Calendar use limits

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

Error messages you might see

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

  • Unable to save event  You've 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.

How to fix the problem    

Prevent Calendar issues by knowing the use limits and following 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 may 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 may 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 G Suite users in your primary or secondary domain, will not consume this limit type. Users in your domain that are on non-G Suite systems are considered external.
  • It may 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 G Suite 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 may 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 may differ.

Increase your limits by converting to a paid account

Some limits are specific to trial accounts. The use limits for G Suite free edition, G Suite trial, or G Suite for Education are lower than G Suite paying editions.

At the end of your free trial period, those limits will be automatically increased when your domain is cumulatively billed for at least USD $30 (or equivalent). If you purchased your domain from Google, the amount required to increase your limits is USD $30 plus the cost of your domain.

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