Google Calendar sync can mean three different things: keeping the same account current on your devices, viewing another person's calendar, or copying events between separate accounts. Pick the method that solves your actual problem before connecting another service.
For a professional working across company accounts, the important question is: which calendar do other people check before booking you? Seeing all your calendars in one app is useful, but does not by itself create Busy blocks in every account.
Choose the right Google Calendar sync method
| Your goal | Start with | What to check |
|---|---|---|
| Same calendar on phone and laptop | Sign into the same Google account | Calendar enabled on each device; refresh and connection |
| See or collaborate on another calendar | Google calendar sharing | Owner's permissions and company policy |
| Copy a one-time archive | Export and import | Imports do not keep updating |
| Read a published external calendar | URL subscription | Read-only access; receiving service controls refresh |
| Copy ongoing commitments across accounts | A sync tool with the needed direction | Write permissions, privacy, filters and plan limits |
Google's calendar-sharing documentation explains permission levels. Sharing can allow viewing or editing; it is not always read-only. It gives access to the shared calendar rather than creating a separate copy in your calendar.
Before paying for sync, check whether your booking tool can already read all the calendars you need. If it can, copying events may be unnecessary.
How to sync two Google Calendars in different accounts
SYNCDATE copies selected events between accounts you connect. Choose Push to copy in one direction, or Mirror for two-way copying between writable calendars.
- Sign in to SYNCDATE and connect both Google accounts.
- Select the actual calendars you need, rather than every calendar offered by each account.
- Choose direction: personal into work only, or both calendars receiving each other's events.
- Review appearance and filters. Keep Busy titles and exclude private details if colleagues should only see unavailable time.
- Start the sync, then create a harmless test event in the selected source calendar. Verify its copy in the destination, move it, then delete it and check again.
- For a Mirror, repeat from the other calendar. Confirm your booking tool reads the intended destination and its Busy status.
Free covers 2 accounts, 2 calendars and 1 sync with a 30-day forward window. This fits one work/personal pair with shared appearance settings. The personal-to-work Busy recipe provides a one-way starting point.
If you need personal events masked at work but work titles visible in personal in the same Mirror, Pro supports appearance per destination. Free and Plus share those settings within a sync. Check the plan comparison before choosing.
Syncing three or more calendars
Every calendar needs shared availability: create one Mirror containing every writable calendar. Plus holds up to 4 calendars in one Mirror; Pro holds up to 5. A pair A↔B followed by B↔C does not relay A's copied events to C. Use the multi-account Mirror recipe.
Only one calendar needs a consolidated view: create one Push with the client calendars as sources and your hub as the destination. Plus supports up to 10 calendars in one Push, including the destination; account and complexity limits also apply. The hub receives copies but does not send them back to clients. Use the client-calendar hub recipe, checking its title settings before copying confidential client names.
Plan totals are separate: Plus covers 5 accounts, 20 calendars across syncs and 5 syncs; Pro covers 20 accounts, 100 calendars across syncs and 20 syncs. These totals do not increase the per-sync limits above.
For example, a consultant with two company calendars and one personal calendar can use one three-calendar Mirror on Plus. Five calendars mirroring each other need Pro. More than five in one Mirror exceeds standard per-sync limits; do not chain smaller syncs as a workaround.
The multi-calendar guide walks through the arrangements. Compare current prices and complete limits.
Google Calendar with Outlook or iCloud
For Google and Outlook, connect each account and choose direction based on where you need copies. Your employer may require administrator approval. The Outlook–Google recipe provides a two-way starting point for writable calendars.
For Google and iCloud, connect iCloud as a CalDAV account with an Apple app-specific password if you need writes in both directions. An iCal subscription URL remains read-only. Follow the iCloud connection and verification guide.
A read-only calendar can supply events for a Push but cannot receive copies or participate as a writable Mirror calendar. No subscription tier changes the permissions granted by the account owner or administrator.
How quickly do changes appear?
Google's push notifications tell a subscribed service that something changed; the service must then fetch and process the change. A notification is not proof that a destination event was written. Polling checks for changes periodically instead.
SYNCDATE uses Google and Outlook notifications and polls CalDAV sources. Provider delays, throttling and retries can affect arrival times. Buying a plan does not guarantee that every update arrives within a fixed number of seconds.
A URL subscription is a different path: the receiving calendar service fetches the published feed on its own schedule. Refreshing a phone app is not necessarily a request to refresh that server-side subscription.
Troubleshooting a missing event
Present on the provider's website but missing on the phone: check the phone's selected account, calendar visibility and refresh. That points to the device's view of the calendar rather than proving the cross-account copy failed.
Missing in the destination calendar itself: check the selected source and destination, direction, write permissions, exclusions and forward window. Read any dashboard error affecting the sync. Reconnect an account when its authorization needs repair, not as the first response to every delay.
Only some events are missing: confirm they belong to the selected source calendar and pass its filters. Recurring series and provider-specific event types have additional limitations; consult known limitations.
Duplicates: check whether a subscription overlay and a copied event are both visible, and whether another service is writing to the same calendars. Identify the original and copies before deleting anything. Do not create a second sync to repair an unexplained first sync.
Unexpected details visible at work: review title, description, location and guests. Test what the destination actually displays. A Busy title does not hide details that you separately chose to copy.
Choosing a tool and deciding whether to pay
Start from your account providers, required direction, number of calendars in one arrangement and privacy needs. Then compare the full price for those requirements. A total calendar allowance, a per-user allowance and a count of sync configurations are different units.
SYNCDATE is designed for copying events across your connected calendars. If you want booking links or automatic task scheduling as well, include those requirements when comparing alternatives. Our seven-tool comparison links to current vendor sources and explains the tradeoffs.
Use Free if its single two-calendar sync and forward window fit. Consider Plus for a supported multi-account arrangement or a longer window, and Pro when you need its larger limits or per-destination appearance within one sync. Check the plan for your calendars before starting a paid subscription.
Choose a specific setup
Need work and personal availability? Use the double-booking guide to check which calendar needs a copy. Mixing Google and Microsoft? Choose the Google–Outlook method, or follow the two-way walkthrough if you need copies in both accounts.
Frequently asked questions
Can Google Calendar sync across my own devices without a paid tool?
Yes. Sign into the same Google account and enable the calendar on each device. Copying events between separate company or personal accounts is a different task.
Can sharing a Google Calendar allow editing?
Yes, if the owner grants the appropriate permission and company policy permits it. Sharing gives access to the original calendar; it does not automatically make a separate copy on another calendar.
How do I sync three Google Calendars?
For shared availability, put all three writable calendars in one Mirror on Plus or above. For one consolidated view, use a Push from two source calendars into one hub. Separate syncs do not relay copies onward.
Will sync automatically make my booking link accurate?
Only if the booking tool checks the calendar receiving the copies and treats those events as unavailable time. Verify a test event and the resulting availability. Processing delays still leave a window for conflicts.
What should I check before upgrading?
Count accounts, syncs and calendars both in total and per sync. Check the forward window and whether each destination needs different appearance settings. A higher total allowance does not remove the per-sync cap.