A Complete Guide to Syncing Your Google Calendar

The Gist

This is your guide to syncing your Google Calendar with other Google accounts, Outlook, and Apple Calendar. We'll give you step-by-step instructions for each scenario, plus some troubleshooting tips to make sure your calendars stay up-to-date across all your devices. If you're managing a lot of calendars, a tool like Caltsu can automate this for you.

Knowing how to sync your Google Calendar is essential if you're juggling multiple accounts, sharing schedules with a team, or using different calendar apps on your phone and computer. Below, you'll find simple, step-by-step instructions for the most common ways to sync your calendar.

Before You Start

Make sure you have a few things ready:

The login info for the Google account(s) you're using.
The login info for any other apps you're syncing with (like Outlook or Apple Calendar).
A clear idea of whether you need a one-way sync (where you can only view events) or a two-way sync (where you can edit them).

Tip: If you're managing multiple work and personal accounts, it's a good idea to turn on two-step verification for extra security.

Use this method when you want to let one Google account view a calendar that's owned by another account.

Sign in to the Google Calendar account that owns the calendar you want to share.
On the left side, under "My calendars," hover over the calendar, click the three-dot menu, and choose Settings and sharing.
Under "Share with specific people," click Add people.
Type in the email address of the person you want to share with.
In the permissions dropdown, choose "See all event details" (for view-only access) or a higher permission if they need to make changes.
Click Send. The other person will get an invitation in their email.

Time it takes: Less than 2 minutes.

⚠️ Warning: Be careful with the permission level you choose. Don't select "Make changes and manage sharing" unless you want the other person to have full control of your calendar.

How to Import a Calendar from One Google Account to Another

Use this method if you just want a one-time copy of events in another account. This will not keep the calendars in sync.

Sign in to the Google Calendar account you want to export from.
Click the three-dot menu next to the calendar → Settings and sharing → Export calendar.
A .zip file will download. Open it to find the .ics file inside.
Sign in to the other Google account and open Google Calendar.
Next to "Other calendars," click the + icon and choose Import.
Choose the .ics file you just downloaded, select the calendar you want to add it to, and click Import.

Note: This only imports a snapshot of the events. Any new changes you make won't sync between the accounts. This is best used for making backups or moving a calendar one time.

How to Sync a Google Calendar with Outlook

This section covers how to get your Google Calendar to show up in Outlook.

A. Add Google Calendar to Outlook (View-Only)

Open Google Calendar, click the three-dot menu next to your calendar, and go to Settings and sharing.
Under "Integrate calendar," copy the "Secret address in iCal format."
Open the Outlook desktop app and go to File → Account Settings → Account Settings → Internet Calendars → New.
Paste the URL you copied and click Add. Give the calendar a name and you're done.

B. Set Up a Two-Way Sync (Recommended)

The built-in options for syncing Google and Outlook aren't great for a true two-way sync. For that, you'll need another tool.

Use a trusted sync tool (like Caltsu) that supports a two-way sync between Google and Outlook.
Connect both your Google and Outlook accounts to the tool.
Choose which calendars you want to sync, the direction (one-way or two-way), and how you want to handle any conflicts.
Start the sync and watch the first run to make sure everything is working correctly.

⚠️ Warning: Using the iCal URL in Outlook will only give you a read-only view of your calendar, and it can be slow to update. For a real sync, you need a dedicated tool.

How to Sync a Google Calendar with Apple Calendar

A. On a Mac (Calendar App)

On your Mac, open System Settings (or System Preferences) → Internet Accounts.
Click Google, sign in, and allow access to your calendar.
Open the Calendar app. Your Google calendars will now appear on the left side.
You can check or uncheck the calendars to show or hide them.

B. On an iPhone or iPad

Open Settings → Mail → Accounts → Add Account → Google.
Sign in and make sure the Calendars toggle is turned on.
Open the Calendar app to see your Google events.

By default, the sync with Apple Calendar is a two-way sync, so you can edit events on any device.

Troubleshooting and Tips

Common Problems and Fixes

Are events missing?

Make sure you have the right calendar selected in the app.
Check to see if the event is hiding in a different calendar under your account.

Seeing duplicate events?

This usually happens when you've added the same calendar in two different ways (for example, with an iCal URL and also by signing in to your Google account). Remove one of them to fix it.

Are updates slow?

The iCal import method is slow by design. Use a direct connection to your account (by signing in) or a sync tool like Caltsu for faster updates.

Having permission issues?

Make sure the owner of the calendar gave you the correct permission level.

Quick Tips

Use different names and colors for your calendars so you can easily tell them apart.
Only sync the calendars you actually use to reduce clutter and speed things up.
Test your sync with a fake event before you rely on it for your real schedule.

A Note on Security and Privacy

Use modern, secure connections (called OAuth) whenever possible. They're safer than entering your password directly.
Be careful about the sharing permissions you grant. Only give the minimum access necessary.
Regularly review the third-party apps that have access to your Google account. You can do this in Google Account → Security → Third-party apps with account access.

What to Expect

After you've followed these steps, you should have:

Your calendars visible in the app or account you want them in.
Changes showing up correctly (either instantly for a two-way sync, or periodically for an iCal subscription).
Fewer missed meetings and a much clearer view of your schedule.

Check Your Work

Create a test event on one calendar and make sure it shows up (and can be updated or deleted) on the other.
Do one final check for duplicate events and to make sure your permissions are correct.

Ready to Simplify Your Calendar Sync?

If you manage a lot of calendars and need a reliable two-way sync across Google, Outlook, and Apple devices, Caltsu can simplify the setup and keep your calendars aligned automatically.

Ready to save time? [Try Caltsu] to start syncing your calendars without the headache.

How to Sync Google Calendar: Complete Guide