How to Subscribe to a Google Calendar in Outlook

This is the reverse of the usual Outlook-to-Google direction: you want a Google Calendar to appear inside Outlook or Microsoft 365. There's no connect button — you subscribe to the Google calendar's ICS feed. Google exposes one for exactly this.

Step 1 — get the Google calendar's secret ICS address

1. Open Google Calendar on the web.
2. Hover the calendar under My calendars, click the three dots → Settings and sharing.
3. Scroll to Integrate calendar. Copy the Secret address in iCal format — the URL ending in .ics.

Treat that URL like a password: anyone who has it can see the calendar. Use the secret address (not the public one) unless the calendar is meant to be world-readable.

Step 2 — add it in Outlook

1. In Outlook on the web, go to Calendar → Add calendar → Subscribe from web.
2. Paste the Google .ics URL, give it a name, and save.

The Google calendar now shows up as a read-only calendar in Outlook. Edits stay one-way: you change events in Google, Outlook only displays them.

The catch: Outlook refreshes slowly, and you can't change that

Outlook decides on its own schedule how often to poll a subscribed feed — often only every several hours to a day. There is no setting, anywhere, that speeds up Outlook's poll interval, and no tool can force it — not us, not any third party. A change you make in Google can take hours to appear in Outlook. That's a limit of how Outlook consumes ICS subscriptions, and it's worth knowing before you rely on near-instant updates.

Where CalConverter helps — and where it doesn't

CalConverter accepts any public HTTPS or webcal ICS URL, so you can route Google's feed through it to get a single stable URL and clean, standards-compliant output — handy if the raw feed ever misbehaves in Outlook.

Two honest caveats:

• We can't make Outlook check more often. The slow refresh above is entirely Outlook's; putting a converter in front of the feed changes the data, not Outlook's polling schedule.
• Google's own feeds are already standards-compliant, so the time-zone repair that helps so much with Outlook feeds usually has little to fix here. The converter's value in this direction is a stable URL and a clean pass-through, not a time-zone rescue.

Going the other way?

For the far more common Outlook-to-Google direction — where the time-zone repair really matters — see Office 365 to Google Calendar integration.