How to use Google Calendar with multiple accounts (see them together, and keep them from double-booking)

Calendar app on Android and iPhone

Google Calendar Help says you can add more than one account in the Calendar app, and that you can find and manage events from different accounts in one app.

To add another account:

1. On your Android phone or tablet, or on your iPhone or iPad, open the Google Calendar app.
2. At the top right, tap your profile photo, then Add another account.
3. Follow the sign-in steps on the screen.

Google Calendar Help says when you add a new Google Account, it becomes the one you use. Your profile photo shows which account you use. To switch between accounts, tap your profile picture and select a different account you have turned on. Help also says to set the screen to portrait mode before you switch.

To show or hide calendars from accounts you turn on:

1. Open the Calendar app.
2. At the top left, tap Menu.
3. Select the calendars you want to display in the grid.

Your current account is at the top of the Menu. Other accounts you turn on are below it. That is how several Google accounts appear together on a phone. This page does not cover adding a local or third-party calendar such as Outlook or Apple Calendar; Google Calendar Help documents those separately, and Resync does not sync them.

Google Calendar Help steps checked Nov 1, 2026. Cited from Add another account to Google Calendar and Switch between accounts in the Google Calendar app.

Web: one account per tab

On a computer, open Calendar in a web browser at calendar.google.com. That tab shows the calendars for one Google Account.

Google Account Help says you can sign in to multiple accounts at once and switch without signing out. On the top right, select your profile image or initial. Choose Add account to sign in to another account, or select the account you want to use. Accounts have separate settings. Switching accounts shows that account's Calendar. It does not overlay the first account's events in the same grid.

To see both in one web tab, share one calendar into the other account. In Settings and sharing, add the other Google account and choose See only free/busy (hide details) or See event details. The other account adds it from the invite email. It shows under Other calendars. You can also subscribe from Other calendars on a computer. Those steps, plus export and import, are in the merge calendars guide. Sharing as free/busy versus writing holds is in the busy-time guide. The two-calendar sync guide covers sharing and iCal URL subscriptions across accounts.

Google Calendar Help and Google Account Help steps checked Nov 1, 2026.

Desktop

Google's Access Calendar help lists a web browser, the Android app, and the iOS app. A desktop shortcut just opens calendar.google.com. There is no official Google Calendar desktop app in that list.

On a computer, use a browser. To keep two Google Accounts open side by side, Access Calendar documents Chrome browser profiles: open Chrome, select Profile, then Add Chrome profile, and sign in to each profile with a different Google Account. Each profile's Calendar tab is still one account.

Third-party desktop calendar clients exist. This page does not name or price them. Whether a client can show several Google accounts in one window depends on that client. A combined desktop view still does not write busy time onto the other account.

Google help steps checked Nov 1, 2026.

Why a combined view does not stop double-booking

Overlaying two accounts lets you see when you are busy. It does not hold the time on the calendar other people use.

• Other people booking your work calendar see that calendar. They do not see the personal overlay you turned on in the app or under Other calendars.
• The other account's free/busy is still that account's own events. Find a time on that account does not include the first account unless that calendar is actually on the account being booked.
• An appointment-schedule booking page only checks extra calendars if that account's owner turns that on and selects them. Checking secondary calendars needs an eligible Workspace or Google One plan.

Use a combined view when you are the one picking a time. Use Busy holds when colleagues or a booking link should see you as busy without opening your other account. The avoid double booking guide covers that case in more detail.

Google Calendar Help steps checked Nov 1, 2026.

When to sync Busy holds with Resync

Use the Calendar app or a shared overlay when you only need to see the other account. Use Resync when a different Google account's calendar should treat that busy time as busy — for example a personal Gmail calendar and a work Google Calendar.

Resync does not merge calendars and does not share them with each other. It reads when you are busy on Google calendars you mark as sources and writes hold events onto Google calendars you mark as mirrors. $1.50/month or $9/year after a 30-day free trial, no credit card required.

• Holds are titled Busy. Description, location, attendees, and conference data are left empty, so source meeting details stay on the source calendar.
• When you mark calendars as both source and mirror, a booking on either calendar becomes a Busy hold on the others. That is two-way blocking between those Google calendars.
• If a source event moves, Resync updates the hold. If the event is cancelled, marked free, declined, or is a working-location event, Resync does not keep a hold.
• Resync looks 90 days ahead when it reads source events. Holds it writes are marked so they are not copied again.
• Resync watches source calendars and updates holds when those events change. A polling fallback also runs about every 5 minutes.
• If you delete or edit a hold, Resync records that and does not recreate it for the same source event on that mirror.
• Read-only calendars cannot be mirrors. Resync currently syncs Google calendars only.

Set up Resync

1. Sign in with GoogleOpen Resync and sign in with the Google account you want as your primary account. You land on setup.
2. Connect another Google accountChoose Connect another Google account and finish Google's permission screen. Resync needs at least two Google accounts before you can start.
3. Start syncingWhen a second account is connected, setup shows bidirectional mirroring as the intended default: real events on either side become private busy blocks on the other. Choose Start syncing to open the dashboard.
4. Mark sources and mirrorsIn Sync configuration, turn on Source to read busy time from a calendar and Mirror to receive Busy holds. A calendar can be both. Read-only calendars cannot be mirrors because Resync needs write access to create holds.

What is and isn't copied

Resync copies the source event's start and end so the hold occupies the same window. It does not copy meeting details.

• Copied: start time, end time, and time zone. The hold is titled Busy and marked so Resync can find it later.
• Not copied: source title, description, location, attendees, conference data, or attachments. Those stay on the source calendar.
• Not mirrored: events marked free, events you declined, and working-location events. Holds Resync already wrote are skipped so Busy blocks are not copied back.
• If you delete or edit a hold, Resync records that change and does not recreate a hold for the same source event on that mirror.
• People with free/busy access on the mirror see a Busy block. People who can see event details still see the title Busy, not the source meeting name. If the source event is Private, the hold is Private. Otherwise the hold uses default visibility.

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