To see if someone's instantly free or busy in Calendar
- In Google Calendar, click and select Labs.
- Scroll to Free or busy and click Enable.
- At the bottom of the page, click .
- At the right of the calendar, enter the email address of the person you want to see and press Enter.
The person’s status appears as Free or Busy under their name.
Note: Friends must have already shared their Google Calendars with you.