> ## 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 Like: Engagement Efficiency

> Track cost per like across all ad platforms. Compare engagement efficiency and optimize your social ad spend for better results.

<Tip>
  Blended Cost Per Like measures how much you pay for each like across all your advertising platforms combined.
</Tip>

## Formula

<Info>
  **Blended Cost Per Like** = **Blended Spend** ÷ **Blended Likes**
</Info>

### Formula Components

| Metric                                                                                       | Definition                                     |
| -------------------------------------------------------------------------------------------- | ---------------------------------------------- |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)      | Total ad spend aggregated across all platforms |
| [**Blended Likes**](/reference/metrics/advertising/blended/blended-engagement/blended-likes) | Total likes on ads across all 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 generated **12,500 likes** with **\$2,500 total spend** across Meta, TikTok, and Google—yielding a blended cost per like of **\$0.20**.

***

## How It Works

Blended Cost Per Like aggregates total spend and total likes from Meta, Google, and TikTok, then calculates the combined cost per like. This gives you a single efficiency metric across all platforms rather than evaluating each separately.

***

## When to Use

| Scenario                                       | Action                                      |
| ---------------------------------------------- | ------------------------------------------- |
| Comparing cross-platform engagement efficiency | Use blended CPL as your unified benchmark   |
| Budget allocation decisions                    | Shift spend toward platforms with lower CPL |
| Campaign performance review                    | Track blended CPL trends over time          |
| Setting engagement cost targets                | Establish CPL thresholds for new campaigns  |

***

## Related Metrics

| Metric                                                                                                               | Relationship                         |
| -------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                                  | Numerator in this calculation        |
| [Blended Likes](/reference/metrics/advertising/blended/blended-engagement/blended-likes)                             | Denominator in this calculation      |
| [Blended Cost Per Engagement](/reference/metrics/advertising/blended/blended-engagement/blended-cost-per-engagement) | Broader engagement efficiency metric |

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