NUMFMT(1)                   General Commands Manual                  NUMFMT(1)

NAME
       numfmt - Convert numbers from/to human-readable strings

SYNOPSIS
       numfmt [OPTION]... [NUMBER]...

DESCRIPTION
       Convert numbers from/to human-readable strings

OPTIONS
       --debug
              print warnings about invalid input

       --grouping
              use locale-defined grouping of digits, for example 1,000,000
              (which means it has no effect in the C/POSIX locale)

       -d, --delimiter <X>
              use X instead of whitespace for field delimiter

       --field <FIELDS> [default: 1]
              replace the numbers in these input fields; see FIELDS below

       --format <FORMAT>
              use printf style floating-point FORMAT; see FORMAT below for
              details

       --from <UNIT> [default: none]
              auto-scale input numbers to UNITs; see UNIT below

       --from-unit <N> [default: 1]
              specify the input unit size

       --to <UNIT> [default: none]
              auto-scale output numbers to UNITs; see UNIT below

       --to-unit <N> [default: 1]
              the output unit size

       --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

       --header[=<N>]
              print (without converting) the first N header lines; N defaults
              to 1 if not specified

       --round <METHOD> [default: from-zero]
              use METHOD for rounding when scaling

              Possible values:

                     o up

                     o down

                     o from-zero

                     o towards-zero

                     o nearest

       --suffix <SUFFIX>
              print SUFFIX after each formatted number, and accept inputs
              optionally ending with SUFFIX

       --unit-separator <STRING>
              use STRING to separate the number from any unit when printing;
              by default, no separator is used

       --invalid <INVALID> [default: abort]
              set the failure mode for invalid input

              Possible values:

                     o abort

                     o fail

                     o warn

                     o ignore

       -z, --zero-terminated
              line delimiter is NUL, not newline

       -h, --help
              Print help

       -V, --version
              Print version

EXTRA
       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.

VERSION
       v(uutils coreutils) 0.11.0

                                  2026-09-01                         NUMFMT(1)