Add Seconds to Time – Excel & Google Sheets

This tutorial will demonstrate how to add seconds to a time in Excel and Google Sheets.

Add Seconds

In Excel, time is stored as a fractional value where each 1/24th represents one hour of the day. So one second is 1/24/60/60 = 1/86400.

=B3/86400

To add a second add 1/86400 to a time

=B3+(1/86400)

or 59/86400 to add 59 seconds:

=B3+(59/86400)

Add Second to Now

To add a second to the current time, add 1/86400 to the NOW Function:

=NOW()+(1/86400)

Add Seconds Google Sheets

All of the above examples work exactly the same in Google Sheets as in Excel.