How to Sync Google Calendar with Outlook Automatically

If you use both Google Calendar and Microsoft Outlook, you have probably experienced the frustration of having events in one that do not appear in the other. Perhaps you use Google Calendar personally but Outlook at work. Or your partner is on Gmail while you are on Microsoft 365.

Either way, the result is the same: you end up manually checking two calendars, copying events between them, or worse — double-booking yourself because you forgot to check the other one.

In this guide, we will look at the different ways to sync Google Calendar with Outlook, their limitations, and the best automated solution available in 2026.

Method 1: Subscribe to a Google Calendar ICS feed in Outlook

This is the most commonly suggested approach, and it is free. Here is how it works:

1. In Google Calendar, go to Settings > your calendar > Integrate calendar
2. Copy the "Secret address in iCal format" link
3. In Outlook, go to Add calendar > Subscribe from web
4. Paste the ICS link

The problems:

• One-way only. Google events appear in Outlook, but not the other way around. You need to repeat the process in reverse for two-way visibility.
• Slow updates. Outlook refreshes ICS subscriptions every 3-24 hours. Add an event to Google right now, and it might not appear in Outlook until tomorrow morning.
• Read-only. You cannot edit or delete synced events from the other side.
• No notifications. Subscribed calendar events do not trigger reminders in Outlook.

This method is fine for viewing a mostly-static calendar, but it is completely inadequate for day-to-day scheduling.

Method 2: Use a Power Automate or Zapier workflow

You can set up an automation that watches for new events in Google Calendar and creates them in Outlook (and vice versa). Tools like Microsoft Power Automate or Zapier can do this.

The problems:

• Complex setup. You need to create multiple flows — one for new events, one for updated events, one for deleted events — in each direction.
• Duplicate handling. Without careful configuration, events can bounce back and forth, creating infinite loops or duplicates.
• Cost. Zapier's premium plans start at US$20/month for calendar triggers. Power Automate requires a Microsoft 365 licence.
• Fragile. These automations break when APIs change, tokens expire, or rate limits are hit.

Method 3: CalendarBridge

CalendarBridge is a dedicated calendar syncing service that has been around since 2018. It syncs events between Google and Outlook calendars bi-directionally.

Pros:

• True two-way sync
• Handles updates and deletions
• Syncs every 15 minutes

Cons:

• Expensive. US$48/year (approximately A$75) for syncing just two calendars. Each additional calendar pair costs extra.
• Individual-only. Designed for syncing your own calendars across accounts. There is no concept of sharing calendars between different people (like family members or partners).
• US-based. Data is processed and stored on US servers.

Method 4: Calendar Circle (the best option)

Calendar Circle takes a different approach. Rather than just syncing two calendars you own, it creates a shared "circle" where multiple people can connect their calendars — regardless of platform — and see each other's events automatically.

But it works just as well for syncing your own Google and Outlook calendars together. Here is how:

For syncing your own calendars

1. Create a Calendar Circle account
2. Connect your Google Calendar
3. Connect your Outlook calendar
4. Events sync automatically between the two

For sharing with your partner or family

1. Create a circle and invite your partner/family
2. Each person connects their own calendar (Google, Outlook, or Apple)
3. Everyone sees each other's events in their own calendar app

Calendar Circle vs CalendarBridge: comparison

Feature	Calendar Circle	CalendarBridge
Two-way sync	Yes	Yes
Google + Outlook	Yes	Yes
Apple iCloud	Yes	No
Share with family/friends	Yes (up to 8 people)	No (individual only)
Privacy controls	Busy/free or full details	Limited
Price (annual)	From A$3.50/month	From A$75/year
Free trial	21 days, no card	21 days
Data hosting	Australia (AWS Sydney)	United States

Why sync speed matters

When you add an event to your Google Calendar at 9am and it does not appear in Outlook until 3pm, that is not just an inconvenience — it is a missed meeting waiting to happen.

Calendar Circle syncs events within minutes, not hours. When you add, update, or delete an event on one side, it reflects on the other side quickly enough to prevent scheduling conflicts.

Security and privacy

Calendar Circle uses OAuth for Google and Microsoft connections — the same secure sign-in method used by major apps. Your calendar password is never stored. All data is hosted on AWS Sydney servers and protected under the Australian Privacy Act.

You also have full control over what gets shared. Choose to share full event details, or just busy/free time slots so others can see when you are available without seeing what the event is about.

The bottom line

If you just need occasional visibility into a mostly-static calendar, ICS subscriptions will do the job (slowly). But if you rely on both Google Calendar and Outlook for your daily schedule, you need a proper sync solution.

Calendar Circle gives you automatic two-way sync between Google and Outlook, with the added benefit of being able to share your calendar with family members and friends — even if they use a completely different calendar app. And at a fraction of the cost of alternatives like CalendarBridge.

---

Related articles