Numfmt (1) Linux Manual Page

numfmt – Convert numbers from/to human-readable strings

Synopsis

numfmt [,OPTION/]… [,NUMBER/]…

Description

Reformat NUMBER(s), or the numbers from standard input if none are specified.

Mandatory arguments to long options are mandatory for short options too.

–debug: print warnings about invalid input
-d, –delimiter=,X/: use X instead of whitespace for field delimiter
–field=,FIELDS/: replace the numbers in these input fields (default=1) see FIELDS below
–format=,FORMAT/: use printf style floating-point FORMAT; see FORMAT below for details
–from=,UNIT/: auto-scale input numbers to UNITs; default is ‘none’; see UNIT below
–from-unit=,N/: specify the input unit size (instead of the default 1)
–grouping: use locale-defined grouping of digits, e.g. 1,000,000 (which means it has no effect in the C/POSIX locale)
–header[=,N/]: print (without converting) the first N header lines; N defaults to 1 if not specified
–invalid=,MODE/: failure mode for invalid numbers: MODE can be: abort (default), fail, warn, ignore
–padding=,N/: pad the output to N characters; positive N will right-align; negative N will left-align; padding is ignored if the output is wider than N; the default is to automatically pad if a whitespace is found
–round=,METHOD/: use METHOD for rounding when scaling; METHOD can be: up, down, from-zero (default), towards-zero, nearest
–suffix=,SUFFIX/: add SUFFIX to output numbers, and accept optional SUFFIX in input numbers
–to=,UNIT/: auto-scale output numbers to UNITs; see UNIT below
–to-unit=,N/: the output unit size (instead of the default 1)
-z, –zero-terminated: line delimiter is NUL, not newline
–help: display this help and exit
–version: output version information and exit

UNIT options:

none: no auto-scaling is done; suffixes will trigger an error
auto: accept optional single/two letter suffix:; 1K = 1000, 1Ki = 1024, 1M = 1000000, 1Mi = 1048576,
si: accept optional single letter suffix:; 1K = 1000, 1M = 1000000, …
iec: accept optional single letter suffix:; 1K = 1024, 1M = 1048576, …
iec-i: accept optional two-letter suffix:; 1Ki = 1024, 1Mi = 1048576, …

FIELDS supports cut(1) style field ranges:

N: N’th field, counted from 1
N-: from N’th field, to end of line
N-M: from N’th to M’th field (inclusive)
-M: from first to M’th field (inclusive)
–: all fields

Multiple fields/ranges can be separated with commas

FORMAT must be suitable for printing one floating-point argument ‘%f’. Optional quote (%’f) will enable –grouping (if supported by current locale). Optional width value (%10f) will pad output. Optional zero (%010f) width will zero pad the number. Optional negative values (%-10f) will left align. Optional precision (%.1f) will override the input determined precision.

Exit status is 0 if all input numbers were successfully converted. By default, numfmt will stop at the first conversion error with exit status 2. With –invalid=‘fail’ a warning is printed for each conversion error and the exit status is 2. With –invalid=‘warn’ each conversion error is diagnosed, but the exit status is 0. With –invalid=‘ignore’ conversion errors are not diagnosed and the exit status is 0.

Examples

$ numfmt –to=si 1000

-> "1.0K"

$ numfmt –to=iec 2048

-> "2.0K"

$ numfmt –to=iec-i 4096

-> "4.0Ki"

$ echo 1K | numfmt –from=si

-> "1000"

$ echo 1K | numfmt –from=iec

-> "1024"

$ df -B1 | numfmt –header –field 2-4 –to=si
$ ls -l | numfmt –header –field 5 –to=iec
$ ls -lh | numfmt –header –field 5 –from=iec –padding=10
$ ls -lh | numfmt –header –field 5 –from=iec –format %10f

Author

Written by Assaf Gordon.

Reporting Bugs

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>

Copyright

Copyright © 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

numfmt (1) Linux Manual Page