Convert all number abbreviations to numeric values in a text file

Question

I'd like to convert all number abbreviations such as 1K, 100K, 1M, etc. in a text file into plain numeric values such as 1000, 100000, 1000000, etc.

So for example, if I have the following text file:

1.3K apples
87.9K oranges
156K mangos
541.7K carrots
1.8M potatoes

I would like to convert it to the following in bash:

1300 apples
87900 oranges
156000 mangos
541700 carrots
1800000 potatoes

The command I have used is to replace matching strings of number abbreviations with their full numeric values like so:

sed -e 's/1K/1000/g' -e 's/1M/1000000/g' text-file.txt

My problem is that I cannot find and replace ALL of the possible number abbreviations when variation occurs. I'd like to do this until at least up to one decimal abbreviations.

Answer 1

Use numfmt from GNU coreutils, don't reinvent the wheel.

$ numfmt --from=si <file
1300 apples
87900 oranges
156000 mangos
541700 carrots
1800000 potatoes

If abbreviated numbers may appear as any field, then you can use:

numfmt --from=si --field=- --invalid=ignore <file

Answer 2

Could you please try following, written and tested with shown samples in GNU awk.

awk '
{
  if(sub(/[kK]$/,"",$1)){
    $1*=1000
  }
  if(sub(/[mM]$/,"",$1)){
    $1*=1000000
  }
}
1
' Input_file

Explanation: Adding detailed explanation for above.

awk '                     ##Starting awk program from here.
{
  if(sub(/[kK]$/,"",$1)){ ##Checking condition if 1st field ends with k/K then do following. Substituting k/K in first field with NULL here.
    $1*=1000              ##Multiplying 1000 with current 1st field value here.
  }
  if(sub(/[mM]$/,"",$1)){ ##Checking condition if 1st field ends with m/M then do following. Substituting m/M in first field with NULL here.
    $1*=1000000          ##Multiplying 1000000 with current 1st field value here.
  }
}
1                         ##1 will print current line here.
' Input_file              ##Mentioning Input_file name here.

Output will be as follows.

1300 apples
87900 oranges
156000 mangos
541700 carrots
1800000 potatoes