gdcalc – financial, scientific and programmer calculator

gdcalc is a graphical calculator that combines financial, scientific, statistical and programmer functions. It supports both conventional algebraic notation and Reverse Polish Notation (RPN), giving users a choice between two different methods of entering calculations.

Its financial functions are particularly useful for calculations involving interest, payments and the time value of money. Users can calculate present and future values, determine payment amounts and work with annuities where payments occur at the beginning or end of a compounding period.

Scientific mode provides trigonometric, hyperbolic and logarithmic functions, while statistics mode includes descriptive statistics and numerical analysis. These capabilities make gdcalc suitable for work extending beyond ordinary arithmetic.

Programmer mode provides several number representations and logical operations, including binary, octal, decimal and hexadecimal displays. Additional tools can display ASCII values and Internet addresses.

gdcalc also incorporates unit conversions covering measurements commonly encountered in scientific, engineering and everyday calculations.

This is free and open source software.

Key Features

• Supports algebraic and Reverse Polish Notation calculation modes.
• Financial calculations include compound interest, present value and future value.
• Calculate payment amounts, interest rates and numbers of payments.
• Supports annuities with payments at the beginning or end of a period.
• Date difference calculations.
• Scientific functions include trigonometric and hyperbolic operations.
• Logarithmic functions and their inverses.
• Statistical functions include means and standard deviations.
• Permutations, combinations and factorial calculations.
• Linear regression functionality.
• Binary, octal, decimal and hexadecimal number displays.
• ASCII and Internet address representations.
• Logical operations include AND, OR, NOT, MOD and bit shifts.
• Prime factor calculations.
• Unit conversion for length, area, volume and mass.
• Additional conversions include speed, fuel consumption and pressure.
• Temperature conversion between Celsius, Fahrenheit and Kelvin.

Website: gitlab.com/wef/gdcalc
Support:
Developer: Robert Hepple
License: GNU General Public License v2.0

gdcalc is written in C. Learn C with our recommended free books and free tutorials.

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