winget install --id=from104.QCalc -e QCalc packs five specialized calculators (Standard, Unit, Currency, Radix, Formula) and 10 languages into one keyboard-friendly, screen-reader-accessible app.
A multi-purpose calculator for productivity and accessibility — standard · unit · currency · radix · formula Keyboard first, screen-reader friendly, 10 languages. Desktop (Linux · Windows) and Android.
QCalc packs 5 specialized calculators (Standard, Unit, Currency, Radix, Formula) and 10 languages (한국어, English, 日本語, 中文, हिन्दी, Deutsch, Español, Français, Português, Русский) into one clean, keyboard-friendly app. Whether you're crunching everyday numbers, converting units, checking exchange rates, working with hex/binary, or evaluating math formulas — it's all one tab away.
| Mode | What it does | Access |
|---|---|---|
| Standard | Arithmetic, percentages, trig, powers, roots, factorial | Ctrl+1 |
| Unit Converter | 15+ categories — length, weight, area, volume, angle, and more | Ctrl+2 |
| Currency Converter | 340 currencies (fiat, crypto, metals) — no API key needed | Ctrl+3 |
| Radix Converter | Binary / Octal / Decimal / Hex with AND, OR, XOR, NOT, shifts | Ctrl+4 |
| Formula | Type math expressions directly using mathjs syntax | Ctrl+5 |
sqrt(2) * pi, sin(45 deg), log(1000)@ to reference the current value, $ to reference memoryQCALC_FORCE_XWAYLAND=1)> All translations except Korean were generated by AI. If you notice any errors or have suggestions for improvements, please let us know through Issues.
> Legend: C = Ctrl, S = Shift, A = Alt
| Key | Action |
|---|---|
0-9 . | Number input |
+ - * / | Arithmetic |
Enter = | Calculate |
Backspace | Delete last |
Delete | Clear all |
u i | x² / √x |
j | Toggle sign ± |
k % | Percentage |
l | Reciprocal 1/x |
' | Shift mode |
| Key | Action |
|---|---|
r t | xⁿ / ⁿ√x |
f | 10ⁿ |
g | Modulo |
h | Factorial x! |
q w e | sin / cos / tan |
z x c | π / φ / e |
a s d | π/2 / ln10 / ln2 |
v b | Integer / fractional part |
| Key | Action |
|---|---|
C-Enter | Store (MS) |
C-Backspace | Recall (MR) |
C-Delete | Clear (MC) |
C-+ C-- | M+ / M− |
C-* C-/ | M× / M÷ |
| Key | Action |
|---|---|
a s d | ×10 / ×100 / ×1000 |
z x c | ÷10 / ÷100 / ÷1000 |
f g h | ×2/×3/×5 or +5/+10/+100 |
q w e | ÷2/÷3/÷5 or −5/−10/−100 |
\ | Swap source ↔ target |
A-\ | Toggle symbol display |
| Key | Action |
|---|---|
z x c a s d | Hex A–F |
j k l | AND / OR / XOR |
h | NOT |
r t | Shift ±1 bit |
f g | Shift ±4 bits |
u i | Shift ±N bits |
q w e | NAND / NOR / XNOR |
\ | Swap source ↔ target |
A-\ | Toggle radix display |
A-C-\ | Toggle prefix/suffix |
| Key | Action |
|---|---|
Space | Enter edit mode |
Enter | Evaluate (or enter edit if empty) |
Escape | Clear expression and exit edit |
↑ ↓ | Browse expression history |
= | Evaluate expression |
| Key | Action |
|---|---|
F1–F5 | Help / About / Settings / History / Tips |
C-Tab → | Next tab |
C-S-Tab ← | Previous tab |
C-1–C-5 | Jump to tab |
Escape | Close panel |
A-t | Always on top |
A-d | Dark mode |
A-n | Per-calculator number format |
A-p | Haptic feedback |
, | Toggle grouping |
A-, | Grouping unit (3/4) |
[ ] | Decimal places (∞–16) |
; | Toggle extra functions |
| Key | Action |
|---|---|
C-c | Copy main panel |
S-C-c | Copy sub panel |
C-v | Paste to main |
S-C-v | Paste to sub |
| Key | Action |
|---|---|
↑ ↓ | Scroll |
PgUp PgDn | Fast scroll |
Home End | Top / bottom |
C-f | Search |
C-[ C-] | Font size −/+ |
| Platform | Method |
|---|---|
| Windows | Download NSIS installer from Releases (auto-update supported) |
| Linux | .deb / .rpm / AppImage from Releases (AppImage auto-updates), Snap (snap install qcalc), or Flatpak from our own repository: flatpak install --user https://from104.github.io/qcalc/flatpak/qcalc.flatpakref (auto-updates) |
| Android | APK from Releases |
> Linux package compatibility: the .deb supports Ubuntu 22.04+ / Debian 12+ (and derivatives such as Mint 21+, Pop!_OS 22.04+); the .rpm supports Fedora 37+ and openSUSE Leap 15.6+/Tumbleweed. RHEL/Alma/Rocky 9 and older Debian/Ubuntu are not supported by these packages (glibc/WebKitGTK too old) — use the AppImage (any distro with glibc 2.35+), Flatpak, or Snap instead; those bundle their own runtime.
> Screen reader users on Linux: use the .deb, .rpm or AppImage. Inside the Flatpak sandbox the WebKit UI is currently not exposed to assistive technologies (upstream limitation, #113).
> macOS / iOS builds are not available at this time.
> Upgrading from 0.12.x or older (Electron)? On Windows and the AppImage the old app's update check reaches 0.13.1 and installs it for you; on Windows the old installation is removed in the process. Every other package (.deb, .rpm, Snap, Flatpak) has to be installed by hand. Either way, bring your data over: in the old app export your history (CSV) and settings (JSON), and import them from the new app's first-run screen (or Settings).
>
> 0.13.0 itself was published without the file the old app's updater reads, so an install still on 0.12.x will only be offered 0.13.1 or later.
See CONTRIBUTING.md for translation and contribution guidelines.
See DEVELOP.md for build instructions and development setup.