Blended ROAS Calculator
See your real, business-level return on ad spend — and how much each platform is over-claiming due to last-click overlap.
Inputs
Channels & revenue
$
Total revenue you actually received over the period — not a sum of platform reports.
$
$
$
$
$
$
Blended ROAS
3.65×
$95,000 business revenue ÷ $26,000 ad spend.
Platform-reported total
$82,000
Sum of every platform's claim.
Overlap / over-attribution
-$13,000
Platforms under-report vs source of truth — likely tracking loss.
Per-channel reality check
Meta Ads$12,000 spend
Reported ROAS
3.17×
Adjusted (no overlap)
3.67×
Google Ads$10,000 spend
Reported ROAS
3.50×
Adjusted (no overlap)
4.05×
TikTok Ads$4,000 spend
Reported ROAS
2.25×
Adjusted (no overlap)
2.61×
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Built by
Ariful Islam
Founder · 8+ years in tracking
$200K+earned on Upwork
Top Rated Plus
4.9/5 · 300+ engagements
