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Blended ROAS Calculator
See the gap between what each ad platform reports and what your store actually earned.
Your numbers
$
From your store, not an ad platform
$
$
$
$
$
$
$
$
Starting values are examples. Replace them with your own figures.
Results
Blended ROAS
4.00x
Total store revenue ÷ total ad spend
Platform-reported ROAS (combined)
4.17x
Platforms over-report by
4.2%
Negative means the platforms claim less than your store earned
Meta ROAS
4.00x
Google ROAS
4.50x
TikTok ROAS
4.00x
Total ad spend
$30,000
Revenue the platforms claim
$125,000
The formulas
- Blended ROAS = total store revenue ÷ total ad spend across all channels
- Channel ROAS = revenue a platform reports ÷ that platform's spend
- Over-reporting % = (sum of platform-reported revenue − actual revenue) ÷ actual revenue
How to read the result
Each platform counts conversions its own way and can claim a sale that another platform also claims, so the platform figures can add up to more than the revenue your store received. Blended ROAS cannot be double-counted, which makes it the number to judge the business by.
Use channel ROAS to compare channels with each other, and check the over-reporting figure before moving budget based on any single platform.