Calculator.pro provides a free online basic integer calculator. Sooeet also offers a basic and scientific calculator. Calculator Tab offers a calculator that has a memory function and stores all previous calculations.
There are many website that offer a free online calculator, whether the need is for a basic integer calculator or a more complex scientific calculator. The type of calculator selected depends on the mathematician's need, personal preference of layout, ability to use the keyboard number pad to enter digits, and reliability of the calculator interface. Some online calculators offer a pop-out calculator as well to reduce switching between full-screen active windows.