How to Calculate True ROAS Across Meta, Google, and TikTok Ads

Meta Ads Manager says your ROAS is 4.2x. Google Ads reports 5.8x. TikTok claims 3.1x. You made $12,000 in revenue last month — but these platforms are claiming combined attribution of $34,000. Something doesn't add up.

This is the attribution problem every performance marketer faces. Platform-reported ROAS is almost always inflated. Here's how to calculate your true blended ROAS and make smarter budget decisions.

Why platform ROAS is wrong

Attribution windows

Meta and Google both claim credit for any conversion that happened within their attribution window — which can be 7, 14, 28, or even 90 days after an ad click or view. One customer might be attributed to Meta (clicked an ad 3 days ago), Google (clicked a search ad yesterday), and TikTok (viewed an ad last week) simultaneously. Three platforms claiming credit for one $100 sale = $300 in claimed revenue.

View-through attribution

If you have view-through attribution enabled, a customer who saw your ad but never clicked can still be counted as a conversion. On Meta especially, this inflates reported ROAS dramatically because billions of people see ads every day.

Cross-device tracking gaps

A customer who sees your ad on mobile and converts on desktop later often shows as an unattributed conversion — deflating some platform numbers while inflating others.

How to calculate true blended ROAS

The most honest metric is blended ROAS: your total revenue divided by your total ad spend across all platforms, regardless of attribution.

What's a good blended ROAS?

• Under 1x: You're losing money on ads. Stop or restructure immediately.
• 1x–2x: Marginal. After COGS and fixed costs, you're likely unprofitable.
• 2x–3x: Acceptable. Profitable for high-margin digital products; break-even for physical goods.
• 3x–5x: Healthy. Gives you room to scale while staying profitable.
• 5x+: Excellent. Consider increasing spend while this efficiency lasts.

Platform-specific ROAS benchmarks

Meta Ads

• Average ROAS across industries: 2.5x–4x (7-day click attribution)
• Use 7-day click only attribution for the most honest comparison
• Disable view-through conversions for cleaner data

Google Ads

• Average ROAS: 3x–5x (last-click attribution)
• Search campaigns typically have higher ROAS than display — compare them separately
• Use data-driven attribution if you have enough conversion volume

TikTok Ads

• Average ROAS: 1.5x–3x (newer platform, less intent-based traffic)
• Works best for discovery-stage products and broad audiences
• Don't compare TikTok ROAS directly to Google Search ROAS — different funnel stages

The right way to measure ad performance with Fold

Fold pulls your actual revenue from Stripe (or any other payment provider) and your actual ad spend from Meta, Google, and TikTok — and calculates your blended ROAS automatically. No manual data pulling, no spreadsheets. You see "you spent $4,500 on ads last week and brought in $12,000 in new revenue" in one number, on one screen.

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