How to sync iPhone Calendar with Google calendar?

Except in the rare instance of a calendar only on the phone, all calendars sync to one or more email servers. So all you need to do is add the account that hosts the calendar to your phone.

Go to Settings/Calendar/Account, tap Add Account, and then Google, and follow the instructions.

Open Settings/Calendar/Accounts - do you see the gmail account, and does it say Calendar?

Then open the Calendar app, tap on Calendars, and make sure that calendar is checked.

OK, to be clear, your Apple calendar is not syncing from device to device; both devices sync to your calendar in iCloud.

Go to Settings/Calendar/Accounts. Do you see the account that hosts your google calendar? This might not be your personal google calendar, it may be calendar that your boss created and shared. To check this, log in to google.com and view the calendar on your computer.

You are correct. No information will be transmitted from your Google calendar to your iCloud calendar, and no information will be transmitted from your iCloud calendar to your Google calendar. That’s not how calendars work. The calendar app can display multiple calendars from different sources, but each one is a separate calendar. If you want your iCloud calendar entries on your Google calendar, log in to Google and add the iCloud calendar to your Google calendar page. You will have to add it as a CALDAV link, which is a little complicated, but can be done. Google has instructions on how to do that.

On your phone, tap the Calendar app.

Then tap on Calendars at the bottom of the screen.

You will see a list of calendars. Make sure the Google calendar is checked.

If you have the gmail calendar checked in the Calendar app, then that is not the Google calendar that is being shared with you. Log into Google with the same email address, and look at the Google calendar in a web browser.

You can’t share your Google calendar with your Apple calendar. You can ADD your Google Calendar to the calendar app on your iPhone and view it in the Calendar app.

Are you syncing your iPhone and laptop with a USB cable, or by setting up both your iPhone and Mac with a iCloud?