> ## 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 Unique Click: Cost Per Unique Ad Clicker

> Track the cost per unique person who clicked your ads across Meta, Google, and TikTok. Optimize spend efficiency by measuring deduplicated click costs.

<Tip>
  Blended Cost Per Unique Click measures how much you pay to acquire each distinct person who clicks your ads across all advertising platforms.
</Tip>

## Formula

<Info>
  **Blended Cost Per Unique Click** = **Blended Spend** ÷ **Blended Unique Clicks**
</Info>

### Formula Components

| Metric                                                                                                   | Definition                                                         |
| -------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------ |
| [**Blended Spend**](/reference/metrics/advertising/blended/blended-spend/blended-spend)                  | Combined ad spend across all connected advertising platforms       |
| [**Blended Unique Clicks**](/reference/metrics/advertising/blended/blended-clicks/blended-unique-clicks) | Distinct people who clicked ads at least once 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 brand spent **\$8,400** in March and acquired **8,420 unique clickers**:

| Metric                            | Value      |
| --------------------------------- | ---------- |
| Blended Spend                     | \$8,400    |
| Unique Clickers                   | 8,420      |
| **Blended Cost Per Unique Click** | **\$1.00** |

***

## How It Works

Blended Cost Per Unique Click divides total spend by unique clickers across all connected platforms. Unlike standard CPC, this metric counts each person only once—showing true cost to reach new engaged users.

***

## When to Use

| Scenario                         | Action                                                             |
| -------------------------------- | ------------------------------------------------------------------ |
| Measuring acquisition efficiency | Compare cost per unique clicker vs standard CPC                    |
| Detecting click fraud            | High CPC but low cost/unique click may indicate bot clicks         |
| Optimizing for reach             | Prioritize platforms with lower cost per unique click              |
| Cross-platform budgeting         | Identify which platforms deliver unique audiences cost-effectively |

***

## Related Metrics

| Metric                                                                                               | Relationship                              |
| ---------------------------------------------------------------------------------------------------- | ----------------------------------------- |
| [Blended Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend)                  | Numerator — total cost across platforms   |
| [Blended Unique Clicks](/reference/metrics/advertising/blended/blended-clicks/blended-unique-clicks) | Denominator — distinct clickers           |
| [Blended CPC](/reference/metrics/advertising/blended/blended-clicks/blended-cpc)                     | Total click cost (includes repeat clicks) |

[See all Blended Clicks metrics →](/reference/metrics/advertising/blended/blended-clicks)