How to Sync Trello Cards with Google Calendar Events Automatically

How to Sync Trello Cards with Google Calendar Events Automatically

Share key business milestones, campaign or product launch dates, and other time-sensitive information by learning to sync Trello and Google Calendar with Unito’s automated two-way workflow. This Trello – Google Calendar flow has two goals:

  • Create a 2-way sync between Trello and Google Calendar that allows specific cards or events created in one tool to appear in the other. 
  • Set specific rules to update each tool immediately after making changes in the other so the latest information is always available and up to date in both Trello and Google Calendar.

Why sync Trello cards to Google Calendar events?

Syncing Trello cards from your board to a shared Google Calendar makes sense for any Trello user. This use case can offer some inspiration, but it is far from the only way to use this workflow. So let’s imagine there’s a marketing team in Trello planning their roadmap with a board that includes all the conferences (and dates) they’ll be sponsoring and/or attending in 2023. Each event could have its own card with a list of attendees, details, dates and times, etc. They could build a flow with Unito to sync any cards related to the conference schedule into a shared Google Calendar. If any changes are made to a card or related event, the other will be automatically updated. That’s the power of learning how to sync Trello with Google Calendar.

Trello and Google Calendar with a two-way Unito sync
Here’s a Trello board synced to Google Calendar with Unito’s two-way integration. Unito enables you to sync single or multi-day events, as well as end times.


Feel free to skip ahead if you’re already in the middle of building this workflow:

Step 1. Connect Trello and Google Calendar to Unito

Step 2. Set a flow direction from Trello to Google Calendar

Step 3. Set rules to create Google Calendar events based on specific Trello Cards

Step 4. Set field mappings between Trello cards and Google Calendar events

Add Unito to your Trello Board (optional)

This step is for users who wish to add Unito as a Power-Up to an existing Trello board. You can skip this process if you’ve already installed Unito or are using the platform directly. Otherwise, click here if you need help adding Unito as a Trello Power-Up. Just don’t forget to come back to our guide!

Unito Power-Up Google Calendar Trello
Pick the Unito Power-Up that best matches your app needs

Watch this Trello-Google Calendar sync in action:

Step 1. Connect Trello and Google Calendar to Unito

Navigate to the Unito App and select +Create Flow. On the next screen, select Start Here to connect Trello and Google Calendar. Choose the accounts you want connected to Unito. You’ll need to specify which account, board, and calendar you wish to sync.

Trello to Google Calendar Tool Selection
Our connected Trello Board and Google Calendar

When you connect Google Calendar to Unito for the first time, make sure to select every box in order for your flow to function properly.

You must check every box at this stage of the OAuth process for the integration to function. If you skip this step, disconnect your Google Calendar account from Unito and reconnect it.

When you’re ready, hit Confirm.

Step 2. Set a flow direction from Trello to Google Calendar

Your data can sync either from one tool to the other, or bidirectionally. If we wanted each tool to be able to create a card or event in the other, we could choose a 2-way flow.

Since our goal in this guide is to maintain visibility in Google Calendar on new conferences added to the roadmap in Trello, we’ll choose a 1-way flow from Trello to Google Calendar.

Trello to Google Calendar Flow Direction with Unito

Step 3. Set rules to create Google Calendar events based on specific Trello Cards

Now we can set up rules to determine which trigger events will send data between our tools. This is our chance to filter out unrelated Trello cards from our Unito flow to Google Calendar.

A great way to filter your cards is by using proper labels and color coding in each tool. If you haven’t already done so, head to and set a name and color for your shared calendar. Then, stop by to create and apply labels to any cards related to your events. These are what Unito will use to identify cards you want it to sync with new events. If you’re looking for inspiration, check out Unito’s guide on how to make the most out of your Trello labels.

When you’re ready, select Add a new trigger to to sync those labeled cards with your specified Google Calendar.

Setting rules for a Unito 2-way sync between Trello and Google Calendar

In our demo, we assigned the label “Conference” to any Trello cards related to our schedule. In the above example, only Trello cards with that label will create matching events in our calendar.

Find out more about setting rules.

Step 4. Set field mappings between Trello cards and Google Calendar events

When you open this screen, you’ll be asked if you want to set up your mappings from scratch or let Unito do it automatically. The details of your cards and events are considered fields that need to be mapped (or matched). If you map the description of your card to the description of your event, you’ll see the same information appear in both places.

Your fields will be automatically mapped for two-way updates. That means any changes in one project will be applied to the other. With a one-way sync between fields, only changes to the source field will make changes to the destination field.

Learn more about which fields can be mapped for Trello and Google Calendar.

Click + Add mapping to sync additional fields, then Select a field for each tool and find the field you wish to map.

Unito 2-way field mapping sync between Trello and Google Calendar

NOTE: Unito identifies members and guests by their email address. In order for guests to sync properly, the contact and their email address must appear in, or be added to, both Trello and Google Calendar.

Click Confirm when you’re satisfied with your field mappings to proceed.

Find out more about field mappings.

Step 5. Save, close, and launch your Trello – Google Calendar flow!

And that’s it! You’ve just completed a flow between Trello and Google Calendar. Congratulations!

If you’ve followed the steps above, your flow will now: 

  • Create a card in Trello for every new Google Calendar event with a yellow label created by a specified user.
  • Create an event in Google Calendar for every Trello card labeled “Milestone”
  • Sync dates, times, guests, card/event titles and descriptions between your tools and keep them up to date in real-time.

If you have any questions, don’t hesitate to reach out and let us know. Our live support team is ready to jump in and lend a hand to make sure your flows always function as intended.

What’s next?