ExpressionsCalculator is a multifunction scientific calculator designed to cater to users ranging from basic to advanced calculations. Ideal for high-school and STEM university students, chemists, engineers, mathematicians, and physicists, this calculator offers a rich set of features. In addition to standard calculator functions, it provides a vast array of natural constants and a comprehensive database of formulas in mathematics, physics, and chemistry. The calculator operates within SI (MKSA), imperial, and astronomical units contexts, ensuring accurate and simplified results.

Armed with capabilities for arithmetics on integers, rational and floating numbers, ExpressionsCalculator handles large and small numbers with ease. It offers extended floating-point range, vector algebra operations, and automatic unit conversions, making it a versatile tool for various scientific disciplines.