E-Calc is a calculator and unit conversion program designed to be used by scientists and engineers. It allows evaluation of complex expressions and can handle most any function contained on a scientific calculator. An expression is entered in a form similar to a formula in a spreadsheet. A log of previously entered expressions can be recalled. User defined variables can be used to store and reuse previous results. E- Calc has an excellent Units Conversion tool. A wide range of conversion factors are available. It also has a Hex/Octal/Binary Converter. Does clock arithmetic and also supports complex math (imaginary numbers) calculations. Help files include handy formulas such as integration tables, trigonometric formulas, geometric formulas (area, moment of inertia, etc.), and physical constants. Performs numerical integration, differentiation, root finding, etc. Has a small screen footprint. A great value.

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