Simple way to convert HH:MM:SS (hours:minutes:seconds.split seconds) to seconds

Question

What\'s an easy way to convert 00:20:40.28 (HH:MM:SS) to seconds with a Bash script?

Split seconds can be cut out, it’s not essential.

Answer 1

You can convert minutes to hour, seconds, or minutes with bc command.

By example:

How many minutes for 1000 sec ?

$ echo 'obase=60;1000' | bc
02 00

then -> 2 min

How much hour for 375 min ?

$ echo 'obase=60;375'| bc
06 15

then -> 06h15

How days for 56 hours?

$ echo 'obase=24;56' | bc
02 08

then 02 days and 08 hours

bc with obase is extra!