fend

fend is an arbitrary-precision unit-aware calculator.

Unique features:

Arbitrary-precision arithmetic using rational numbers
Full support for complex numbers
D&D-style dice rolls
Variables
Binary, octal, hexadecimal and all other bases between 2 and 36
Keep track of units, with support for SI, US and UK customary and many historical units
Emacs-style CLI shortcuts
Trigonometric functions
Lambda calculus

See the manual for more information.

Web Interface

fend is available on the web at printfn.github.io/fend.

Installation

The easiest way to install fend locally is via your package manager:

| Package Manager | Command | | ----------------------- | -------------------------- | | Homebrew | brew install fend | | MacPorts | sudo port install fend | | AUR (Arch Linux) | yay -S aur/fend-bin | | AOSC OS | oma install fend | | Xbps (Void Linux) | xbps-install fend | | Nix | Add nixpkgs.fend to your config, or install ephemerally using nix-shell -p fend. | | Cargo | cargo install fend | | Windows Package Manager | winget install fend | | Chocolatey | choco install fend | | Scoop | scoop install fend | | Pkgx | pkgx fend |

Alternatively, you can manually download the latest stable binaries here.

Once fend is installed, run fend to start a REPL session:

$ fend
> 1 ft to cm
30.48 cm
>

Packages

Manual

You can find the fend manual here.

Examples

> 5'10" to cm
177.8 cm

> cos (pi/4) + i * (sin (pi/4))
approx. 0.7071067811 + 0.7071067811i

> 0b1001 + 3
0b1100

> 0xffff to decimal
65535

> 100 C to F
210 °F

> temperature = 30 °C
30 °C
> temperature to °F
86 °F

> roll d20
8
> roll 4d6
17

Projects using fend

These are some projects making use of fend:

Feel free to make a pull request to add your own!

License

fend is available under the MIT license. See LICENSE.md for more information.

Fend

Install / Use

README