> ## 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 Purchases: Cross-Channel Conversion Tracking

> Track purchase conversions attributed to your advertising across all channels. Measure total cross-platform conversion volume.

<Tip>
  Blended Purchases measures the total number of purchase conversions attributed to your advertising across all connected ad platforms.
</Tip>

## Formula

<Info>
  **Blended Purchases** = **SUM** ( Attributed Purchases ) **ACROSS** All Channels
</Info>

### Formula Components

| Metric                                                                                            | Definition                                    |
| ------------------------------------------------------------------------------------------------- | --------------------------------------------- |
| [**Meta Purchases**](/reference/metrics/advertising/meta/meta-conversions/meta-purchases)         | Purchase conversions attributed to Meta ads   |
| [**Google Purchases**](/reference/metrics/advertising/google/google-conversions/google-purchases) | Purchase conversions attributed to Google ads |
| [**TikTok Purchases**](/reference/metrics/advertising/tiktok/tiktok-conversions/tiktok-purchases) | Purchase conversions attributed to TikTok ads |

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

***

## Example

**Your ad campaigns drove 847 purchases across all platforms in March:**

| Platform          | Purchases | % of Total |
| ----------------- | --------- | ---------- |
| Meta Ads          | 512       | 60%        |
| Google Ads        | 268       | 32%        |
| TikTok Ads        | 67        | 8%         |
| **Blended Total** | **847**   | 100%       |

***

## How It Works

Blended Purchases aggregates purchase conversions attributed to your advertising across Meta, Google, and TikTok. Each platform reports conversions based on its own attribution model and window, then these values are summed to provide a unified cross-channel view of ad-driven conversions.

***

## When to Use

| Scenario                              | Action                                             |
| ------------------------------------- | -------------------------------------------------- |
| Measuring total ad-driven conversions | Track overall advertising effectiveness            |
| Comparing cross-platform performance  | Identify which platforms drive more purchases      |
| Calculating blended CPA or ROAS       | Use as the conversion count for efficiency metrics |
| Budget allocation decisions           | Allocate spend toward higher-converting platforms  |

***

## Related Metrics

| Metric                                                                                                        | Relationship                               |
| ------------------------------------------------------------------------------------------------------------- | ------------------------------------------ |
| [Blended Purchases Value](/reference/metrics/advertising/blended/blended-conversions/blended-purchases-value) | Revenue from these purchases               |
| [Blended CPA](/reference/metrics/advertising/blended/blended-efficiency/blended-cpa)                          | Cost per purchase (Spend ÷ Purchases)      |
| [Blended ROAS](/reference/metrics/advertising/blended/blended-efficiency/blended-roas)                        | Return on ad spend using these conversions |

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