DonateQalculate!
- the ultimate desktop calculator
Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation). Features include a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface (GTK, Qt, and CLI).
Qalculate! is free software, licensed under the GNU Public License v2 (or later).
Latest News
2024-07-01
Qalculate! version 5.2 released
Changes:
- Physical constants updated with CODATA 2022 values
- New function: allroots()
- New units: therm, thermie, IUNS calorie, rpm
- Additional names/symbols for turn unit
- Use symbol "cal" for thermochemical (instead of international table) calorie
- Change title and names/symbols of weak mixing angle (prepend "sin2" to theta variants)
- Return exact negative integers in log10()
- More conservative handling of infinity in equations
- Remove n from equation solution if possible using assumptions of x
- Fix input of scientific E-notation using lowercase e in numbers using concise interval notation, in expressions
- Fix "bit width" and "signed integer" arguments in setbits()
- Fix a^(f(x))=a^(b*g(x)) where b=2 or b=3
- Fix auto/dual approximation with "where" expression
- Fix "where" expressions with multiple inequality statements for a single variable, e.g. "where x>0 and x<10"
- Fix crash when a variable name/symbol with more than 20 characters is used in "where" expression
- Fix qalc not exiting after factorization in non-interactive mode (CLI)
- Option to change the max number of history lines saved (GTK, Qt)
- Fix subsequent tab completions after completion of unit with prefix (GTK, Qt)
- Save date and time for history items, add search by date, and show date of selected history item in search by date context menu item (GTK)
- Option to save history to separate file (GTK)
- Improved sorting of text strings with Unicode characters (GTK)
- Reverse order of row and column for element index in matrix dialogs (GTK)
- Fix extremely small superscript and subscript with some fonts and on Windows with scaling ≥200% (GTK)
- Fix empty windows when opened a second time (GTK)
- Option (enabled by default) to show expression status (parsed expression and calculated value) as you type in history list, instead of in tooltip (Qt)
- Option to hide toolbar (Qt)
- Option to preserve height of history list when keypad or number bases are shown/hidden (Qt)
- Headers for keyboard shortcuts and actions lists to allow custom sorting (Qt)
- Option to show/hide hidden units (hidden by default) in units window (Qt)
- Reduced minimum height (one line) of expression field (Qt)
- Fix unnecessary parenthesis, with wrong color for closing bracket, around unit with exponent (Qt)
- Fix convert button text, when toolbar style is not icon only (Qt)
- Fix history list not cleared before reload if there are exactly one item (Qt)
- Minor bug fixes and feature enhancements