Metrics

Blended ROAS

Total revenue divided by total ad spend across all channels, providing an overall view of advertising efficiency.

Blended ROAS calculates overall advertising efficiency by dividing total revenue by total ad spend across all channels. For example, if you spend €100,000 across Meta, Google, and TikTok and generate €400,000 in revenue, your blended ROAS is 4x. Blended ROAS is useful for understanding overall marketing efficiency and setting budget targets, but it has limitations. It doesn't account for organic traffic, direct traffic, or non-advertising marketing efforts. It also doesn't show which channels are performing well versus poorly—a 4x blended ROAS might hide a 2x Meta ROAS and a 6x Google ROAS. For channel-specific optimization, you need platform-specific ROAS. However, due to attribution overlap (multiple platforms claiming credit for the same conversion), platform ROAS numbers often don't add up to blended ROAS. This is why reconciliation and incrementality testing are essential for accurate performance measurement.

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Frequently Asked Questions

What is blended ROAS?

Blended ROAS is total revenue divided by total ad spend across all platforms, calculated from your e-commerce platform (like Shopify) as the source of truth. It's similar to MER but specifically refers to paid advertising performance, excluding organic channels.

Why is blended ROAS lower than platform-reported ROAS?

Blended ROAS is lower than platform-reported ROAS because platforms over-claim conversions due to attribution overlap. If Meta reports 100 conversions and Google reports 80 conversions, but Shopify only shows 120 actual orders, there's 60 conversions of overlap. Blended ROAS accounts for this reality.

Should I use blended ROAS or platform ROAS?

Use blended ROAS for budget decisions and profitability analysis, since it reflects actual revenue. Use platform-reported ROAS for campaign optimization within each platform. Track both metrics to understand the gap between reported and actual performance.

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