> ## 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 CPM: Cost Per 1,000 Impressions Across Channels

> Track your cost per 1,000 ad impressions across Meta, Google, and TikTok. Learn the formula, see examples, and optimize your reach efficiency.

<Tip>
  How much you pay for every 1,000 times your ads are shown across all channels.
</Tip>

## Formula

<Info>
  **Blended CPM** = ( **Blended Spend** ÷ **Blended Impressions** ) × 1,000
</Info>

### Formula Components

| Metric                                                                                                 | Definition                                                    |
| ------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------- |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)                | Total amount spent on advertising across all platforms        |
| [**Blended Impressions**](/reference/metrics/advertising/blended/blended-audience/blended-impressions) | Total number of times ads were displayed 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 spent **\$15,000** and generated **3,000,000 impressions** this month:

| Channel     | Spend        | Impressions   | CPM        |
| ----------- | ------------ | ------------- | ---------- |
| Meta Ads    | \$8,000      | 1,600,000     | \$5.00     |
| Google Ads  | \$5,000      | 1,000,000     | \$5.00     |
| TikTok Ads  | \$2,000      | 400,000       | \$5.00     |
| **Blended** | **\$15,000** | **3,000,000** | **\$5.00** |

***

## How It Works

Blended CPM aggregates your total ad spend and impressions across all connected advertising platforms, then calculates the cost per 1,000 impressions. This gives you a single efficiency metric for your entire paid media program regardless of channel mix.

***

## When to Use

| Scenario                   | Action                                                     |
| -------------------------- | ---------------------------------------------------------- |
| Comparing reach efficiency | Benchmark your blended CPM against industry averages       |
| Budget planning            | Estimate required budget based on target impression volume |
| Channel mix optimization   | Compare blended CPM to individual platform CPMs            |
| Seasonal analysis          | Track how CPM fluctuates during peak advertising periods   |

***

## Related Metrics

| Metric                                                                                             | Relationship                                              |
| -------------------------------------------------------------------------------------------------- | --------------------------------------------------------- |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                | The numerator in CPM calculation                          |
| [Blended Impressions](/reference/metrics/advertising/blended/blended-audience/blended-impressions) | The denominator in CPM calculation                        |
| [Blended CPC](/reference/metrics/advertising/blended/blended-clicks/blended-cpc)                   | Cost efficiency measured by clicks instead of impressions |

[See all Blended Audience metrics →](/reference/metrics/advertising/blended/blended-audience)