> ## 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.

# New Customer Units Sold: First-Time Buyer Quantity

> Track product units purchased by first-time customers. Measure acquisition basket size and compare to returning customers for retention insights.

<Tip>
  Total product units purchased by new customers in first-time orders.
</Tip>

## Formula

<Info>
  **New Customer Units Sold** = **SUM** ( Units ) **WHERE** [customer\_type = new\_customer](/data-dictionary/measures-and-dimensions#visitor-dimensions)
</Info>

### Formula Components

| Metric                                                                                            | Definition                               |
| ------------------------------------------------------------------------------------------------- | ---------------------------------------- |
| **Units**                                                                                         | Product quantity from order line items   |
| [**customer\_type = new\_customer**](/data-dictionary/measures-and-dimensions#visitor-dimensions) | Filters to orders from first-time buyers |

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

***

## Example

Your store sold **2,847 units** to new customers this month:

| Week   | NC Units | NC Orders | Units/Order |
| ------ | -------- | --------- | ----------- |
| Week 1 | 712      | 285       | 2.5         |
| Week 2 | 698      | 310       | 2.3         |
| Week 3 | 745      | 298       | 2.5         |
| Week 4 | 692      | 277       | 2.5         |

***

## How It Works

New Customer Units Sold sums the quantity of all line items from orders placed by first-time customers. A customer is classified as "new" if the order is their first recorded purchase in Shopify. This metric helps you understand how many products new customers buy in their initial transaction.

***

## When to Use

| Scenario                          | Action                                                             |
| --------------------------------- | ------------------------------------------------------------------ |
| Measuring acquisition basket size | Compare units per order for new vs returning customers             |
| Evaluating bundle promotions      | Track if first-time buyers purchase more units after bundle launch |
| Inventory planning                | Forecast demand from new customer acquisition campaigns            |
| Retention analysis                | Benchmark against returning customer units to measure loyalty      |

***

## Related Metrics

| Metric                                                                                          | Relationship                                      |
| ----------------------------------------------------------------------------------------------- | ------------------------------------------------- |
| [Units Sold](/reference/metrics/orders/counts/units-sold)                                       | Total units across all customers                  |
| [Returning Customer Units Sold](/reference/metrics/orders/counts/returning-customer-units-sold) | Units from repeat buyers (compare to this metric) |
| [New Customer Units Per Order](/reference/metrics/orders/counts/new-customer-units-per-order)   | This metric ÷ New Customer Orders                 |
| [New Customers](/reference/metrics/orders/customers/new-customers)                              | Count of first-time buyers                        |

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