.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.50.1.
.TH NUMFMT "1" "April 2025" "GNU coreutils 9.7" "User Commands"
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.SH NAME
numfmt \- Convert numbers from/to human-readable strings
.SH SYNOPSIS
.B numfmt
[\fI\,OPTION\/\fR]... [\fI\,NUMBER\/\fR]...
.SH DESCRIPTION
.\" Add any additional description here
.PP
Reformat NUMBER(s), or the numbers from standard input if none are specified.
.PP
Mandatory arguments to long options are mandatory for short options too.
.TP
\fB\-\-debug\fR
print warnings about invalid input
.TP
\fB\-d\fR, \fB\-\-delimiter\fR=\fI\,X\/\fR
use X instead of whitespace for field delimiter
.TP
\fB\-\-field\fR=\fI\,FIELDS\/\fR
replace the numbers in these input fields (default=1);
see FIELDS below
.TP
\fB\-\-format\fR=\fI\,FORMAT\/\fR
use printf style floating\-point FORMAT;
see FORMAT below for details
.TP
\fB\-\-from\fR=\fI\,UNIT\/\fR
auto\-scale input numbers to UNITs; default is 'none';
see UNIT below
.TP
\fB\-\-from\-unit\fR=\fI\,N\/\fR
specify the input unit size (instead of the default 1)
.TP
\fB\-\-grouping\fR
use locale\-defined grouping of digits, e.g. 1,000,000
(which means it has no effect in the C/POSIX locale)
.TP
\fB\-\-header\fR[=\fI\,N\/\fR]
print (without converting) the first N header lines;
N defaults to 1 if not specified
.TP
\fB\-\-invalid\fR=\fI\,MODE\/\fR
failure mode for invalid numbers: MODE can be:
abort (default), fail, warn, ignore
.TP
\fB\-\-padding\fR=\fI\,N\/\fR
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
.TP
\fB\-\-round\fR=\fI\,METHOD\/\fR
use METHOD for rounding when scaling; METHOD can be:
up, down, from\-zero (default), towards\-zero, nearest
.TP
\fB\-\-suffix\fR=\fI\,SUFFIX\/\fR
add SUFFIX to output numbers, and accept optional
SUFFIX in input numbers
.TP
\fB\-\-to\fR=\fI\,UNIT\/\fR
auto\-scale output numbers to UNITs; see UNIT below
.TP
\fB\-\-to\-unit\fR=\fI\,N\/\fR
the output unit size (instead of the default 1)
.TP
\fB\-z\fR, \fB\-\-zero\-terminated\fR
line delimiter is NUL, not newline
.TP
\fB\-\-help\fR
display this help and exit
.TP
\fB\-\-version\fR
output version information and exit
.SS "UNIT options:"
.TP
none
no auto\-scaling is done; suffixes will trigger an error
.TP
auto
accept optional single/two letter suffix:
1K = 1000, 1k = 1000,
1Ki = 1024,
1M = 1000000,
1Mi = 1048576,
.TP
si
accept optional single letter suffix:
1k = 1000, 1K = 1000,
1M = 1000000,
\&...
.TP
iec
accept optional single letter suffix:
1K = 1024, 1k = 1024,
1M = 1048576,
\&...
.TP
iec\-i
accept optional two\-letter suffix:
1Ki = 1024, 1ki = 1024,
1Mi = 1048576,
\&...
.SS "FIELDS supports \fBcut\fP(1) style field ranges:"
.TP
N
N'th field, counted from 1
.TP
N\-
from N'th field, to end of line
.TP
N\-M
from N'th to M'th field (inclusive)
.TP
\fB\-M\fR
from first to M'th field (inclusive)
.TP
\-
all fields
.PP
Multiple fields/ranges can be separated with commas
.PP
FORMAT must be suitable for printing one floating\-point argument '%f'.
Optional quote (%'f) will enable \fB\-\-grouping\fR (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.
.PP
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 \fB\-\-invalid=\fR'fail' a warning is printed for each conversion error
and the exit status is 2.  With \fB\-\-invalid=\fR'warn' each conversion error is
diagnosed, but the exit status is 0.  With \fB\-\-invalid=\fR'ignore' conversion
errors are not diagnosed and the exit status is 0.
.SH EXAMPLES
.IP
\*[mono]$ numfmt --to=si 1000\*[/mono]
.IP
\-> "1.0k"
.IP
\*[mono]$ numfmt --to=iec 2048\*[/mono]
.IP
\-> "2.0K"
.IP
\*[mono]$ numfmt --to=iec-i 4096\*[/mono]
.IP
\-> "4.0Ki"
.IP
\*[mono]$ echo 1K | numfmt --from=si\*[/mono]
.IP
\-> "1000"
.IP
\*[mono]$ echo 1K | numfmt --from=iec\*[/mono]
.IP
\-> "1024"
.IP
\*[mono]$ df -B1 | numfmt --header --field 2-4 --to=si\*[/mono]
.br
\*[mono]$ ls -l  | numfmt --header --field 5 --to=iec\*[/mono]
.br
\*[mono]$ ls -lh | numfmt --header --field 5 --from=iec --padding=10\*[/mono]
.br
\*[mono]$ ls -lh | numfmt --header --field 5 --from=iec --format %10f\*[/mono]
.SH AUTHOR
Written by Assaf Gordon.
.SH "REPORTING BUGS"
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
.br
Report any translation bugs to <https://translationproject.org/team/>
.SH "SEE ALSO"
Full documentation <https://www.gnu.org/software/coreutils/numfmt>
.br
or available locally via: info \(aq(coreutils) numfmt invocation\(aq
.PP
.br
Packaged by Debian (9.7\-2)
.br
Copyright \(co 2025 Free Software Foundation, Inc.
.br
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free to change and redistribute it.
.br
There is NO WARRANTY, to the extent permitted by law.