This can be found in the Arch Linux AUR:
https://aur.archlinux.org/packages/perl-math-calc-units/
The Math::Calc::Units module is Human-readable unit-aware calculator. It can be found on CPAN:
https://metacpan.org/release/Math-Calc-Units
mvgrimes/aur-perl-math-calc-units
An Arch Linux package for the Perl Math::Calc::Units module a Human-readable unit-aware calculator
Shell