Avoid Calendar use limits

To protect users and domains from abusive behavior, Google sets limits for Google Calendar use. 

These limits are above the activity level of typical Calendar users, so most users won't exceed them. If you do exceed these limits, however, your Google Calendar might become read-only for a few hours. You can still view events when your calendar is read-only, but you can't create or edit events. 

Note: Calendar keeps events indefinitely as long as the user does not delete them.

Errors related to use limits

If you exceed Calendar use limits, you might get messages such as: 

  • Unable to save event—You reached the limit for the number of events you can edit.

  • Calendar usage limits exceeded—Results from an API call.

  • There was a problem saving your changes. Please try again in a few minutes—Message is followed by more information describing what limit was reached.

Avoid exceeding limits     

To avoid exceeding Calendar limits, follow these guidelines. 

Don't... Limit 

Create too many events

  • If you create more than 100,000 events in calendar during a short period, you might lose calendar edit ability for a few hours.
  • It might take several months until this limit type is fully replenished.
100,000 events*

Create too many calendars

  • If you create more than 60 new calendars in a short period, your calendar might go into read-only mode for several hours.
  • It might take several hours until this limit type is fully replenished.
60 calendars*

Send too many invitations to external guests

  • To prevent spamming, Google Calendar limits the number of invitations a user sends to external guests. If a user sends 10,000 invites in a short period, the user’s calendar might go into read-only mode.
  • Inviting Google Workspace users in your primary or secondary domain will not consume this limit type. Users in your domain that are not on Google Workspace systems are considered external.
  • It might take several days until this limit type is fully replenished.
10,000 invites*

Email too many guests via Google Calendar events

  • To prevent spamming, Google Calendar limits the number of emails a user can send to external guests with the ‘Email Guests’ feature.
  • Using the ‘email guests’ feature with Google Workspace users in your primary or secondary domain does not consume this limit type.
  •  This limit replenishes gradually within 24 hours.
~2,000 emails*

Share calendars with too many users

  • If you share calendars with many users in a short period, you might lose the ability to share calendars for a few hours.
  • It might take several hours until this limit type is fully replenished.
750 shares*

*This number is true only if a user’s limits are fully replenished. If a user does any actions in this table regularly, then the actual use limit might differ.

Additional use limits for free & trial accounts

For the legacy free edition of G Suite and Google Workspace trial accounts, limits are lower than those stated above.

Some Calendar use limits are automatically increased when your domain has cumulatively paid at least USD $100 (or equivalent), and at least 60 days have passed since achieving that payment threshold. If you purchased your domain from Google, the amount required to increase your limits is USD $100 plus the cost of your domain.

Important: Calendar use limits are not increased during your trial period. Your account must have started a subscription and ended the trial period before these limits can be increased. 

To end your trial and convert to a paid account, go to Set up Google Workspace billing. To make a manual payment, see Make a manual payment or pay early.

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