> ## 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 Add to Wishlist: Cross-Platform Wishlist Efficiency

> Track your blended cost per wishlist addition across Meta, Google, and TikTok ads. Measure cross-platform efficiency for wishlist actions.

<Tip>
  Blended Cost per Add to Wishlist measures how much you spend on average across all ad platforms to generate one add-to-wishlist event.
</Tip>

## Formula

<Info>
  **Blended Cost per Add to Wishlist** = [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend) ÷ [**Blended Add to Wishlists**](/reference/metrics/advertising/blended/add-to-wishlists/blended-add-to-wishlists)
</Info>

### Formula Components

| Metric                                                                                                           | Definition                                                |
| ---------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------- |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend)                                        | Total advertising spend across all connected ad platforms |
| [**Blended Add to Wishlists**](/reference/metrics/advertising/blended/add-to-wishlists/blended-add-to-wishlists) | Total wishlist events attributed across all ad platforms  |

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

***

## Example

Your fashion brand spent **\$12,000** across all ad platforms last month and generated **2,400** wishlist additions.

| Metric                               | Value      |
| ------------------------------------ | ---------- |
| Blended Spend                        | \$12,000   |
| Blended Add to Wishlists             | 2,400      |
| **Blended Cost per Add to Wishlist** | **\$5.00** |

***

## How It Works

Blended Cost per Add to Wishlist divides your total advertising spend across Meta, Google, and TikTok by the total add-to-wishlist events attributed to those platforms. This gives you a unified view of how efficiently your combined ad spend drives consideration-stage actions, regardless of which platform generated them.

***

## When to Use

| Scenario                    | Action                                                                                        |
| --------------------------- | --------------------------------------------------------------------------------------------- |
| Budget allocation           | Compare blended cost per wishlist against platform-specific costs to identify efficiency gaps |
| Funnel optimization         | Track how cost per wishlist changes relative to cost per add-to-cart                          |
| Campaign scaling            | Monitor if increased spend maintains efficient cost per wishlist action                       |
| Cross-platform benchmarking | Evaluate overall ad efficiency for mid-funnel engagement without platform bias                |

***

## Related Metrics

| Metric                                                                                                       | Relationship                                                    |
| ------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------- |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend)                                        | Numerator — total ad spend across platforms                     |
| [Blended Add to Wishlists](/reference/metrics/advertising/blended/add-to-wishlists/blended-add-to-wishlists) | Denominator — total wishlist events across platforms            |
| [Blended CPA](/reference/metrics/advertising/blended/blended-cost-per-acquisition)                           | Cost per acquisition — measures cost to drive final conversions |

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