--- product_id: 258273829 title: "Casio Scientific Calculator [FX-991MS]" brand: "casio" price: "€ 1.54" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.fi/products/258273829-casio-scientific-calculator-fx-991ms store_origin: FI region: Finland --- # 2-line dot matrix display Two-way power 401 functions Casio Scientific Calculator [FX-991MS] **Brand:** casio **Price:** € 1.54 **Availability:** ✅ In Stock ## Summary > 🔢 Elevate your calculations, own the numbers game! ## Quick Answers - **What is this?** Casio Scientific Calculator [FX-991MS] by casio - **How much does it cost?** € 1.54 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/258273829-casio-scientific-calculator-fx-991ms) ## Best For - casio enthusiasts ## Why This Product - Trusted casio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Master 401 Functions:** Unlock advanced calculations from integration to regression analysis with ease. - • **Dual Power Efficiency:** Solar + battery combo ensures uninterrupted performance wherever you work. - • **Lightweight & Sleek Design:** Slim, portable, and professional—perfect for on-the-go managers and students alike. - • **Crystal Clear 2-Line Display:** View expressions and results simultaneously for error-free calculations. - • **Comprehensive Statistical Tools:** From standard deviation to permutation, handle complex data confidently. ## Overview The Casio FX-991MS is a lightweight, dual-powered scientific calculator featuring a 2-line dot matrix display and 401 versatile functions including integration, matrix, and statistical calculations. Designed for professionals and students, it combines precision with portability, backed by Casio’s trusted brand reliability. ## Description Features: Two way power 401 Functions Dot Matrix 2-Line Display 10+2 Digits Plastic Keys Multi-replay function , Matrix calculations , Equation calculations , Vector calculations , Differential calculations , SOLVE function Other Features: 2-line display Fraction calculations Integration calculations Combination and Permutation Statistics (STAT-data editor, Standard deviation, Normal distribution calculations, Regression analysis) Base-n calculations / conversions Logical operations Complex number calculations CALC memory Engineering symbol calculations 40 scientific calculations 40 metric conversions(20 conversion pairs) 9 variable memories Comes with slide-on hard case Review: best at this price - It's totally legidimate Casio product. Its not fake at all you can see it on Casio's website. This is the best calculator for all the engeneering students recommend by all the professor. Personally between the old one and the new , I like this one , it's lighter , slimmer , and looks good . Thought it's not as good as Texas instruments calculator , but from a students point of view (price is the main concern) this is the best. I would totally recommend this for 11th,12th science and engineering students. I used it in some exams, obviously the invigilators lack knowledge and you need to convince that the calculator is allowed. However this calculator is easy to use and has variety of functions. You just need to go through the manuals in order to perform various operations. It is very light (when not in sliding cover). Just go for it. You may buy the ES version as it has better display. But you will br satisfied by this only. Review: Casio non tradisce. - Calcolatrice ottima e ottimo il rapporto qualità prezzo. Consegna puntuale. Adatta sia per scuole superiori che corsi universitari. Lo consiglio ## Features - 2-line display - Fraction calculations - Integration calculations - Combination and Permutation - STAT-data editor, Standard deviation, Normal distribution calculations, Regression analysis ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0000VILI2 | | Best Sellers Rank | #61,412 in Office Products ( See Top 100 in Office Products ) #139 in Scientific Calculators | | Brand | Casio | | Calculator Type | Engineering/Scientific | | Color | Black | | Colour | Black | | Compatible Devices | [Many] | | Customer Reviews | 4.4 out of 5 stars 1,225 Reviews | | Display Type | LCD | | Enclosure Material | Plastic | | Global Trade Identification Number | 00079767469085, 04971850094654 | | Item Weight | 0.11 Kilograms | | Manufacturer | Casio | | Mfr Part Number | FX-991MS | | Model Name | fx-991MS | | Model Number | FX-991MS | | Number of Batteries | 1 LR44 batteries required. | | Number of batteries | 1 LR44 batteries required. | | Power Source | Battery | | Power source | Battery | | Screen Size | 10 Centimeters | | Screen size | 10 Centimeters | | UPC | 802710712231 802299205063 079767134860 079767469085 | ## Product Details - **Brand:** Casio - **Calculator Type:** Engineering/Scientific - **Colour:** Black - **Power source:** Battery - **Screen size:** 10 Centimeters ## Images ![Casio Scientific Calculator [FX-991MS] - Image 1](https://m.media-amazon.com/images/I/61UyMkNTffL.jpg) ![Casio Scientific Calculator [FX-991MS] - Image 2](https://m.media-amazon.com/images/I/611N4RThvhL.jpg) ![Casio Scientific Calculator [FX-991MS] - Image 3](https://m.media-amazon.com/images/I/615Yi6oM2HL.jpg) ![Casio Scientific Calculator [FX-991MS] - Image 4](https://m.media-amazon.com/images/I/61HVCf2xFKL.jpg) ![Casio Scientific Calculator [FX-991MS] - Image 5](https://m.media-amazon.com/images/I/714oWtnZuyL.jpg) ## Questions & Answers **Q: Does casio fx-991 ms plus made in china or other country ?** A: china **Q: Does casio fx-991 ms plus made in china or other country ?** A: made in china ## Customer Reviews ### ⭐⭐⭐⭐⭐ best at this price *by K***H on 1 September 2019* It's totally legidimate Casio product. Its not fake at all you can see it on Casio's website. This is the best calculator for all the engeneering students recommend by all the professor. Personally between the old one and the new , I like this one , it's lighter , slimmer , and looks good . Thought it's not as good as Texas instruments calculator , but from a students point of view (price is the main concern) this is the best. I would totally recommend this for 11th,12th science and engineering students. I used it in some exams, obviously the invigilators lack knowledge and you need to convince that the calculator is allowed. However this calculator is easy to use and has variety of functions. You just need to go through the manuals in order to perform various operations. It is very light (when not in sliding cover). Just go for it. You may buy the ES version as it has better display. But you will br satisfied by this only. ### ⭐⭐⭐⭐⭐ Casio non tradisce. *by C***N on 18 December 2016* Calcolatrice ottima e ottimo il rapporto qualità prezzo. Consegna puntuale. Adatta sia per scuole superiori che corsi universitari. Lo consiglio ### ⭐⭐⭐⭐⭐ Producto de segunda mano en perfecto estado *by M***O on 4 September 2018* Valoración muy positiva en cuanto al estado del producto, ya que tratándose de un artículo usado de segunda mano nunca sabes lo que te vas a encontrar. El estado es perfecto y casi me atrevería a decir que no parece haber sido usado. La caja del producto estaba dañada pero solo la caja. El artículo de su interior estaba intacto. Valoración negativa en cuanto al servicio de entrega por parte de correos express. El día que esperaba el artículo estuve en el punto de entrega durante todo el día. Al ver que no se producía la entrega contacté por internet con la página web de correos express para hacer un seguimiento del artículo y sorprendentemente habían escrito que la entrega no había podido hacerse por no encontrarse el receptor en el punto de entrega y no haber podido contactar conmigo mediante llamada al móvil de contacto. Pues bien ambas afirmaciones son falsas. La primera porque estuve esperando en el punto de entrega (que es mi domicilo) todo el día, y en ningún momento estuve ausente lo que quiere decir que el mensajero no vino a entregar el paquete aunque en la página web escribiera que fue imposible esta entrega. Y lo segundo es que mi móvil (como todos los móviles de hoy en día) recoge y almacena todas las llamadas efectuadas tanto entrantes y salientes como perdidas, y no tengo en absoluto ningún registro de llamada entrante o perdida de ese día. Esto quiere decir de forma inequívoca que ni estuvieron en mi domicilio para entregar el paquete, ni trataron de contactar conmigo. Osea mienten de forma descarada. No está bien mentir y aborrezco a la gente que lo hace. ## Frequently Bought Together - Casio FX 991 MS Calculator - Amazon Basics Stapler with 1000 Staples Black - BIC Cristal Original Smudge Free Ballpoint Pens, Ideal for School, Black, Medium Point (1.0mm), Pack of 50 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fi/products/258273829-casio-scientific-calculator-fx-991ms](https://www.desertcart.fi/products/258273829-casio-scientific-calculator-fx-991ms) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-06-19*