Comparison of software calculators

This is a list of notable software calculators.

Immediate execution calculators (button-oriented)

Name	Software license	OS Support	Precision	Scientific mode	RPN mode	Hex/oct/bin mode
DeskCalc	MIT	Haiku	Arbitrary decimal	Yes	No	No
Mac OS calculator	Proprietary	macOS	Double (64 bit)	Yes	Yes	Yes
GNOME Calculator	GPL-3.0-or-later	Linux, BSDs, macOS	Arbitrary decimal	Yes	Yes	Yes
KCalc	GPL-2.0-or-later	Linux, BSDs, macOS	Arbitrary decimal	Yes	Yes	Yes
Windows Calculator	MIT	Windows	≥32 decimal	Yes	Yes	Yes
WRPN Calculator	Public domain	Windows, Linux, macOS, Android	Float	Yes	Yes	Yes
xcalc	X11	Linux	Arbitrary decimal	Yes	Yes	Yes

|- | Age Calculator (Gregorian & Hijri)^[1] | Public domain | Web | Date-level (Gregorian & Hijri) | No | No | No

Expression or formula calculators (command-line oriented)

Name	Software license	OS Support	Precision	Hex/oct/bin mode	RPN mode	Defining variables	Defining functions	Syntax highlighting	Unit conversion	Multiple Steps
Atari Calculator	Proprietary	Atari 800	Float	Yes	Yes	Yes	Yes	No	Yes	Yes
bc programming language	GNU General Public License	Unix	Variable	Yes	Un­known	Yes	Yes	No	No	Un­known
kalker	MIT	Linux, BSDs, macOS, Windows	Variable	Yes	Un­known	Yes	Yes	Yes	Partial	Un­known