> ## 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.

# Cost per Order Placed: Measure Acquisition Efficiency

> Track cost per order placed for your Shopify store. Calculate average advertising spend required to generate each order placement event and optimize acquisition.

<Tip>
  Cost per Order Placed measures the average advertising spend required to generate one order placement event tracked by the Upstack pixel.
</Tip>

## Formula

<Info>
  **Cost per Order Placed** = **Channel Spend** ÷ **Order Placed Events**
</Info>

### Formula Components

| Metric                  | Definition                                                |
| ----------------------- | --------------------------------------------------------- |
| **Channel Spend**       | Total advertising spend across all connected ad platforms |
| **Order Placed Events** | Order placement events tracked by the Upstack pixel       |

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

***

## Example

Your Shopify store spent **\$12,000 on ads** in February and the Upstack pixel tracked **400 order placed events**.

| Week      | Ad Spend     | Order Placed | Cost/Order Placed |
| --------- | ------------ | ------------ | ----------------- |
| Week 1    | \$2,800      | 88           | \$31.82           |
| Week 2    | \$3,200      | 105          | \$30.48           |
| Week 3    | \$3,000      | 98           | \$30.61           |
| Week 4    | \$3,000      | 109          | \$27.52           |
| **Total** | **\$12,000** | **400**      | **\$30.00**       |

***

## How It Works

Upstack calculates Cost per Order Placed by dividing your total advertising spend across all channels by the number of order placed events tracked by the pixel. This metric spans Meta, Google, TikTok, and any other connected ad platforms—showing how much you spend on average to generate each Shopify order placement.

***

## When to Use

| Scenario                          | Action                                                    |
| --------------------------------- | --------------------------------------------------------- |
| Evaluating acquisition efficiency | Compare against target CPA to assess campaign health      |
| Budget allocation                 | Shift spend toward channels with lower cost per order     |
| Forecasting order volume          | Project total ad spend needed to hit order targets        |
| Channel benchmarking              | Identify which platforms generate orders most efficiently |

***

## Related Metrics

| Metric                                                                                   | Relationship                                  |
| ---------------------------------------------------------------------------------------- | --------------------------------------------- |
| [Cost per Purchase](/reference/metrics/funnel/conversions/cost-per-purchase)             | Similar efficiency metric for purchase events |
| [Purchases](/reference/metrics/funnel/conversions/purchases)                             | Count of purchase events tracked              |
| [Session Conversion Rate](/reference/metrics/funnel/conversions/session-conversion-rate) | Percentage of sessions that convert           |

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