Two-way sync between Google Calendar™ and Google Sheets™ that won't time out, won't duplicate, and can never wipe your calendar.
Listing updated:August 12, 2026
Works with:
No reviews
1
Overview
CalWeave keeps Google Calendar™ and Google Sheets™ in step — in either direction, or both — without the three failures that plague calendar sync tools: timeouts on big calendars, duplicate rows on every re-import, and accidental mass deletions.

WHAT IT DOES
• Import calendar events into a clean, structured sheet: title, start, end, all-day flag, location, description, guests, calendar and status — filtered by date range, keyword or colour. Perfect for time tracking, client billing and reporting.
• Create, update and delete calendar events from spreadsheet rows. Type rows, mark them NEW, press Sync.
• Preview before anything is written. See exactly what a sync would create, update or delete — before it happens.
• Auto-sync on a schedule (hourly or daily), with calendar writes off by default for unattended runs.

WHY IT'S SAFE
• Delete safety cap: a single sync can never delete more events than the cap you set (default 5). A broken formula or a runaway sheet cannot empty your calendar — CalWeave stops and asks first.
• No duplicates: rows are matched to events by ID, so re-syncing updates in place instead of piling up copies. Unchanged rows are skipped entirely.
• No timeouts: large imports run in batches and resume automatically in the background until they finish.

PRIVATE BY DESIGN
Your calendar and spreadsheet data is processed inside your own Google account and never stored on external servers. The add-on requests the narrowest possible permissions, including access to only the single spreadsheet it is installed in.

PRICING
Free 14-day trial with every feature included — no card required. Then $24/year.

GETTING STARTED
Install, open a Google Sheets™ spreadsheet, choose Extensions → CalWeave → Open CalWeave, and use the one-click sample sheet to watch a sync work before touching real data. Setup takes about two minutes.

Google Calendar™ and Google Sheets™ are trademarks of Google LLC.
Additional information
PricingFree of charge trial
Privacy policy
Terms of service
CalWeave — Calendar & Sheets Sync will ask for the permissions shown below. Learn more
CalWeave — Calendar & Sheets Sync will need access to your Google account
This will allow CalWeave — Calendar & Sheets Sync to :
View and manage spreadsheets that this application has been installed in
View and edit events on all your calendars
See and download any calendar you can access using your Google Calendar
Allow this application to run when you are not present
Connect to an external service
Display and run third-party web content in prompts and sidebars inside Google applications
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
Reviews
Language:
Sort by:
Google doesn't verify reviews or ratings. Learn more about reviews
No comments
Search
Clear search
Close search
Google apps
Main menu