--- product_id: 664850619 title: "Scientific Calculators, IPEROT Black Math Calculator with 417 Function, Solar Battery Power and 4-Line Display, School Supplies for Middle High College Students Teachers (Black 991ES)" brand: "iperot" price: "€ 30.27" currency: EUR in_stock: true reviews_count: 13 category: "Iperot" url: https://www.desertcart.pt/products/664850619-scientific-calculators-iperot-black-math-calculator-with-417-function-solar store_origin: PT region: Portugal --- # 4-line multi-expression display Dual solar & battery power 417 advanced functions Scientific Calculators, IPEROT Black Math Calculator with 417 Function, Solar Battery Power and 4-Line Display, School Supplies for Middle High College Students Teachers (Black 991ES) **Brand:** iperot **Price:** € 30.27 **Availability:** ✅ In Stock ## Summary > 🔢 Power your math mastery with IPEROT’s 417-function calculator—because every equation deserves the best. ## Quick Answers - **What is this?** Scientific Calculators, IPEROT Black Math Calculator with 417 Function, Solar Battery Power and 4-Line Display, School Supplies for Middle High College Students Teachers (Black 991ES) by iperot - **How much does it cost?** € 30.27 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/664850619-scientific-calculators-iperot-black-math-calculator-with-417-function-solar) ## Best For - iperot enthusiasts ## Why This Product - Trusted iperot brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Read with Ease:** Large 4-line display shows expressions and results simultaneously for error-free calculations. - • **Power Without Limits:** Solar + battery dual power ensures uninterrupted use anytime, anywhere—no dead batteries, no stress. - • **Built to Last & Perform:** Durable, lightweight design crafted for daily use by students and professionals alike. - • **Master Complex Calculations:** 417 functions covering algebra, calculus, stats & more—your all-in-one math powerhouse. - • **Versatile for Every Learner:** Perfect for middle school to college students, teachers, engineers, and anyone who demands precision. ## Overview The IPEROT 991ES scientific calculator features 417 advanced functions including algebra, calculus, and statistics, displayed on a large 4-line LCD screen. Powered by a reliable dual solar and battery system, it ensures continuous use without battery anxiety. Designed for durability and ease of use, it’s ideal for students, educators, and professionals needing precise, multi-step calculations. ## Description desertcart.com : Scientific Calculators, IPEROT Black Math Calculator with 417 Function, Solar Battery Power and 4-Line Display, School Supplies for Middle High College Students Teachers (Black 991ES) : Office Products Review: Great calculator - Great light weight calculator. Easy to use. Great for my middle schooler in helping with fractions. Comes with a pamphlet on how to get the calculator to do certain functions. I really like the sliding cover as well. Review: Good Calculator - Good cheap calculator! You cant graph but everything works as it should, and it does its job so no complaints also the best part is you don't have to replace batteries! ## Features - 417 FUNCTIONS : This scientific calculator boasts 417 function, including algebraic, fraction, derivative, integral, statistical, complex number calculation, linear regression, standard deviation, permutation and combination, and variable solving, similar to operations found in math textbooks. It is well-suited for advanced and basic courses, high school and college students financial calculator calculadora cientifica construction calculator - LARGE DISPLAY SCREEN : lts screen is large enough to display four lines of numbers,.making it easier to read than traditional calculators. The written display of expressions allows you tosee the calculation process and results, making it a non-programmable calculator - SOLAR AND BATTERY DUAL POWER SYSTEM : The calculator features a dual power systemthat uses both solar and battery power, allowing users to use it anytime, anywhere, without worryingabout battery issues - STABLE AND RELlABLE : The scientific calculator is made with high-quality materials, has asturdy and durable exterior, and is easy to operate, with stable and reliable performance - WIDE RANGE OF USERS : As an essential school supply, middle school supplies, it is ideal for elementary, middle,and high school students, college students, engineers, nurses, and teachers, among others. lt can meettheir calculation needs in math, science, and engineering felds and help them better understand andapply knowledge. It can also be given to those who need to do scientifc calculations, makingit a practical and meaningful school supplies ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DG29TXGS | | Best Sellers Rank | #24,985 in Office Products ( See Top 100 in Office Products ) #28 in Scientific Calculators | | Brand | IPEROT | | Calculator Type | Engineering/Scientific | | Color | BLACK | | Customer Reviews | 4.4 4.4 out of 5 stars (446) | | Display Type | LCD | | Enclosure Material | Plastic | | Item Dimensions L x W | 6"L x 2"W | | Manufacturer | IPEROT | | Mfr Part Number | 01 | | Model Name | 991ES | | Model Number | calculator-AB | | Number of Batteries | 1 LR44 batteries required. (included) | | Power Source | Solar Powered | | Screen Size | 6.5 Inches | | Warranty Description | 1 | ## Product Details - **Brand:** IPEROT - **Calculator Type:** Engineering/Scientific - **Color:** BLACK - **Power Source:** Solar Powered - **Screen Size:** 6.5 Inches ## Images ![Scientific Calculators, IPEROT Black Math Calculator with 417 Function, Solar Battery Power and 4-Line Display, School Supplies for Middle High College Students Teachers (Black 991ES) - Image 1](https://m.media-amazon.com/images/I/511uDMn2APL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great calculator *by C***A on February 23, 2026* Great light weight calculator. Easy to use. Great for my middle schooler in helping with fractions. Comes with a pamphlet on how to get the calculator to do certain functions. I really like the sliding cover as well. ### ⭐⭐⭐⭐⭐ Good Calculator *by L***A on February 2, 2026* Good cheap calculator! You cant graph but everything works as it should, and it does its job so no complaints also the best part is you don't have to replace batteries! ### ⭐⭐⭐⭐⭐ For the pink lovers *by M***Y on December 30, 2025* Super cute and works well(it’s a calculator) I used it for my college algebra class ## Frequently Bought Together - Scientific Calculators, IPEROT Black Math Calculator with 417 Function, Solar Battery Power and 4-Line Display, School Supplies for Middle High College Students Teachers (Black 991ES) - Texas Instruments TI-30XIIS Scientific Calculator, Black with Blue Accents - Casio fx-115ES Plus 2nd Edition – Advanced Scientific Calculator | 280+ Functions, Natural Textbook Display℠ | Ideal for Math, Science, Engineering & Statistics --- ## 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.pt/products/664850619-scientific-calculators-iperot-black-math-calculator-with-417-function-solar](https://www.desertcart.pt/products/664850619-scientific-calculators-iperot-black-math-calculator-with-417-function-solar) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-17*