How To Connect Your Google Ads Pixel To Your Facebook Ads Pixel

Running ads on both Google and Meta? You need both pixels firing on the same conversions — otherwise you're double-counting, missing attribution, and optimizing blind. Here's how to connect them for unified tracking.

Why Connect Both Pixels?

• See which platform actually drove the conversion (not just the last click)
• Share audience data between Google and Meta for cross-platform retargeting
• Deduplicate conversions so you don't count the same sale twice
• Feed both platforms' machine learning with complete data

Step 1: Install Both Pixels on Your Website

Install the Meta Pixel base code in the <head> of every page. Install the Google Ads tag (or Google Tag Manager container) alongside it. Both should fire on all pages — the conversion events fire on specific pages like your thank-you or checkout page.

Step 2: Define the Same Conversion Events

Map the same events in both platforms: Purchase, Lead, Add to Cart, Complete Registration. Use the same event names so you can compare apples to apples. In Meta, these are “Custom Events.” In Google Ads, these are “Conversions.”

Step 3: Use a Shared Event ID for Deduplication

When both pixels fire on the same conversion, Meta and Google each count it. To prevent double-counting, pass a unique event_id with each event. Both platforms use this ID to deduplicate — Meta's Events Manager and Google's conversion settings both support it.

Step 4: Set Up Cross-Platform Audience Sharing

Export your Google Ads customer match list and upload it as a Meta custom audience. Do the reverse with your Meta audience. Now you can retarget Google searchers on Facebook and Instagram, and retarget Meta engagers on Google Display and YouTube.

Step 5: Use Server-Side Tracking (CAPI) for Both

Browser-based pixels lose 20–40% of data to iOS opt-outs and ad blockers. Set up Conversions API (CAPI) for Meta and Enhanced Conversions for Google. Both send conversion data server-side, recovering lost tracking and giving both platforms complete data for optimization.

Step 6: Build a Unified Attribution Dashboard

Pull conversion data from both platforms into one dashboard. Compare cost per conversion, ROAS, and assisted conversions side by side. You'll often find that Google drove the search and Meta closed the sale — or vice versa. Without both pixels connected, you'd never see the full picture.

We handle full cross-platform tracking setup — dual pixel installation, event mapping, deduplication, CAPI, and unified attribution dashboards. Know exactly which ads generate revenue, across every platform.