Show HN: Numb – a tool for working with numbers, units and dates (written in Go) 

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numb is a tool for working with numbers, units and dates.

examples:

    $ numb
    Enter `q` to quit
   > 3735928559>> 16 in hex
      0xdead
   > 1920/1080 in rat
      16/9
   > sin(pi/3)
      0.87
   > 3 millilightsecond to mile
      558.85 mile
   > 10 mile/hour to metre/sec
      4.47 metre/sec
   > total_grains=2^64 - 1
      18446744073709551615
   > 3 GB / (15 Mbps) to minute
      26.67 minute
   > time in London
      13:04
   > today + 10 days
      05 Jun 2022
   > today - {1999-09-09} to months
      272.54 month

install:

    # build with Go>=1.16
    $ go install github.com/nkanaev/numb@latest

more:

    doc/help.txt     manual, examples
    doc/spec.txt     syntax, grammar
    doc/dump.txt     various design notes
    doc/todo.txt     todo list