# Scientific calculator CASIO ClassWiz fx-991CW — 252 functions, 2D/3D graphing

**URL:** https://aio.lv/en/product--casio-161504--11590539
**Data updated:** 2026-02-15 18:41 (EET)
**Category:** Calculators
**Manufacturer:** CASIO
**Manufacturer code:** 161504
**EAN:** 4549526615764
**Warranty:** 3 Years
**Availability:** Available for order
**Price:** 51.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 42.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--casio-161504--11590539

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

CASIO ClassWiz fx-991CW is a scientific/function calculator offering 252 functions and the ability to display 2D and 3D graphs. It is designed for complex calculations in mathematics, engineering and science, supporting algebraic, trigonometric and statistical operations. Practical for students and professionals who need precise computation and graphical visualization.

## Long description

CASIO ClassWiz fx-991CW is a scientific calculator with an extensive set of built-in functions and graphing capabilities. Designed for mathematical, engineering and scientific tasks, it provides numeric computation, symbolic support for algebraic expressions, and the ability to display 2D and 3D graphs on a clear high-resolution display. The calculator supports trigonometrical, logarithmic, exponential and statistical operations, and is intended for use in classrooms, labs and fieldwork where precise calculations and visualisation of functions are required.
Advantages
The CASIO ClassWiz fx-991CW combines a compact form factor with a high-resolution screen that improves visibility of formulas and graphs. It offers a broad set of 252 functions covering arithmetic, algebra, calculus, matrices and statistics, and provides 2D/3D graphing to visualise relationships and solutions. The interface is built for straightforward entry of expressions and conversion between display formats, while the calculator’s calculation engine is optimised for reliable numerical results across a wide range of problems.
Suitable for
 High school and university students studying mathematics, physics or engineering
 Engineers and technicians performing calculations and visual checks of functions
 Laboratory work requiring statistical analysis and data processing
 Teachers preparing examples and demonstrations of mathematical concepts
Key specifications
 Number of functions: 252 built-in functions covering algebra, calculus, trigonometry and statistics
 Display: high-resolution LCD capable of rendering 2D and 3D graphs and multi-line expressions
 Graphing: 2D and 3D plotting for functions and parametric representations
 Calculation modes: numeric, fraction, complex numbers, matrices and vector operations
 Statistical features: regression analysis, standard deviation, permutations and combinations
 Power supply: integrated battery and energy-efficient operation
 Form factor: portable handheld design with tactile keypad for reliable input
How to use
Enter expressions directly using the keypad and confirm operations with the execute key to obtain immediate results. Switch between calculation modes via the mode menu to handle fractions, complex numbers, matrices or statistics as needed. For graphing, select the graph function, input the desired function or parametric equations, and use the navigation keys to adjust axes and view 2D or 3D representations. Use the memory and replay features to edit previous entries and perform stepwise calculations.
Usage recommendations
For classroom and exam environments, verify permitted features beforehand; when preparing coursework or demonstrations, use the graphing mode to illustrate function behaviour and combine statistical functions with matrix operations for data analysis. Maintain the calculator clean and replace batteries according to usage to ensure consistent display performance.

## FAQ

### How much does the CASIO ClassWiz fx-991CW scientific calculator cost, and is it available for purchase?

The price is 51.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 01.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All CASIO products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized CASIO service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11590539/68546025_large.webp