> ## 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 Conversion: Acquisition Cost Across Channels

> Track your cost per conversion across all advertising channels. Measure how much you spend on average for each conversion event attributed to your ads.

<Tip>
  Blended Cost per Conversion measures the average cost for each conversion event attributed to your advertising across all connected platforms.
</Tip>

## Formula

<Info>
  **Blended Cost per Conversion** = **Blended Spend** ÷ **Blended Conversions**
</Info>

### Formula Components

| Metric                                                                                                    | Definition                                             |
| --------------------------------------------------------------------------------------------------------- | ------------------------------------------------------ |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)                   | Total advertising spend across all connected platforms |
| [**Blended Conversions**](/reference/metrics/advertising/blended/blended-conversions/blended-conversions) | Total conversion events attributed across all channels |

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

***

## Example

Your store spent **\$18,000** across all advertising channels in April and generated **1,200 total conversions** (including purchases, leads, and registrations).

| Channel     | Spend        | Conversions | Cost/Conversion |
| ----------- | ------------ | ----------- | --------------- |
| Meta        | \$9,000      | 650         | \$13.85         |
| Google      | \$6,000      | 380         | \$15.79         |
| TikTok      | \$3,000      | 170         | \$17.65         |
| **Blended** | **\$18,000** | **1,200**   | **\$15.00**     |

***

## How It Works

Blended Cost per Conversion aggregates total ad spend and total conversion events from Meta, Google, and TikTok, then calculates the average cost per conversion. Unlike CPA which focuses specifically on purchase conversions, this metric includes all conversion types—purchases, leads, registrations, app installs, and other configured goals.

***

## When to Use

| Scenario                                    | Action                                                |
| ------------------------------------------- | ----------------------------------------------------- |
| Measuring overall ad efficiency             | Track cost to drive any conversion action             |
| Comparing conversion costs across platforms | Identify which channels convert most efficiently      |
| Budget allocation decisions                 | Shift spend toward lower cost-per-conversion channels |
| Multi-goal campaign optimization            | Evaluate campaigns driving various conversion types   |

***

## Related Metrics

| Metric                                                                                                | Relationship                                  |
| ----------------------------------------------------------------------------------------------------- | --------------------------------------------- |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                   | Numerator — total ad spend across platforms   |
| [Blended Conversions](/reference/metrics/advertising/blended/blended-conversions/blended-conversions) | Denominator — total conversion events         |
| [Blended CPA](/reference/metrics/advertising/blended/blended-efficiency/blended-cpa)                  | Purchase-specific version (Spend ÷ Purchases) |

[See all Blended Conversions metrics →](/reference/metrics/advertising/blended/blended-conversions)