Top 10 Best Scientific Calculators for Engineers (Reviews & Buyers’ Guide 2021)

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CASIO FX-991ES PLUS Scientific Calculator
  • Best scientific calculator for engineers and engineering students
  • Drop-resistant body and wear-resistant printing
  • Comes with an easy-to-read natural textbook display and a slide-on hard case
Our Rating: 5.0/5.0
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#1-Top Expert Choice
Texas Instruments TI-30X IIS Scientific Calculator
  • One of the most affordable scientific calculators for engineers
  • With a 2-line display and entry-scrolling feature
  • Allows viewing of previous entries
Our Rating: 4.9/5.0
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#2-Premium Choice
Casio FX-991EX Engineering/Scientific Calculator
  • Best scientific calculator for the money
  • Generates QR codes of calculations
  • Features spreadsheet and 4x4 matrix applications
Our Rating: 4.8/5.0
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#3
HP 35s Scientific Calculator
  • Offers algebraic entry-system logic and RPN options
  • Features keystroke programming, 100 built-in functions, 30 KB memory, and 800+ independent storage registers
  • 2-line, 14-character LCD with adjustable contrast
Our Rating: 4.7/5.0
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#4
CATIGA CS121 Scientific Graphing Calculator
  • Modern operating system allows for graphing and scientific functionalities
  • 3 programmable modes (display, calculation, and angular measurement)
  • Has over 280 functions
Our Rating: 4.5/5.0
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#5
RENUS 2-Line Engineering Scientific Calculator (8-Pack)
  • Includes 8 affordable engineering calculators, sliding covers, and 16 AAA batteries
  • Energy-saving auto-shutdown feature
  • Replay key to eliminate the need for re-entering equations
Our Rating: 4.4/5.0
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#6
Casio FX-300ES PLUS Scientific Calculator
  • Cheapest, best scientific calculator for engineers
  • Comes with over 200 functions
  • With 9 constant memory locations and multi-replay function
Our Rating: 4.3/5.0
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#7
Sharp EL-W516TBSL Advanced Scientific Calculator
  • Best scientific calculator for weight(super lightweight)
  • 4-line, 16-digit LCD display
  • Features 7 modes
Our Rating: 4.2/5.0
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#8
Texas Instruments TI36X Pro Scientific Calculator
  • Easy-to-read 16-digit MultiView display and MathPrint
  • One of the best engineering calculators to use for the FE exam
  • Toggle key allows for quick conversion between square roots, decimals, and fractions
Our Rating: 4.0/5.0
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#9
Sharp EL-W516XBSL 556 Scientific Calculator
  • 4-line display with WriteView technology
  • Over 530 advanced scientific and mathematical functions
  • 7 modes and 4 programmable keys
Our Rating: 3.9/5.0
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#10

View the Best Scientific Calculators for Engineers & Engineering Students Below:

1. CASIO FX-991ES PLUS Scientific Calculator

There’s a reason why the CASIO FX-991ES PLUS Scientific Calculator is the best scientific calculator for engineers, and it’s not just because of its slim, lightweight design. Customers can attest to the fact that this calculator goes above and beyond solving construction math problems—all at an affordable price.

What makes the CASIO FX-991ES PLUS Scientific Calculator our top pick for the best scientific calculators because it offers a whopping 417 functions, which support statistical trigonometry, logarithmic, base-n calculations, and more.

With a natural textbook display, it lets you read off numbers and calculations in a faster and easier way. Plus, its cursor keys and function keys are highly visible and easy to press. That makes this scientific calculator great for when you need solutions right off the bat, especially in the midst of a busy construction project.

At about half an inch thick, this scientific calculator eliminates the need to bring bulky calculators to the office, job site, or school. It perfectly fits in bags and laptop case pockets!

And you don’t have to worry about it getting damaged as you travel. It comes with a detachable hard case that can be attached in either direction. Plus, this scientific calculator is drop-resistant and features wear-resistant printing. That means when you buy the best scientific calculator this 2021, you’re buying it for life.

Includes CASIO FX-991ES PLUS scientific calculator, slide-on hard case, and LR44 battery
Dimensions (L x W x H) 6.34 x 3.15 x 0.47 inches
Display Natural textbook, LCD
Color White
Weight 3.7 ounces
Power source Solar and battery
Warranty 3-year limited warranty
2. Texas Instruments TI-30X IIS Scientific Calculator

Be it analytic geometry, advanced calculus, or advanced trigonometry, your construction math problems can all be solved with the Texas Instruments TI-30XIIS Scientific Calculator. Users like the fact that such a small, lightweight device offers tons of functions and seems to be sturdy and well-designed as well.

Combining statistics with advanced scientific functions, this calculator works great for engineers, students, and other professionals. And even if you entered the most complex calculations, its two-line display lets you easily view and scroll through your entries at the top and results at the bottom.

When you can’t seem to find the answer you’re looking for, you can also look for patterns through your entries as this calculator allows you to view your previously entered data.

One of the cheapest and best scientific calculators, the Texas Instruments TI-30XIIS gives you a lot of convenient features for the job without the need to break the bank.

Includes Texas Instruments TI-30XIIS Scientific Calculator and lithium metal battery
Dimensions (L x W x H) 6.10 x 3.20 x 0.74 inches
Display LCD
Color Blue
Weight 6.16 ounces
Power source Solar and battery
Warranty 1-year limited warranty
3. Casio FX-991EX Engineering/Scientific Calculator

Are the CASIO FX-991ES PLUS calculator’s functions not enough for the job? Then get ahold of the Casio FX-991EX Engineering/Scientific Calculator. It has 552 functions for the most advanced calculations, letting you work through various construction math problems on-site.

While the Casio FX-991EX is the third best scientific calculator for engineers, it offers features that are more than enough for the project. Unlike other calculators, this one can generate QR codes of your formulas. Once you can scan a QR code with your phone, it shows a graphical representation of your data—a convenient feature for sharing data with your colleagues or students.

Need to view a spreadsheet of your collected data on the job site? Not a problem. This scientific calculator’s LCD technology can display calculations and other data in both spreadsheet and 4x4 matrix modes.

What users like about this scientific calculator is that it’s an affordable choice for a non-programmable calculator, which makes it one of the best engineering calculators for on-site calculations and even for land surveying tests and other exams.

Includes CASIO FX-991EX engineering/scientific calculator and LR44 battery
Dimensions (L x W x H) 6.5 x 3 x 0.4 inches
Display LCD
Color Black
Weight 7.1 ounces
Power source Solar and battery
Warranty 3-year warranty
4. HP 35s Scientific Calculator

Your ultimate pocket-sized companion for calculating on-site, the HP 35s Scientific Calculator marries flexibility with high-performing functionality. While it’s one of the best scientific calculators for engineers and engineering students, it’s also designed for professionals in various industries, such as surveying, medicine, science, and more.

Despite the invention of calculator mobile apps and desktop programs, users consider the HP 35s Scientific Calculator a pretty handy tool for the modern age. They like its quick response, excellent tactile experience, and the options between algebraic entry-system logic and reverse Polish notation (RPN).

Aside from the fact that this engineering calculator is designed for today’s professionals, it also features 100 built-in functions, 30 KB of memory, and over 800 independent storage registers, which can handle the most complex workloads. What’s more, it’s built to be programmable with its keystroke programming, letting you save time on entering your frequently used equations.

For a more comfortable way of viewing equations and results, this scientific calculator comes with a 2-line, 14-character LCD screen with adjustable contrast. So even if you’re working under the sun, you can easily check and recheck your data to avoid costly errors.

Given all this, the HP 35s Scientific Calculator is, without a doubt, one of the best engineering calculators that can improve the efficiency and accuracy of any job.

Includes HP 35s scientific calculator, 2 batteries, premium protective case, and user's manual
Dimensions (L x W x H) 6.22 x 3.23 x 0.72 inches
Display LCD
Color Black
Weight 4.4 ounces
Power source 2 LR44 batteries
Warranty 1-year limited warranty (may vary by region)
5. CATIGA CS121 Scientific Graphing Calculator

Graphing results, along with points and coordinates, is one of the most accurate ways to find out the value of an equation. And the best scientific calculator for the job? The CATIGA CS121 Scientific Graphing Calculator.

What this scientific calculator does is that it lets you generate, zoom, and trace graphs with its built-in templates. Besides that, its scientific functions and converters are an instant customer-favorite feature. These scientific functions allow you to convert between binary, decimal, octal, and hexadecimal entries, among others—perfect for computer and electrical engineers.

Another convenient feature of this scientific calculator is that it offers three programmable modes: display mode, calculation mode for general arithmetic, and angular measurement mode to calculate for grades, degrees, and radiants.

These programmable modes can no doubt help boost the efficiency of tasks that require calculations. That comes in pretty handy for any busy contractor, land surveyor, and other construction professionals!

All in all, this scientific calculator features over 280 functions, great for solving the most complex construction math problems.

Includes CATIGA CS121 Scientific Graphic Calculator and LR44 battery
Dimensions (L x W x H) 7.12 x 4.5 x 0.8 inches
Display LCD
Color Black
Weight 4.8 ounces
Power source Battery
Warranty 1-year limited warranty
6. RENUS 2-Line Engineering Scientific Calculator (8-Pack)

Need an extremely budget-friendly scientific calculator? Go ask your colleagues or students if they need some too and get the RENUS 2-Line Engineering Scientific Calculator (8-pack). It includes 8 of some of the best scientific calculators for engineers—and you can have them all at a price of one.

With its large screen and two-line display, it’s easy to read off results and enter calculations. This RENUS scientific calculator also offers 240 convenient features for professional engineers and students. So whether you’re calculating for degrees, minutes, seconds, or fractions, you can have instant, easy-to-view results in a flash.

This scientific calculator package conveniently includes sliding covers and 16 AAA batteries. And you don’t have to worry about easily draining these batteries. Because this scientific calculator comes with an auto-shutdown feature, it automatically turns off after 5 minutes of inactivity, thus saving more battery life.

In case you accidentally delete your entries or enter the wrong formula, there’s no need to re-enter or delete your data. This scientific calculator features a replay key, which lets you go back and change the variables of your equation.

Time-saving and energy-efficient, the RENUS 2-Line Engineering Scientific Calculator (8-pack) is one of the best scientific calculator packages for your engineering team or class.

Includes 8 RENUS 2-Line Engineering Scientific Calculators, sliding covers, 16 AAA batteries, and user manual
Dimensions (L x W x H) 6.1 x 3.3 x 0.6 inches
Display LCD
Color Black
Weight 4.64 ounces
Power source Battery
7. Casio FX-300ES PLUS Scientific Calculator

One of the cheapest scientific calculators on the market, the Casio FX-300ES PLUS offers all of the necessary functions for engineering mathematics at a pretty low price.

Users particularly love how it doesn’t have the complexity of excessive buttons or multi-tier menus. This calculator for engineers works great for anyone who needs a simple calculator packed with the right features for the job.

Need a calculator that’s approved for fundamentals of engineering (FE) or land surveying exams? This scientific calculator can let you ace the test with ease. Approved for use in most exams, it comes with a large multi-line natural textbook display, which is as easy to see as the expressions on your textbook.

With over 200 functions, including statistics, linear regression, combinations, permutations, simplified fractions, roots, and more, you can surely find the solution to any construction math problems. This calculator for engineers also comes equipped with a repeating decimal display, nine constant memory locations, and a multi-replay function for editing equations.

Includes Casio FX-300ES PLUS Scientific Calculator and LR44 battery
Dimensions (L x W x H) 9 x 5.5 x 1 inches
Display Natural textbook, LCD
Color Pink
Weight 6.9 ounces
Power source Solar and battery
Warranty 1-year limited warranty
8. Sharp EL-W516TBSL Advanced Scientific Calculator

With over 640 functions, seven modes, and a stylish protective hard case, the Sharp EL-W516TBSL Advanced Scientific Calculator might just be the only calculator you’ll ever need for life. Easily a favorite among engineers and students, users like this calculator’s storage for constants, test-approved design, and features that are uncomplicated to use.

An indispensable calculator for engineers and engineering students alike, the Sharp EL-W516TBSL features seven modes: normal, drill, complex, stat, list, matrix, and equation. It lets you program constants and eliminates the need for re-typing digits—convenient for use in exams or in the field.

Another thing that makes the EL-W516TBSL one of the best engineering calculators out there is that it comes with a large LCD display, which can show four lines or 16 digits. No need to scroll through lengthy equations. This calculator can display them completely!

Some other convenient features that this calculator for engineers has to offer include a home key, solvers for quadratic and cubic equations, and three variable linear equation solvers. And to top it all off, it’s the most lightweight calculator on this list, weighing at a mere 0.24 ounces. So bring it with you to the job site or school—it’s so lightweight that you’ll barely notice that it’s in your bag.

Includes Sharp EL-W516TBSL Advanced Scientific Calculator, protective hard case
Dimensions (L x W x H) 6.6 x 3.1 x 0.6 inches
Display WriteView, LCD
Color Black and silver
Weight 0.24 ounces
Power source Solar and battery backup
Warranty 1-year warranty
9. Texas Instruments TI36X Pro Scientific Calculator

With its convenient shortcuts and advanced functions, the Texas Instruments TI36X Pro Scientific Calculator has everything that any professional engineer or student needs.

Customers use this to get results in engineering notation for radio-frequency circuits and polar coordinates. Some even recommend the TI36X Pro as one of the best engineering calculators to use for the FE exam.

While the TI36X Pro Scientific Calculator doesn’t come with graphing functions, it lets you input data, make edits, and scroll through entries as you would normally do with a graphing calculator.

Easily see multiple calculations at a time or view math expressions and stacked fractions like they’re on your textbook—its 16-digit MultiView display and MathPrint feature lets you do just that.

To further prove how convenient it is to use, this calculator for engineers has a toggle key, which converts between square roots, decimals, and fractions.

Includes Texas Instruments TI36X Pro Scientific Calculator and CR2 battery
Dimensions (L x W x H) 9.7 x 6.5 x 1.4 inches
Display LCD
Color Black
Weight 6.4 ounces
Power source Battery
Warranty 1-year warranty
10. Sharp EL-W516XBSL 556 Scientific Calculator

Last but certainly not least is another must-have calculator for engineers and engineering students. With over 530 advanced functions, the Sharp EL-W516XBSL 556 Scientific Calculator offers the right solution to every construction math problem.

But that’s not all, it features an equation solver that lets you solve three different equations at a time. It also offers seven modes and four programmable keys, making it quick and easy to enter your frequently used calculations.

What customers particularly like about this calculator for engineers is its “change” button. With a simple press of that button, the calculator will instantly display results in fraction, decimal, or reduced fraction modes.

Built with WriteView technology and a large four-line display, viewing equations and results will just be a breeze—convenient for calculating outdoors. Plus, this engineering calculator includes a playback feature, allowing you to edit formulas with the utmost ease.

Includes Sharp EL-W516XBSL 556 Scientific Calculator and CR123A battery
Dimensions (L x W x H) 3.1x 6.4 x 0.6 inches
Display LCD
Color Black and silver
Weight 3.6 ounces
Power source Solar and battery
Warranty 1-year warranty