| 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:
- up
- down
- from-zero
- towards-zero
- 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:
- abort
- fail
- warn
- 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 |