The Units program converts quantities expressed in various scales
to their equivalents in other scales. The units program can handle
multiplicative scale changes as well as nonlinear conversions such as
Fahrenheit to Celsius or wire gauge. Units comes with an annotated,
extendable database defining over seven thousand units, including 134
nonlinear units, and 125 prefixes, using ten systems of units including
SI, 189 currencies, bitcoin and precious metals prices, plus US CPI
Consumer Price Index, all of which may be updated using units_cur.
For more information see the project home pages:
https://gnu.org/s/units/
https://sv.gnu.org/p/units/
The following package has been upgraded in the Cygwin distribution:
- units 2.25
A native Windows binary distribution should also soon be available:
https://ftpmirror.gnu.org/units/windows/units-2.25-setup.exe{,.sig}
If you would like to update currency exchange rates and commodity
prices, just run units_cur at the command line, in a profile or rc
startup script, or in a *daily* cron job.
Do *NOT* run units_cur more frequently than daily, as currency exchange
rates and commodity prices are updated only at most weekdays, and
excessive requests from units users could cause free access to accurate
online sources be stopped.
For changes since the previous Cygwin release see below or read
/usr/share/doc/units/NEWS after installation.
2025-01-18 2.25
- Changed units_cur to ignore invalid CPI data
- Add support for multivariate functions
- Because comma is used for multivariate functions, the comma is no
longer allowed in unit names.
Four units whose names contained the comma were renamed with an
underscore replacing the comma.
Affected units: lambda_C,p; lambda_C,n; lambda_C,mu; and lambda_C,tau.
- Extended (hyperbolic) trigonometric functions to include secant, csc
cot, sech, coth, csch and their inverses.
- Added some multvariate units like windchill, heatindex, bmi, hypot
- Added "search _" to list the run-time variables (which start with _)
- Added --list-units (noniteractive) and "search ." (interactive) to
list all unit definitions.
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