How to Delete a Calendar in Outlook: What You Need to Know

Managing calendars in Outlook can get cluttered fast — shared calendars from colleagues, old project calendars, imported holiday calendars, or duplicates that somehow multiplied over time. Knowing how to delete a calendar (and what actually happens when you do) keeps your Outlook organized and avoids the confusion of overlapping events.

This guide covers how calendar deletion works across Outlook's different versions and what to consider before you remove one.

Understanding Outlook Calendars: What You're Actually Deleting

Before hitting delete, it helps to understand what kind of calendar you're dealing with. Outlook supports several calendar types, and they behave differently:

• Personal calendars — calendars you created yourself inside Outlook
• Subscribed calendars — internet calendars (iCal/ICS feeds) you've added from external sources
• Shared/delegated calendars — calendars other people have shared with you via Exchange or Microsoft 365
• Import-based calendars — calendars added by importing an .ics file
• Default calendar — the primary "Calendar" folder tied to your email account

The default calendar cannot be deleted. It's built into your Outlook account structure. What you can delete are secondary calendars you've created or added on top of that default.

How to Delete a Calendar in Outlook on Windows (Desktop App)

The classic Outlook desktop app on Windows is where most workplace users live. Here's how deletion works:

1. Open Outlook and navigate to the Calendar view (bottom-left icon or keyboard shortcut Ctrl+2)
2. In the left panel, find My Calendars or Other Calendars
3. Right-click the calendar you want to remove
4. Select Delete Calendar
5. Confirm the deletion when prompted

When you delete a calendar this way, all events stored within that calendar are permanently removed. If you have important events there, export them first (File → Save Calendar) before deleting.

For subscribed internet calendars, the option may appear as Remove from Outlook rather than Delete, reflecting that you're unsubscribing from a feed rather than erasing locally stored data.

How to Delete a Calendar in Outlook on Mac

The Mac version of Outlook (especially the newer Microsoft 365 build) follows a similar path with slight UI differences:

1. Go to Calendar view
2. In the left sidebar, locate the calendar under My Calendars or Other Calendars
3. Right-click (or Control+click) the calendar name
4. Choose Delete Calendar or Remove Calendar

One notable difference: on Mac, Outlook may sync more tightly with macOS's native Calendar app depending on your configuration. If you've connected accounts through System Settings → Internet Accounts, a calendar deleted in Outlook may also disappear from the native Calendar app — and vice versa. Worth knowing before you delete.

How to Delete a Calendar in Outlook on the Web (Outlook.com / Microsoft 365)

Outlook on the web (OWA) is increasingly where Microsoft 365 users manage their accounts, and the calendar deletion process is slightly different:

1. Go to outlook.com or your organization's OWA portal
2. Click the Calendar icon in the left navigation
3. In the left panel, hover over the calendar you want to remove
4. Click the three-dot menu (⋯) that appears
5. Select Delete calendar or Unsubscribe (for internet calendars)

🗑️ Deleting a calendar through OWA is permanent and syncs immediately across all your connected devices — desktop app, mobile app, and web. There's no recycle bin for calendars.

How to Remove a Shared Calendar Someone Gave You Access To

This is a common point of confusion. If a colleague shared their calendar with you, removing it from your view doesn't delete their calendar — it just removes your access view.

• In the desktop app: right-click the shared calendar → Delete Calendar (or Remove from Calendar List)
• In OWA: hover → three-dot menu → Remove

The original calendar owner's data remains completely intact.

How to Delete a Calendar in the Outlook Mobile App

On iOS and Android, Outlook's mobile app handles calendars through the account settings rather than the calendar view itself:

1. Tap the hamburger menu (three lines) in the top-left
2. Tap the gear icon (Settings) at the bottom
3. Tap your account name under Mail Accounts
4. Look for Calendars within that account — here you can toggle calendars off or, for added accounts, remove the connected account entirely

📱 The mobile app doesn't always offer a standalone "delete calendar" option for secondary calendars created within Outlook. Deletion of those typically needs to happen via the desktop or web app, after which the change syncs to mobile.

Key Variables That Affect Your Approach

The New Outlook for Windows (the redesigned version Microsoft has been rolling out) mirrors the OWA interface more closely than the classic desktop app. If your Outlook looks different from the steps described, you may be running the New Outlook — check via Help → About Outlook.

Before You Delete: Things Worth Checking

• Export first if the calendar contains events you might need later
• Check who owns it — deleting a calendar you created in a shared mailbox may affect others
• Confirm sync scope — on Microsoft 365, calendar changes propagate across devices quickly; on IMAP or POP setups, behavior varies

Whether you're cleaning up a one-time project calendar, removing a subscribed sports schedule, or clearing out duplicates from a botched import, the process is straightforward — but the right path depends on which version of Outlook you're running, what type of calendar you're removing, and how your account is configured.