Numbat

Numbat is a calculator and programming language for scientific
computations. It knows physical units, converts between them and checks
that dimensions match. Run it without arguments for an interactive session.

Examples

numbat -e "8 km / (1 h + 25 min) -> mph"

numbat -e "100 EUR -> USD"

numbat ./my-script.nbt

File access

Numbat can run scripts in your home directory. To also use USB drives and
other removable media (/media, /mnt), run:

sudo snap connect numbat:removable-media