---
title: "Why Do Facebook Ads and GA4 Report Different Conversion Numbers?"  
description: "Why Do Facebook Ads and GA4 Report Different Conversion Numbers?"  
author: "Tilak Mehta"  
published: 2026-10-14  
canonical: https://answers.mindstick.com/qa/117520/why-do-facebook-ads-and-ga4-report-different-conversion-numbers  
category: "Mix Category"  
tags: ["Facebook Ads", "GA4", "Digital Marketing"]  
reading_time: 1 minute  

---

# Why Do Facebook Ads and GA4 Report Different Conversion Numbers?

My Facebook campaign dashboard shows more purchases than I can find in GA4 for the same dates. I know the two platforms may count conversions differently, but the gap is large enough that I’m unsure which number to use when judging the campaign.

How do you usually investigate a mismatch like this? I’m especially curious about the effects of attribution windows, consent settings, and duplicate purchase events. What should I check first when comparing **Ads Manager conversion reporting** with GA4?


---

Original Source: https://answers.mindstick.com/qa/117520/why-do-facebook-ads-and-ga4-report-different-conversion-numbers

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.