature: This calculator can show calculations the same as written on paper with DAL (Direct Algebraic Logic) function. This feature is handy for better understanding and accuracy.

Stylish look: This device is a great example of beauty. A sliding shell protects the screen and the device. The beautiful-looking sliding case gives this calculator more charm.


  • Dimensions: 3.1× 0.6 × 6.1 inches
  • Weight: 3.4 ounces
  • Power source: Solar and battery
  • Display type: 2 Line LCD
  • Material: Plastic


  • Easy to use
  • Beautiful glass screen
  • Great hand feel


  • Difficult to see in low low-light situations.

#5. Texas Instruments Nspire CX CAS Graphing Calculator

Texas brings an advance and extremely powerful calculator. This device is a beast. If you are looking for the best engineering calculator, here it is. It comes with some unique features and advanced functions like CAS, touchpad, color display, rechargeable battery, etc. It's probably the best scientific calculator for engineering students.


CAS feature: The CAS (Computer Algebra System) allows solving, expanding and shows you simplified answers. This feature can be convenient doing calculus. In addition, this feature allows students to check their work. This device comes with PC software.

Functions: This calculator comes with a large library of built-in math functions and the capability to plot graphs. The built-in spreadsheet function can perform linear regression. The 3D graphing function can also be a very unique and useful feature for you.

Backlit, color display: This calculator has a clear, high-resolution color display. See your calculation more lively. Normal displays are not visible in the darkness. But, you can use this instrument in any lighting condition for its backlit display.

Rechargeable battery: The rechargeable battery is one of its game-changing features. You don't need to rely on a set of Lithium-ion batteries. Instead, charge it via USB cable and never get run out of your battery.


  • Dimensions: 7.28 × 0.59 × 3.15 inches
  • Weight: 15.2 ounces
  • Power source: Rechargeable Li-ion battery, Solar
  • Display type: 3.2 inches LCD backlit color display
  • Material: Plastic
  • RAM: 64 MB.
  • Kit includes: Hard case, USB cable, unit–to–unit USB cable
  • Connectivity: USB


  • Color screen and better resolution.
  • Can graph in 3D and rotate the graph.
  • It has room for notes.
  • Full alphabet keys.
  • Rechargeable battery.


  • The buttons feel a little flat or no bounce.
  • The touchpad mouse is hard to use.

#6. FX-115ESPLUS Casio FX115ESPLUS Scientific Calculator

Casio has brought a great non-graphing calculator for school and college students. Such compact, user-friendly instruments with lots of mathematical functions at a good price. It can deal with integral and derivative approximations, arbitrary base logarithms, summation, and lots of mathematical problems. This can be a perfect choice for science students.


Conversations/Constants: It's quite a difficult job to remember many conversions and scientific constant. So, 40 metric conversions and 40 scientific constants are printed on the hard slide case. So, it makes your calculation much more effortless.

2-line textbook display: A large two-line display shows your formula and result as they appear in the textbook. See your inputs and result at the same time.

Solar charging: This calculator comes with a great battery. It also supports solar charging technology. The solar powering system is convenient for a long-time battery backup.


  • Brand: Casio
  • Dimensions: 0.44 × 6.38 × 3.15 inches
  • Weight: 3.35 ounces
  • Power source: Solar and Battery
  • Material: Plastic


  • Incredible price/performance value.
  • Intuitive entry
  • Powerful capabilities
  • Light and ergonomic
  • Built-in cover protects
  • Tiny little battery will last 3 years of normal use


  • Keyboard has a very light touch, and a little wobbly and mushy
  • Colored key labels a somewhat hard to read/distinguish.

#7. Sharp EL501X2BWH Engineering / Scientific Calculator

EL-501X2 is perfect for general math & science, pre-algebra, and trigonometry courses. This calculator offers 146 essential scientific, math, and statistics functions. It is affordable yet doesn't fall short of providing some incredible features. Unless you need functions beyond this calculator's capabilities, there's no reason to buy something more expensive.


One-Line display: Its one-line, 10 digit display shows result in a larger font. It's pretty easier to read and helps prevent errors. Larger fonts are very helpful for those who have weak eyesight.

Essential scientific functions: This scientific calculator has 146 functions, including logarithms, reciprocals, powers, roots, factorials, trig, hyperbolic trigs, constant calculation, chain calculation, N-base calculations, DEG, RAD, GRAD, 1 variable statistics, etc.

Protective case: The Hardcase protects the calculator from being damaged while traveling. In addition, it keeps the interface and keys clean.


  • Brand: Sharp
  • Dimensions: 1.1(w)× 8.5(H) × 5(D) inches
  • Weight: 4.2 ounces
  • Display: 1-Line
  • Power source: Battery


  • Simple, easy to use.
  • Good key layout.
  • Responsive buttons.
  • Value for money.


  • Front panel is a fingerprint magnet.

#8. RENUS 2-Line Engineering Scientific Calculator

This device is for you if you are looking for an advanced scientific calculator with a 2-line display. It can be ideal for professionals and students in mathematics, algebra, trigonometry, science, engineering, physics, and chemistry.


240 functions: This device supports 240 necessary functions, including basic calculation, degree, min, sec, memory calculation, scientific function calculation, statistical calculation, and many more.

Large screen: It has a two-line large LCD, which is clear and sharp. The calculator shows the operations and syntax of the entry, not just the answer. It becomes a handy feature when students don't know they're not getting the right answer.

Reply key: Easily go back and change the individual numbers of the equation without restarting the process. This is a special and unique feature you will get from this calculator.

Hard sliding cover: A hard case is provided to keep the keypad clean. This case also provides a comfortable grip. So your favorite device is pretty safe inside the protective case.


  • Brand: Renus
  • Dimensions: 6.69×3.54×0.79 inches
  • Weight: 5 ounces
  • Power consumption: 0.0002W
  • Power source: Battery
  • Display type: 2 line LCD display


  • Clean layout
  • Pretty big keys
  • Value for money product
  • Batteries come in plastic
  • Easy to use


  • Buttons are less responsive sometimes
  • Keys are loud

#9. Casio FX 260 Solar || Scientific Calculator

How does it feel when your test is going on, and your calculator's battery is gone?? It's an annoying situation. However, Casio has brought a solution for you. No worry about running out of power. Casio FX 260 Solar || Scientific Calculator comes with a solar powering system. This device will help you in your general math, pre-algebra, algebra, trigonometry, statistics, and science courses if you are a school or college student.


Large Display: Casio FX 260 Solar || Scientific Calculator has 10-digit, 2- line large LCD display.

It makes your viewing experience better and easier. You can see your input and result at the same time.

Essential functions: This calculator comes with almost all the necessary functions. You will find functions like fixed decimal capabilities, the correct order of operations sequence, square & cubic roots, percent calculations, trigonometry & inverse trig functions, fraction simplification, logarithms, polar/ rectangular conversation, scientific notation, and many more.

Solar power: This calculator is solar-powered, probably the most lovely thing. Moreover, it is money-saving because you do not have to go buy batteries.


  • Brand: Casio
  • Material: Plastic
  • Dimensions: 1×4×6 inches
  • Weight: 2.12 ounces
  • Power source: Solar


  • Has a more standard font
  • Lightweight and cute design
  • Solar works well; even in low light situations
  • Comes with a hard slide cover
  • Clearing buttons are marked in red.


  • Lose all memories once it runs out of light
  • Displays only one value at a time

#10. Texas Instruments TI-36X Pro Scientific Calculator

If you are a person who wants a scientific calculator with every possible engineering feature with a great user interface, then this can be a good choice for you. In fact, in my opinion, it is the best scientific calculator for engineering students. It's a perfect combination of sturdiness, good build quality, complete, user-friendly interface, super cool display, and excellent calculation abilities.


Four-line display: You can see and check all your calculations on its multiple-line display. This feature really helps during designing.

Dual Power Source - battery & Solar: You don't need to be worried about your power supply. The calculator will automatically be charged with the solar panel. It is the dual power supply that allows your device to be used for a long time.

MathPrint Mode: MathPrint option sets this calculator apart from the other calculators. This mode makes it dead easy to understand and enter calculus functions like integrals and derivatives. See math expressions, symbols, and stacked fractions exactly the way they appear in textbooks.

Case Include: This calculator has premium build quality. In addition, you will be provided with a classy case to protect your instrument.

Easy-to-use Mode Menu: This mode will help give you easy access to commands.


  • Brand: Texas
  • Calculator Type: Scientific
  • Dimensions (inches): 3.23" W ×. 75" D × 6.10" H
  • Weight: 113.4g
  • Key Type: Plastic
  • Display Type: 4-line × 16- digit, easier-to-read LCD display.
  • Power Source: Battery with Solar Cell Assistance


  • Easy to use.
  • Clear display.
  • Useful functions.
  • Light/compact
  • Long battery life


  • Silver keys are challenging to see.

Comparison Table of Engineering Calculators


Dimension (inches)


Power source

Helect 2-Line

6.3 × 3.3 ×. 8

2- Line 12 digit display


Casio FX-991EX

0.48 × 3.03 × 6.56

4-Line display

Solar + Battery


7.15 × 4.5 ×. 8

4-Line 16 digit display


Sharp EL-531TGBDW

3.1× 0.6 × 6.1

2-Line display

Solar + Battery

TI- Nspire CX CAS

7.28 × 0.59 × 3.15

3.3 inches backlit color display

Rechargeable battery


0.44 × 6.38 × 3.15

2-Line Textbook Display

Solar + Battery

Sharp EL501X2BWH

1.1× 8.5 × 5

1-Line display


RENUS 2-Line


2- Line Display


Casio FX 260 Solar ||

1 × 4 × 6

4-Line 16 digit display

Battery+ Solar

Sharp EL501X2BWH

1.1× 8.5 × 5

1-Line display


Scientific/Engineering Calculator Buyers Guide

Finding an engineering calculator is not an easy task. First, you should know, which are the essential functions you must need. Engineering calculators are mainly scientific because they cover an extensive syllabus of engineering courses.

Here are some key factors to lead you to choose the best scientific calculator for engineering.

Purpose of Using

If you are a teacher and want a calculator that shows you the solution step by step, you can go for a scientific calculator. A graphic calculator can show the correct result, but you need to explain it step by step.

Functions and Capabilities

Engineering, math, physics students require numeric functions for different calculations. From the lowest to the highest variant, calculators can perform 100-over 500 functions. Therefore, we recommend buying a calculator which fulfills all your requirements faster-processing capability.


The display is one of the significant factors in choosing a good calculator. It visualizes all your inputs and results. If you find the display doesn't meet your demand, don't go for it.

You will find various types of displays.

First, make sure your calculator's display is large enough with good resolution. Some calculators offer backlit display, which is helpful in low light and dark situations. If you want to go one step further, then go for color display. Know your preference and buy it.


The price to performance ratio is another crucial factor. You don't want to spend your money on an expensive but worthless calculator. To make the best use of your money, you must be concerned about which calculators are offering what in a specific price range.

Budget devices perform about 100-150 functions. But, a high-end advanced calculator can perform over 500 different functions. If you are a moderate user, then you don't want to spend money on expensive calculators meaninglessly.


Though storage is not a big deal for primary or moderate users, if you are an engineering student, buy a large storage space model. More RAM and ROM make your working experience better.

Frequently Asked Questions

1. Which model would be the best for solving complex problems at an affordable price?

Casio FX-991EX is would possibly the best choice at an affordable price for solving complex problems. This calculator can perform a lot of functions.

2. Is Casio FX-991EX allowed in the exam?

Casio FX-991EX is allowed in ESE. This calculator is non-programmable. UPSC says you can use a non-programmable calculator in exams. So, yes, you can use any non-programmable calculator in exams, including Casio FX-991EX.

3. What is the best graphing scientific calculator?

Without any doubt, The Texas Instruments Nspire CX CAS Graphing Calculator is probably the best graphing calculator you will find. Casio FX-991EX Engineering / Scientific Calculator could also be a good option comparatively at a cheap price.

4. Which is the best HP calculator for engineering?

HP 35s Scientific / Engineering Calculator is the best programmable calculator from HP. This RPN scientific engineering calculator can be a perfect choice for engineering students, professionals, and college students.

Final Words

A scientific calculator is must needed equipment in the field of engineering. For better understanding, bringing accuracy, there is no alternative.

We have narrowed it down to the eleven best engineering calculators. We hope you will find the above guide handy.

Leave a Comment