This is a list of notable software calculators.

Immediate execution calculators (button-oriented)

NameSoftware licenseOS SupportPrecisionScientific
mode		RPN
mode		Hex/oct/bin
mode
DeskCalcHaikuArbitrary decimal
DesmosWeb browser, iOS, AndroidFloating point
Mac OS calculatormacOSDouble (64 bit)
Calculator (Nintendo Switch)Nintendo SwitchFixed decimal (up to 16 digits)
GraphermacOSDouble (64 bit)
GeoGebraWeb browser, Windows, macOS, Linux, iOS, AndroidArbitrary decimal
GNOME CalculatorLinux, BSDs, macOSArbitrary decimal
GraphCalcWindows, LinuxDouble (64 bit)
KCalcLinux, BSDs, macOSArbitrary decimal
Qalculate!Linux, Windows, macOSArbitrary decimal
Windows CalculatorWindows≥32 decimal
WRPN CalculatorWindows, Linux, macOS, AndroidFloat
xcalcLinuxArbitrary decimal

Expression or formula calculators (command-line oriented)

See also: List of computer algebra systems
NameSoftware licenseOS SupportPrecisionHex/oct/bin
mode		RPN
mode		Defining
variables		Defining
functions		Syntax
highlighting		Unit conversionMultiple Steps
Atari CalculatorAtari 800Float
bc programming languageUnixVariable
CalcpadWindows, Linuxdouble
MathcadWindowsFloating point (typically double)
MathematicaWindows, macOS, LinuxArbitrary precision
MaximaWindows, macOS, Linux, BSDArbitrary precision
SymbolabWeb browser, iOS, AndroidSymbolic and numeric
WolframAlphaWeb browser, iOS, AndroidArbitrary precision

See also