There are a lot of different types of calculators on the market. Some are designed for specific purposes while others are more versatile. Here are 7 of the best calculators that you can buy, based on your needs.

1. Casio fx-991ES Plus: This is a great all-purpose calculator that is perfect for school or work. It has many features that make it versatile, such as a built-in dictionary, a currency converter, and a fraction converter. It is also very affordable, making it a great option for those on a budget.

2. Texas Instruments TI-84 Plus: This calculator is perfect for students who need a powerful calculator for math and science classes. It has features that make it easy to graph equations and perform statistical calculations. It is also very user-friendly, which makes it a great option for those who are new to using calculators.

3. Hewlett Packard HP-12C: This calculator is designed for financial professionals. It has features that make it easy to calculate interest, loans, and investments. It is also very durable, making it a great option for those who need a calculator that will last.

4. Casio fx-115ES Plus: This calculator is perfect for students who need a powerful calculator for math and science classes. It has features that make it easy to graph equations and perform statistical calculations. It is also very user-friendly, which makes it a great option for those who are new to using calculators.

5. Texas Instruments TI-30XIIS: This calculator is perfect for students who need a basic calculator for math and science classes. It is very user-friendly and has a large display that makes it easy to see the results of your calculations. It is also very affordable, making it a great option for those on a budget.

6. Sharp EL-W516XBSL: This calculator is perfect for students who need a powerful calculator for math and science classes. It has features that make it easy to graph equations and perform statistical calculations. It is also very user-friendly, which makes it a great option for those who are new to using calculators.

7. TI-36X Pro: This calculator is designed for engineers and other professionals who need to perform complex calculations. It has features that make it easy to perform trigonometric, logarithmic, and exponential calculations. It is also very durable, making it a great option for those who need a calculator that will last.