10 Best Calculators 2026 in the United States

The HP Prime Graphing Calculator II is a high-performing and sleek device suitable for advanced mathematics and scientific computations. It is IB Diploma Programme exam approved, making it a reliable choice for students. The brushed metal design not only looks stylish but also comes with a slide-on cover for protection when not in use. The calculator features a large 3.5-inch multi-touch display, providing a user-friendly interface that's easy to navigate with its familiar HP alphanumeric keypad, which can be especially beneficial during complex calculations or exam settings. Additionally, the lithium-ion rechargeable battery ensures long-lasting use and is convenient as it eliminates the need for frequent battery replacements.

The calculator also boasts 256 MB of flash memory, which is ample for storing various functions and data. Another notable feature is its inclusion in the unique STEM ecosystem, compatible with the HP Prime Wireless Kit and HP Connectivity Kit, enhancing its versatility and connectivity options. On the downside, the product might be on the heavier side at 8 ounces and could feel bulky to some users. Given its range of advanced features, it may also come with a steeper learning curve for those not familiar with graphing calculators.

It’s a great tool for students and professionals who require extensive mathematical functionality and appreciate modern design, though it might be a bit overpowered for basic office use or casual needs.

The Sharp EL-1801V Ink Printing Calculator offers impressive features that cater well to anyone needing a reliable tool for accounting and financial calculations. One of its standout aspects is the large 12-digit blue fluorescent display, which makes reading figures easy, even in less-than-ideal lighting. The two-color ink printer, with a speed of 2.5 lines per second, allows for clear and accurate record-keeping. Its one-touch change calculation function is a great time-saver, particularly useful for quick adjustments or corrections during calculations.

For professionals in finance, retail, or anyone who needs to calculate costs, sell prices, and margins efficiently, the dedicated keys for these functions, along with the grand total and average calculations, enhance productivity. The calculator's durability is commendable, designed to withstand daily use, making it a solid option for office environments.

There are a few points to consider. Since it operates on AC power, it may not be ideal for mobile use or places without a power outlet. Additionally, while the ink roller can be replaced, users need to factor in the cost of replacements over time, which might affect long-term usability. The design, being somewhat bulky compared to handheld models, could also be a consideration if space is limited.

The HP 12CP Financial Calculator is designed specifically for financial and business professionals. It is equipped with over 120 built-in functions covering business, finance, mathematics, and statistics, making it a robust tool for complex calculations. The calculator uses Reverse Polish Notation (RPN) for efficient data entry, which might require a learning curve for some users but can speed up calculations once mastered.

Its small size and lightweight design make it highly portable, fitting easily into a bag or briefcase, while the long battery life ensures reliable performance over time. The 2-inch screen is sufficient for displaying calculations clearly, though it may be small for those used to larger displays. Powered by a CR123A battery (included), the device ensures you won't need frequent battery replacements.

The calculator's durability is also notable, with a solid build that can withstand regular use. However, the reliance on RPN and the relatively small screen size may be drawbacks for some users who prefer standard entry systems or larger displays. Despite these minor issues, the HP 12CP excels in providing a comprehensive tool for financial calculations, making it an excellent choice for professionals in finance and business.