Top 10 Best Calculators in India 2021 (Casio, Texas Instruments, and more)

Saksham is an electronics and communication engineering graduate with a keen interest in dissecting electronic items and figuring out their workings. In his college life, he was a part of some interesting projects, be it working on microcontrollers or electrical wirings of a prototype car.

There are different calculators available, varying from a standard calculator to a financial calculator with complex operations. If you're looking for a calculator for basic arithmetic operations like addition, subtraction, a standard calculator shall be optimal.

A scientific calculator is much more suitable if you're looking for advanced calculations like trigonometric, logarithmic, or exponential operations. It is an apt choice for students in mathematics and scientific fields.

Then there are financial and graphing calculators - made for users looking to solve equations and plotting graphs; Functions like differential equations and histogram plots are doable. These calculators are programmable and come equipped with WiFi, so you can directly solve a math equation via the internet or download programs or apps. 

One of the essential aspects is selecting the apt size for usage. There are pocket-size calculators that you can fit in your palm and store easily in your pocket. Then some desk-sized calculators provide a big numeric pad to handle and work on. There are the standard desktop size calculators, and there are extra-large.

If you're criteria of selection hinges on portability, look for a pocket-size calculator. They are easy to carry, but they are not suitable for speedy calculation because of the small keys. If you're looking for a calculator for fast calculation and portability is not a big criterion, desktop size calculators are much more preferable. The keys are more snappy, and the bigger display helps in working fast and efficiently.

For students and accountants, a display with at least ten digits visible on the calculator is suitable. It would not only enable them to work with large numbers but also give more accurate decimal values. The ideal recommendation is a 12-digit calculator for students and accountants.

There are custom made 14 digit calculators for big calculations available as well. Such calculators are desk oriented and huge in size. They are apt for fast calculations with big numbers.

During an exam or when tallying a cost sheet or some important calculation, you don't want your calculator slipping and shifting while pressing the keys to check whether the numbers match or your calculation is correct.

Your calculator should be able to withstand the force used on keys during fast calculations. Make sure the calculator you select has a sturdy grip when placed on a surface. Many calculators also come with rubber grips at the back to prevent them from slipping or falling. It is a small but overlooked aspect; ensure you get it right.

For example, when you're trying to solve a mathematic equation or tally a balance sheet with multiple additions and subtractions, you press 13+2-4 very fast; almost simultaneously, the calculator will pick it up in an exact way with the key rollover function.

There are multiple functions available in a calculator apart from the essential functions some of which add convenience and enhances accuracy and a better experience.

There are some other useful features which you may want in your calculator too. A GT key, the grand total key, would help calculate the sum of all previous results. It helps you enhance time efficiency, adding all the results at the end with a button press.

For example, you calculated 1500+500=2000 and later another calculation 2560-520=2040. Instead of putting numbers again for addition between 2000 and 2040, you can press the GT key, and the calculator will bring up the number from internal memory and give the total.

Certain calculators are fixed with solar cells for an alternate source of energy apart from the battery power. There are small cells placed near the display of the calculator. 

Since the calculator requires minuscule power to function, these solar cells provide sufficient energy for function. When buying a calculator, you can check under the specifications or the calculator's image on the box, around the display, whether it has solar cells or not.

These days many manufacturers offer a warranty on their products for better support in a product malfunction or manufacturing defect. Some calculators come without any warranty, and similarly, calculators with a warranty of up to 3 years.

We recommend getting one with a warranty and checking thoroughly on the product box or e-commerce website for an available warranty. It helps in availing good value of the money spent on product, in case things go wrong.

1. The most important factor is recognising what you will be using your calculator for. For example, if you want your calculator to help with your business, then a printing calculator seems great, or if you are a science student, then a scientific calculator is the way to go. If you are thinking of buying a graphing calculator, please check with your college/school if those calculators are allowed in examinations.
2. Scientific calculators usually have a couple of functions that can be accessed from the same key. Many of those calculators now have color-coded keypads to differentiate between secondary and tertiary functions. So, for example, you have yellow and red colour coding. Then all you would have to do is press a key to enable yellow functions or press the other key to enable red functions on that key. Also, try to look out for calculators with water-resistant printing on keys.
3. You can test if the solar panels on your calculator are working fine by inserting a drained battery in your calculator and blocking the solar panel. This will result in a faded display and lag between inputting a number and its appearance on the screen. Now expose the solar panel to sunlight for some time and see if the display works well.
4. The scientific calculator returns values in degrees as well as radians in the case of trigonometric equations. Make sure that your calculator isn’t in radian mode if you want your answers in degrees because this can throw off your equation and can give you an entirely different answer than the one you are looking for.

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