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Advanced Scientific Calculator For Engineering Comparison - April 2026
| 1 Best Choice  9.9Exceptional | 2 Best Value  9.6Exceptional | 3  9.3Excellent | 4  9.1Excellent | 5  9.0Excellent | 6  8.7Very Good | 7  8.6Very Good |
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ModelCasio FX-991ES Plus-2nd Edition Scientific Calculator | Model Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics | Model CATIGA SS-991EX Scientific Calculator with Advanced 550 Functions- Solar & Battery Powered, Multi-Function, High School & College Math, Trigonometry, Statistics, Algebra, Durable, Large Display | Model NEWYES Rechargeable Scientific Calculators 991ES MAX, 417 Functions, Writing Pad, Foldable Hard Case, 4-Line Written Display Advanced Calculators for Students School Engineering, Dual Power, Black | Model Scientific Calculator with Graph Functions for College and High School Students, Engineering, Advanced Mathematics, Calculus, Algebra, Geometery, Trigonometry, Statistics, Physics, Chemistry - Silver | Model Casio fx-991CW– Advanced Scientific Calculator with High-Res 4-Tone Display | Natural Textbook Display | 540+ Functions, Numeric Calculus, Matrix Solver | Ideal for Engineering, Science & Exams | Model Scientific Calculator with Graph Functions for College and High School Students, Engineering, Advanced Mathematics, Calculus, Algebra, Geometery, Trigonometry, Statistics, Physics, Chemistry - Black |
BrandCasio | Brand Casio | Brand CATIGA | Brand NEWYES | Brand Nadex | Brand Casio | Brand Nadex |
Reviews | Reviews | Reviews  | Reviews | Reviews | Reviews  | Reviews |
Tech Specs | ||||||
product dimensions6.38 x 3.03 x 0.43 inches | product dimensions 5.5 x 2 x 9 inches | product dimensions 6.46 x 3.15 x 0.1 inches | product dimensions 8 x 2 x 0.04 inches | product dimensions 11 x 2 x 0.1 inches | product dimensions 3.03 x 6.38 x 0.42 inches | product dimensions 11 x 2 x 0.1 inches |
item weight3.35 ounces | item weight 6.1 ounces | item weight 5.9 ounces | item weight 9.5 ounces | item weight 8.1 ounces | item weight 3.35 ounces | item weight 8.1 ounces |
batteries1 LR44 batteries required. included | batteries 1 LR44 batteries required. | batteries - | batteries 1 CR5 batteries required. included | batteries 1 LR44 batteries required. included | batteries 1 LR44 batteries required. included | batteries 1 LR44 batteries required. included |
Review | Review | Review - | Review - | Review - | Review - | Review - |
Available On  | Available On   | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.9
1CasioCasio FX-991ES Plus-2nd Edition Scientific Calculator
Why we love it
Intuitive Natural Textbook Display.
Comprehensive functions for diverse needs.
User-friendly and reliable.
Main highlights- Stylish design but same function as Casio FX-991ESPLUS 1st edition, 10-digit mantissa + 2-digit exponential display
- Redesigned ES PLUS series calculators featuring easy-to-understand Natural Textbook Display, Non-Programmable Scientific Calculator with 417 Functions
- Colour coded keypad for easy key differentiation, Simple and easy to use, Comes with new slide on hard case
- Basic Trigonometrical & Statistics Functions, and many more functions
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9.6
2Casio29% Off
Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics
Why we love it
Easy to use and portable.
Handles complex calculations efficiently.
Durable with a protective hard case.
Main highlights- SOLAR PLUS WITH BATTERY BACK-UP – Reliable power with energy-efficient Solar Plus technology and battery back-up to keep you working without interruption.
- OVER 280 FUNCTIONS – Includes advanced capabilities like complex number calculations, linear regression, summation (∑), integration (∫), permutations and combinations, polar-rectangular conversions, and matrix/vector operations.
- NATURAL TEXTBOOK DISPLAY℠ – View fractions, equations, and results exactly as they appear in your textbook, simplifying the interpretation of complex math.
- MULTI-REPLAY FUNCTION – Backtrack through your calculations, edit expressions, and recalculate answers step-by-step for easy error checking.
- EXTENSIVE SCIENTIFIC & MATH FUNCTIONS – Solve simultaneous equations, quadratic and cubic equations, and explore advanced topics and classes like Trigonometry, Pre-Calculus, Calculus I or II, Physics, Statistics, or other college-level courses.
- 16 digit 4 line LCD display
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9.3
3CATIGA
CATIGA SS-991EX Scientific Calculator with Advanced 550 Functions- Solar & Battery Powered, Multi-Function, High School & College Math, Trigonometry, Statistics, Algebra, Durable, Large Display
Main highlights- USER FRIENDLY FORMAT: Displays formulas and expressions as they appear in textbooks, simplifying learning and problem-solving. This feature ensures that complex equations are presented in a clear, structured manner, making it easier for users to follow along and verify their work, ultimately enhancing accuracy and understanding in both educational and professional settings.
- LARGE HIGH RESOLUTION SCREEN: The high-resolution LCD display is 32% larger than regular two-line calculators, showing intricate details ideal for advanced operations such as spreadsheets and 4x4 matrix calculations. The spacious screen allows graphs and equations to be displayed simultaneously, enhancing the clarity and precision of your work.
- DURABILITY and QUALITY: Engineered with strong materials, SS-991EX withstands extensive use, providing long-term reliability. If your calculator fails to turn on, try pressing the reset button on the back. For further issues, benefit from our 365-day limited warranty. Contact us, and we'll respond within 24 hours.
- DUAL POWER SOURCE: Features both solar power and a battery backup, guaranteeing continuous performance for crucial calculations, making it reliable and efficient for use in any environment.
- 552 FUNCTIONS SCIENTIFIC CALCULATOR: Includes spreadsheet, matrix calculations, statistics, calculus, complex number calculations, equation calculations, standard deviation, vector calculations, permutations and combinations. Perfect for Advanced and Beginner courses including Biology, Chemistry, Physics, Finance and Business.
Our ranking system
At bestchoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.
Features
Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.
Consumer Reviews
We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.
Popularity
Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.
Value for money
AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
