> ## 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 Shipped: Track Fulfillment Acquisition Costs

> Track cost per order shipped for your Shopify store. Calculate average ad spend required to generate each fulfilled order shipment event.

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

## Formula

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

### Formula Components

| Metric                   | Definition                                                                        |
| ------------------------ | --------------------------------------------------------------------------------- |
| **Channel Spend**        | Total advertising spend across all connected ad platforms                         |
| **Order Shipped Events** | Order shipment events tracked by the Upstack pixel when Shopify fulfills an order |

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

***

## Example

Your Shopify store spent **\$15,000 on ads** in March and the Upstack pixel tracked **450 order shipped events**.

| Week      | Ad Spend     | Orders Shipped | Cost/Order Shipped |
| --------- | ------------ | -------------- | ------------------ |
| Week 1    | \$3,500      | 102            | \$34.31            |
| Week 2    | \$3,800      | 118            | \$32.20            |
| Week 3    | \$3,700      | 115            | \$32.17            |
| Week 4    | \$4,000      | 115            | \$34.78            |
| **Total** | **\$15,000** | **450**        | **\$33.33**        |

***

## How It Works

Upstack calculates Cost per Order Shipped by dividing your total advertising spend across all channels by the number of order shipped events tracked by the pixel. This metric reflects the true cost to acquire a fulfilled order—not just a placed order—giving you a more accurate picture of acquisition efficiency for orders that actually shipped from your Shopify store.

***

## When to Use

| Scenario                          | Action                                                             |
| --------------------------------- | ------------------------------------------------------------------ |
| Measuring true acquisition cost   | Use instead of Cost per Purchase to account for cancelled orders   |
| Evaluating fulfillment efficiency | Compare against Cost per Order Placed to identify fulfillment gaps |
| Budget planning                   | Forecast ad spend needed to ship target number of orders           |
| Channel performance               | Identify which platforms drive fulfilled orders most efficiently   |

***

## Related Metrics

| Metric                                                                               | Relationship                              |
| ------------------------------------------------------------------------------------ | ----------------------------------------- |
| [Order Shipped Value](/reference/metrics/funnel/conversions/order-shipped-value)     | Total value of orders shipped             |
| [Cost per Order Placed](/reference/metrics/funnel/conversions/cost-per-order-placed) | Similar metric for order placement events |
| [Cost per Purchase](/reference/metrics/funnel/conversions/cost-per-purchase)         | Cost efficiency for purchase events       |

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