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numbat

High-precision scientific calculator with physical units

TLDR

Start the interactive calculator
$ numbat
Evaluate an expression
$ numbat -e "[expression]"
Convert between units
$ numbat -e "5 km -> miles"
Run a numbat script file
$ numbat [path/to/script.nbt]

SYNOPSIS

numbat [options] [file]

DESCRIPTION

numbat is a statically typed programming language for scientific computations with first-class support for physical dimensions and units. It functions as both a powerful calculator and a scripting language.Units can be entered in various formats (km/h, kilometer/hour, GiB, gibibytes, m²) and converted using the -> operator. The standard library includes SI, US Customary, Imperial, Nautical, Astronomical, and Atomic unit systems. Custom units can be defined (e.g., `unit bathtub = 150 L`).The interactive REPL supports command history, Ctrl-R search, and tab completion.

PARAMETERS

-e EXPRESSION

Evaluate an expression and print the result.
--no-prelude
Do not load the standard prelude (math functions, constants, unit definitions).
--no-pretty
Disable pretty-printing of expressions in output.

INSTALL

sudo apt install numbat
sudo pacman -S numbat
sudo zypper install numbat
brew install numbat
nix profile install nixpkgs#numbat

CAVEATS

Physical dimension checking means expressions with incompatible units produce type errors rather than incorrect results.

HISTORY

numbat was created by sharkdp (David Peter) and is written in Rust.

SEE ALSO

bc(1), kalker(1), qalc(1)