The Math::Units module converts a numeric value in one unit of measurement
to some other unit. The units must be compatible, i.e. length cannot be
converted to volume. If a conversion cannot be made an exception is
thrown.

A combination chaining and reduction algorithm is used to perform the most
direct unit conversion possible. Units may be written in several different
styles. An abbreviation table is used to convert from common long-form
unit names to the (more or less) standard abbreviations that the units
module uses internally. All multiplicative unit conversions are cached so
that future conversions can be performed very quickly.

Too many units, prefixes and abbreviations are supported to list here. See
the source code for a complete listing.

WWW: https://metacpan.org/release/Math-Units