Mar 9, 2026

How to Automatically Copy Events Between Google Calendars

Google Calendar doesn’t have a built-in feature to automatically copy events from one calendar to another. But there are three reliable ways to do it with external tools.

Why You’d Want This

The most common use case: you have a work Google Calendar and a personal Google Calendar (or two separate Google accounts), and you want events from one to automatically appear on the other — without manually duplicating them.

Other scenarios:

Showing a “busy” block on a shared team calendar whenever you add an event to your private calendar
Mirroring a calendar for backup
Keeping a project calendar in sync with your main calendar

Method 1: Zapier (No Code, Easiest)

Zapier connects Google Calendar accounts and copies events automatically.

Setup:

Create a free Zapier account
Create a new Zap: trigger = “New Event in Google Calendar” (source calendar)
Action = “Create Detailed Event in Google Calendar” (destination calendar)
Map the fields: title, start time, end time, description, location
Turn on the Zap

Result: Every new event added to the source calendar gets copied to the destination within minutes.

Tradeoffs:

Free plan has limited Zap runs (100/month) — enough for light use
Updates and deletions don’t sync automatically (you need separate Zaps for each)
Paid Zapier plan needed for full sync behavior

Method 2: Google Apps Script (Free, More Control)

Google Apps Script is Google’s built-in automation tool — free with any Google account, no extra service needed.

Setup:

Go to script.google.com and create a new project
Paste this script:

function copyEvents() {
  var sourceCalId = 'your-source-calendar@gmail.com';
  var destCalId = 'your-destination-calendar@group.calendar.google.com';

  var now = new Date();
  var future = new Date(now.getTime() + 7 * 24 * 60 * 60 * 1000); // 7 days ahead

  var sourceCal = CalendarApp.getCalendarById(sourceCalId);
  var destCal = CalendarApp.getCalendarById(destCalId);
  var events = sourceCal.getEvents(now, future);

  for (var i = 0; i < events.length; i++) {
    var event = events[i];
    // Check if already copied (using description tag)
    if (event.getDescription().indexOf('[COPIED]') === -1) {
      destCal.createEvent(
        event.getTitle(),
        event.getStartTime(),
        event.getEndTime(),
        {description: event.getDescription() + '\n[COPIED]', location: event.getLocation()}
      );
      event.setDescription(event.getDescription() + '\n[SYNCED]');
    }
  }
}

Replace the calendar IDs with yours (find them in Google Calendar settings → Integrate calendar)
Save the script
Set up a trigger: clock icon → Add trigger → copyEvents → every hour (or every 15 minutes)

Result: The script runs on your chosen schedule and copies any new events from source to destination.

Tradeoffs:

Free, no third-party service needed
Requires basic comfort with code (copy-paste level)
Doesn’t handle updates or deletions without additional logic
Can create duplicates if not carefully managed

Method 3: CalendarBridge (Purpose-Built, Two-Way)

CalendarBridge is a dedicated tool for syncing calendars across accounts, including two-way sync and deletion propagation.

What it does:

Copies events from one Google Calendar account to another
Shows “Busy” blocks on the destination calendar (to protect privacy while showing availability)
Syncs updates and deletions
Works across Google ↔ Google, Google ↔ Outlook, and Outlook ↔ Outlook

Setup: Connect your accounts, choose which calendars to sync, configure what details to show (full event details or just “Busy”).

Tradeoffs:

Paid service (free trial, then ~$4–8/month)
Most reliable and full-featured option for true two-way sync

Which Method to Use

Need	Best method
Simple one-way copy, free	Zapier (free tier) or Apps Script
Two-way sync with deletions	CalendarBridge
No third-party services	Apps Script
Work ↔ Personal Google accounts	CalendarBridge
Show “busy” without sharing details	CalendarBridge

What Google Calendar Doesn’t Do Natively

Google Calendar has no built-in “copy events to another calendar automatically” feature. You can manually move an event to a different calendar (edit event → change the calendar dropdown), but that removes it from the original. Copying requires one of the methods above.