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-website.

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

On macOS (using Homebrew):

bash brew install printfn/fend/fend

On Arch Linux (using yay):

bash yay -Syu aur/fend

Using the nix package manager:

bash nix-env -iA nixpkgs.fend

On systems with Rust:

bash rustup update cargo install fend

You can also 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

```

You can find the fend manual here.

```

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 ```

```

1 lightyear to parsecs approx. 0.3066013937 parsecs ```

```

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

```

roll d20 8 roll 4d6 17 ```

fend is MIT-licensed. See LICENSE.md for more information.