> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upstackdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Blended Cost Per Engagement: Aggregate CPE Across Platforms

> Track cost per social engagement across Meta, Google, and TikTok combined. Learn the formula, see examples, and benchmark engagement efficiency.

<Tip>
  The cost per social engagement on your ads, aggregated across all advertising platforms.
</Tip>

## Formula

<Info>
  **Blended Cost Per Engagement** = **Blended Spend** ÷ **Blended Engagements**
</Info>

### Formula Components

| Metric                                                                                                   | Definition                                |
| -------------------------------------------------------------------------------------------------------- | ----------------------------------------- |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)                  | Total ad spend across all platforms       |
| [**Blended Engagements**](/reference/metrics/advertising/blended/blended-engagement/blended-engagements) | Total social engagements across platforms |

| Metadata        |                                                                                                     |
| --------------- | --------------------------------------------------------------------------------------------------- |
| **Type**        | Currency                                                                                            |
| **Data Source** | [Meta Ads](/sources/facebook-ads), [Google Ads](/sources/google-ads), [TikTok Ads](/sources/tiktok) |
| **Aggregation** | Ratio                                                                                               |

***

## Example

Your campaigns spent **\$12,000** and generated **8,000 engagements** this month:

| Platform    | Spend        | Engagements | CPE        |
| ----------- | ------------ | ----------- | ---------- |
| Meta Ads    | \$6,500      | 5,200       | \$1.25     |
| Google Ads  | \$3,000      | 1,500       | \$2.00     |
| TikTok Ads  | \$2,500      | 1,300       | \$1.92     |
| **Blended** | **\$12,000** | **8,000**   | **\$1.50** |

***

## How It Works

Blended CPE divides total ad spend by the sum of all social engagements across Meta, Google, and TikTok. Lower CPE indicates more efficient engagement per dollar.

***

## When to Use

| Scenario                        | Action                                              |
| ------------------------------- | --------------------------------------------------- |
| Benchmark engagement efficiency | Compare CPE across platforms and campaigns          |
| Optimize social campaigns       | Shift budget toward platforms with lower CPE        |
| Evaluate creative performance   | Test which creatives drive engagement at lower cost |

***

## Related Metrics

| Metric                                                                                               | Relationship                   |
| ---------------------------------------------------------------------------------------------------- | ------------------------------ |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                  | Numerator in CPE calculation   |
| [Blended Engagements](/reference/metrics/advertising/blended/blended-engagement/blended-engagements) | Denominator in CPE calculation |
| [Blended CPM](/reference/metrics/advertising/blended/blended-audience/blended-cpm)                   | Cost per 1,000 impressions     |

[See all Blended Engagement metrics →](/reference/metrics/advertising/blended/blended-engagement)