> ## 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.

# Units Per Order: Average Basket Quantity

> Track the average number of product units per order to measure basket size. Optimize bundling, cross-sells, and product mix to increase order volume.

<Tip>
  The average number of product units included in each order.
</Tip>

## Formula

<Info>
  **Units Per Order** = [**Units Sold**](/reference/metrics/orders/counts/units-sold) ÷ [**Orders**](/reference/metrics/orders/counts/orders)
</Info>

### Formula Components

| Metric                                                        | Definition                                    |
| ------------------------------------------------------------- | --------------------------------------------- |
| [**Units Sold**](/reference/metrics/orders/counts/units-sold) | Total product quantity sold across all orders |
| [**Orders**](/reference/metrics/orders/counts/orders)         | Total number of completed orders              |

| Metadata        |                             |
| --------------- | --------------------------- |
| **Type**        | Number                      |
| **Data Source** | [Shopify](/sources/shopify) |
| **Aggregation** | Ratio                       |

***

## Example

Your store averaged **3.0 units per order** in March with 2,914 orders:

| Week   | Orders | Units Sold | Units/Order |
| ------ | ------ | ---------- | ----------- |
| Week 1 | 687    | 1,923      | 2.8         |
| Week 2 | 712    | 2,279      | 3.2         |
| Week 3 | 745    | 2,384      | 3.2         |
| Week 4 | 770    | 2,156      | 2.8         |

***

## How It Works

Units Per Order divides total units sold by total orders. Higher values indicate customers are adding more items per transaction—either through bundles, cross-sells, or natural multi-item purchases.

***

## When to Use

| Scenario              | Action                                                               |
| --------------------- | -------------------------------------------------------------------- |
| Low units per order   | Test product bundles or "frequently bought together" recommendations |
| Declining trend       | Review cross-sell placements, shipping thresholds, or product mix    |
| Comparing segments    | Analyze new vs. returning customer basket sizes                      |
| Evaluating promotions | Measure impact of volume discounts or bundle offers                  |

***

## Related Metrics

| Metric                                                                              | Relationship                             |
| ----------------------------------------------------------------------------------- | ---------------------------------------- |
| [Units Sold](/reference/metrics/orders/counts/units-sold)                           | Numerator: total product quantity        |
| [Orders](/reference/metrics/orders/counts/orders)                                   | Denominator: transaction count           |
| [NC Units Per Order](/reference/metrics/orders/counts/new-customer-units-per-order) | Same formula for new customers only      |
| [Total AOV](/reference/metrics/orders/aov/total-aov)                                | Revenue version—measures value per order |

[See all Order Counts metrics →](/reference/metrics/orders/counts)