> ## 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.

# Webinar Registered Cost: Ad Spend per Registration

> Calculate advertising cost per webinar registration. Measure webinar promotion efficiency.

<Tip>
  Webinar Registered Cost measures how much you spend on advertising for each webinar registration.
</Tip>

## Formula

<Info>
  **Webinar Registered Cost** = **Ad Spend** ÷ **Webinar Registered**
</Info>

### Formula Components

| Metric                                                                             | Definition                                         |
| ---------------------------------------------------------------------------------- | -------------------------------------------------- |
| [**Ad Spend**](/reference/metrics/advertising/blended/blended-spend)               | Total advertising cost from connected ad platforms |
| [**Webinar Registered**](/reference/metrics/funnel/conversions/webinar-registered) | Count of webinar registrations                     |

| Metadata        |                         |
| --------------- | ----------------------- |
| **Type**        | Currency                |
| **Data Source** | [Upstack Pixel](/pixel) |
| **Aggregation** | Ratio                   |

***

## Example

You spent **\$2,000** on webinar promotion in January and drove **138 registrations**.

| Metric                  | Value   | Notes                  |
| ----------------------- | ------- | ---------------------- |
| Ad Spend                | \$2,000 | Webinar promotion cost |
| Webinar Registered      | 138     | Registrations          |
| Webinar Registered Cost | \$14.49 | Cost per registration  |

***

## How It Works

This metric divides your total ad spend by the number of webinar registrations. It measures the cost efficiency of webinar-based lead generation.

***

## When to Use

| Scenario            | Action                                      |
| ------------------- | ------------------------------------------- |
| Webinar ROI         | Measure return on webinar promotion         |
| Channel comparison  | Compare registration costs across platforms |
| Budget optimization | Allocate spend for webinar campaigns        |
| Topic analysis      | Compare cost across webinar topics          |

***

## Related Metrics

| Metric                                                                                     | Relationship                        |
| ------------------------------------------------------------------------------------------ | ----------------------------------- |
| [Webinar Registered](/reference/metrics/funnel/conversions/webinar-registered)             | The denominator in this calculation |
| [Webinar Registered Value](/reference/metrics/funnel/conversions/webinar-registered-value) | Value of registrations              |
| [Content Downloaded Cost](/reference/metrics/funnel/conversions/content-downloaded-cost)   | Compare content CPL                 |

[See all Conversions metrics →](/reference/metrics/funnel/conversions)