Description
Reviews
| Brand | - |
| Category | Stationery, Educational Electronics & Office Supplies / Calculators |
| Origin | - |
| Brand | CASIO |
| Model Number | fx-991CN X (2026 New Model) |
| Display Type | High-resolution LCD with Natural Textbook Display |
| Language Interface | Simplified Chinese |
| Power Source | Solar Panel + Button Battery (LR44) |
| Functions Count | 552+ Integrated Functions |
| Exam Compliance | Approved for Gaokao and Graduate Entrance Exams |
| Dimensions | 165.5 x 77 x 11.1 mm |
| Weight | Approx. 105g (including battery) |
| Warranty | 1 Year Manufacturer Warranty |
Anonymous
Mar 31, 2026
Rating: 5/5
Perfect for Gaokao Preparation
This calculator is exactly what I needed for my high school exams. The Chinese interface makes it very easy to navigate complex functions, and the screen is crisp and clear even in bright light.
Anonymous
Mar 29, 2026
Rating: 5/5
Upgrade from the old 991ES
The new 2026 model feels much more responsive. The menu system is intuitive, and solving matrix equations is significantly faster than on my old calculator. Highly recommended for engineering students.
Anonymous
Mar 28, 2026
Rating: 5/5
Genuine Product, Fast Shipping
Verified the serial number on the Casio website, and it is 100% genuine. The packaging was secure, and the calculator came with a protective hard case. Very satisfied with this purchase.
Anonymous
Mar 20, 2026
Rating: 4/5
Good value for the price
Does everything advertised. The solar charging works well, so I haven't had to worry about battery life. Only minor issue is that the manual could be more detailed for advanced statistical features.
Anonymous
Mar 07, 2026
Rating: 4/5
Great features, slight learning curve
The functionality is incredible for physics competitions. It took me a day to get used to the new icon-based menu, but once I did, calculations became effortless. The build quality is solid as expected from Casio.
Anonymous
Mar 04, 2026
Rating: 5/5
Essential for College Math
I bought this for my calculus and statistics courses. The ability to solve integrals and display results in natural textbook format saves me so much time during homework and exams.
Q: Can the language be switched to English?
A: No, this specific model is the Chinese version (CN X) and the system language is fixed to Simplified Chinese. Please look for the international 'EX' series if you require an English interface.
Q: Is this calculator allowed in the Chinese Gaokao exam?
A: Yes, the fx-991CN X is fully compliant with Gaokao regulations as it does not have graphing capabilities or programmable memory that violates exam rules.
Q: How do I reset the calculator if I make a mistake in settings?
A: You can perform a full initialization by pressing [SHIFT] -> [9] (Reset) -> [3] (All Data) -> [Yes]. This will restore all factory defaults.
Q: Is this the 2026 new model or an older version?
A: This is the latest 2026 new model (fx-991cncw), featuring updated processing speed and an improved high-resolution display compared to previous generations.
Q: Does it come with a protective case?
A: Yes, the package includes a durable slide-on hard case designed specifically for the fx-991CN X to protect the screen and buttons.
Adjustable Height Simple Storage Shelf - Wooden and Iron Bookcase, Steel-Wood Supermarket Display Rack
$256.00
DIY Handmade Soap Mold - Carnation Flower Rectangular Silicone Mold for Homemade Soap, Mother's Day Gift
$14.30
Fried Chicken Warmer Cabinet with Heat Lamp Small Single-Layer Insulated Box for Pies Youtiao Chestnuts and Roasted Sweet Potatoes Display Case
$500.00
Dried & Preserved Flower DIY Kit for Scented Candles – Ocean Style for Festivals, Team Building, and Workshops
$6.83
304 Stainless Steel Chain, Thickened Industrial Seamless Short/Long Link Chain for Lifting, Swing, or Dog Leash
$1.50
Large Bucket 502 Glue, Strong Instant Adhesive, Gold Material 502 Dry Glue for Leather, Metal, Furniture, and Plastic Bonding by Manufacturer
$1,893.00
Rectangular Plastic Vegetable Planter for Balcony - Durable Home Gardening Pot
$12.90
Chinese Painting Line Drawing Copybook, Gongbi Sketch Template, Large-Scale Tracing Album, Ancient Style Brush Control and Line Practice Book
$7.48
German Continental Tires 225/45R17 Run-Flat, 19-Inch Original Authentic with Full Tread Patterns
$380.00
Dynamic Sheet Music Simplified Notation Accompaniment for Electric Wind Instrument Saxophone Hulusi Ocarina Flute Bamboo Flute
$10.00
LL Industrial Lint-free Wiping Paper - Oil and Water Absorbent Non-woven Fabric (White/Blue Large Roll)
$185.82
Continental Quiet Used Car Tires 225/235/245/255/265-35/40/45/50 R17/18/19/20/21/22/23
$284.00
Negotiable Price: Siemens Load Cell 7mh4106-5ec11, Brand New Unused, Contact for Price Negotiation
$1,332.00
Premium Over-Toilet Storage Organizer, Wall-Mounted Bathroom Shelf, No Drilling Required, Multi-Function Toilet Rack
$31.76
Model 2000 Large Commercial Vegetable Cutter for Slicing, Dicing, and Cutting Leafy Greens and Kimchi
$11,000.00
Aromatherapy Candle Tool Set - Includes Igniter, Snuffer, Wick Trimmer, Flame Extinguisher Cover, and Rotating Carousel Ornament
$2.55
onlycook 304 Stainless Steel Kitchen Rack with Narrow Edge for Sink, Dishcloth Drainer, and Sponge Basket
$36.50
7-Piece Square Succulent Pot Set with Trays - Durable Plastic Colorful Root-Control Planters
$75.50
Minimalist Japanese Style Kitchen Sponge Brush Dish Soap Drain Rack Air-Dry Cloth Rack Sink Organizer Box
$21.00
PVC Cable Cover and Rubber Wire Duct, Speed Bump Style Wire Protector for Indoor Electrical Cables and Water Pipes
$9.10
Spiegel BGF-161 Portable Tire Stone Removal Hook - Multi-function Tool for Cleaning Car Tire Treads
$7.84
7A Natural Amethyst Purple Rabbit Hair Loose Beads for Women's DIY Bracelets and Snowflake Necklaces
$3.83
DIY Handmade Soap Silicone Mold, Essential Oil Soap, Creative Gift Soap Base and Aromatherapy Materials, Love Forever Design
$12.90
Flameless Aromatherapy Diffuser with Essential Oils, Dried Flowers, and Preserved Flower Decor
$13.60
DOUBLECOIN 7.00R16LT-14 (RSS2) All-Steel Radial Truck Tire - Economical and Wear-Resistant
$1,375.00
Tactical Laser Flashlight, Super Bright Rechargeable Mini Portable Light for Outdoor Long-Range Use, Home Multi-Function Zoom
$339.22
![MOOCAT [Polaroid Style] Hand-drawn Blank Irregular Wood Pulp Fine-grain Paper for Cyanotype, Street Vending, and Art Projects](https://www.gosteppe.com/cache/small/product/270441/legacy-main-3390792413846e9dfc410750.webp)
MOOCAT [Polaroid Style] Hand-drawn Blank Irregular Wood Pulp Fine-grain Paper for Cyanotype, Street Vending, and Art Projects
$11.90
New Pearl Mini Watercolor Solid Set – Portable Travel Sketchbook & Palette Kit for Students, 12 Colors with Magnetic Transparent Case
$5.78
Natural Cream-Body Green Rutilated Quartz Loose Beads - DIY Handmade Beading Accessories including Spacer Beads and Multi-Gem Bracelet Components
$5.25
Fresh Milk Beverage Production Equipment – Small Pasteurization Tank & Fermented Liquid Yogurt Tank
$6,580.00
![[10 Boxes] M&G Staples 24/6 Universal No. 12 Stapler Pins, Uniform Binding Nails, Office Stationery, Small Stainless Steel Staples](https://www.gosteppe.com/cache/medium/product/393106/legacy-main-d2d0aeb221cb42ffcbb9d83a.webp)
![[Customizable] Blank DIY Bookmarks - Thickened Hard Cardstock in Multiple Sizes with Tassels for Kindergarten and Elementary Art, Calligraphy, and Reading Gifts](https://www.gosteppe.com/cache/medium/product/386159/legacy-main-05a2e5e73e5ac60017fbef5e.webp)
