Blended Cost per Add to Cart measures how much you spend across all ad platforms to generate one add-to-cart event.
| Metric | Definition |
|---|
| Blended Spend | Total advertising spend across all connected ad platforms |
| Blended Add to Carts | Total add-to-cart events attributed across all ad platforms |
| Metadata | |
|---|
| Type | Currency |
| Data Source | Meta Ads, Google Ads, TikTok Ads |
| Aggregation | Ratio |
Example
Your store spent $15,000 across all ad platforms last month and generated 3,000 add-to-cart events.
| Metric | Value |
|---|
| Blended Spend | $15,000 |
| Blended Add to Carts | 3,000 |
| Blended Cost per Add to Cart | $5.00 |
How It Works
Blended Cost per Add to Cart divides your total advertising spend across Meta, Google, and TikTok by the total add-to-cart events attributed to those platforms. This gives you a unified view of how efficiently your combined ad spend drives cart actions, regardless of which platform generated them.
When to Use
| Scenario | Action |
|---|
| Budget allocation | Compare blended cost per ATC against platform-specific costs to identify efficiency gaps |
| Funnel optimization | Track how cost per cart action changes relative to cost per purchase |
| Campaign scaling | Monitor if increased spend maintains efficient cost per cart action |
| Cross-platform benchmarking | Evaluate overall ad efficiency without platform-specific bias |
| Metric | Relationship |
|---|
| Blended Spend | Numerator — total ad spend across platforms |
| Blended Add to Carts | Denominator — total cart events across platforms |
| Blended Cost per Purchase | Downstream efficiency — cost to convert cart to purchase |
| Blended ROAS | Revenue efficiency — return on combined ad spend |
