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Arbitrary-precision unit-aware calculator, mirror of https://github.com/printfn/fend
README.md

fend

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fend is an arbitrary-precision unit-aware calculator.

Unique features:

  • Arbitrary-precision arithmetic using rational numbers
  • Full support for complex numbers
  • 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 now available on the web at https://fend.printfn.nz.

Installation

Packaging status

Install fend by running cargo install fend in your terminal. Alternatively you can download the latest stable binaries here.

You can then run fend to start a REPL session:

$ cargo install fend
...
$ 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

> 1 1/2' to cm
45.72 cm

> 1 lightyear to parsecs
approx. 0.3066013937 parsecs

> (x: 2x) pi
approx. 6.2831853071

License

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

fend optionally includes the GPLv3-licenced definitions.units and currency.units data files from GNU Units. This can be changed via the gpl feature defined in core/Cargo.toml.