Lost Conversion Calculator: What Is Broken Tracking Costing You?
Enter your ad spend, reported conversions and order or lead value to see the conversions your ad platforms are missing.
Estimates only, based on the numbers you enter. Untracked conversions still happen, but your ad platforms cannot learn from them, so bidding gets worse over time.
Measure my real numbersHow the calculation works
If a share of conversions is not tracked, the conversions you see are only part of the total. The calculator divides your reported conversions by the tracked share to estimate the real total, then shows the difference, its value, and your real cost per conversion.
Why missing conversions matter
Smart Bidding in Google Ads and Meta’s delivery system learn from the conversions they receive. When conversions are missing, campaigns look less profitable than they are, good ads get switched off, and the algorithms optimise towards the wrong people.
Frequently asked questions
What share of conversions is usually untracked?
It varies a lot by audience, device mix, consent rates and setup, so there is no single number. That is why the slider is an assumption. An audit measures your real gap by comparing platform data with your orders or CRM.
Does server-side tracking recover all lost conversions?
No setup recovers 100%. Server-side tracking, the Conversions API, Enhanced Conversions and Consent Mode v2 together recover a large part of what browser-only tracking misses, while respecting user consent.
Are untracked conversions lost sales?
Usually not. The sale still happens, but your ad platforms do not get credit for it, so they cannot learn from it and your reports undervalue the campaigns that drove it.
Ready to fix your tracking and scale your ads?
Get a free audit of your tracking and ad account. Usually replies within 1–2 hours.
