# Scientific Calculator Casio fx-991DE CW Pocket 12 Digits Black

**URL:** https://aio.lv/en/product--casio-fx-991de-cw--8771900
**Data updated:** 2026-01-13 21:31 (EET)
**Category:** Calculators
**Manufacturer:** CASIO
**Manufacturer code:** FX-991DE CW
**EAN:** 4549526615580
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 38.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 31.81 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--casio-fx-991de-cw--8771900

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

The Casio fx-991DE CW is a pocket scientific calculator featuring 12 digits, a currency converter, and battery power. Its compact design makes it ideal for students and professionals alike, providing essential functions for mathematics, science, and engineering calculations.

## Long description

The Casio fx-991DE CW Pocket scientific calculator is a compact, battery-powered device with a 12-digit display designed for everyday calculations in mathematics, science and engineering. Its small form factor fits easily into a pocket or pencil case while providing essential scientific functions, a currency converter and straightforward numeric input for quick results. The calculator supports common scientific operations and offers a clear display suitable for study, homework and on-the-go problem solving.
Advantages
The calculator combines a 12-digit LCD with battery power for reliable operation without dependence on solar light. A built-in currency converter simplifies basic currency calculations while numerous scientific functions cover trigonometry, logarithms, powers and roots. Its compact and lightweight housing ensures easy portability and everyday durability. The user interface is designed for clear key labeling and simple entry, reducing input errors during exams or fieldwork.
Suitable for
 School and university mathematics courses
 Engineering and physics problem solving
 Everyday technical calculations and conversions
 Exam practice and homework tasks
Key specifications
 Display: 12-digit LCD screen for numerical output
 Power source: battery powered for consistent operation
 Functions: scientific functions including trigonometric, logarithmic, exponential, powers and roots
 Special feature: integrated currency conversion capability
 Form factor: pocket-sized, lightweight handheld design
 Input: standard scientific keypad with clearly labeled keys
How to use
Turn the calculator on with the power key and enter numbers using the keypad. Select scientific functions via the labeled function keys and use the mode key to switch between calculation types where applicable. For currency conversion, enter the amount and follow the currency conversion key sequence provided in the user reference. Results appear on the 12-digit display and can be reviewed or edited using the clear and backspace keys. Routine battery replacement is straightforward and described in the device manual.
Usage recommendations
Store the calculator in a protective case when not in use to avoid key wear and screen scratches. Replace the battery before it becomes too weak to ensure accurate results, and consult the manual for permitted functions during formal exams to ensure compliance with testing rules.

## Specifications

| Feature | Value |
|---|---|
| Type | Scientific |
| Weight | 0.095 kg |
| Form factor | Pocket |
| Power source | Battery |
| Height | 77 mm |
| Width | 10.7 mm |
| Depth | 162 mm |
| Product colour | Black |
| Digits | 12 digits |
| Built-in capability | No |
| Control type | Buttons |
| Ergonomic design | No |
| Built-in processor | No |
| Display tilting | No |
| Currency converter | Yes |
| Display type | LCD |
| Symbolic notation | Square root, Pi, Fraction |
| USB port | No |
| Cover | Yes |

## FAQ

### How much does the Scientific Calculator Casio fx-991DE CW cost, and is it available for purchase?

The price is 38.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 16 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 29.06.2026 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/8771900/59516025_large.webp