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The average number of product units included in each new customer’s order.

Formula

New Customer Units Per Order = New Customer Units Sold ÷ New Customer Orders

Formula Components

MetricDefinition
New Customer Units SoldTotal product units purchased by first-time buyers
New Customer OrdersCount of orders placed by first-time customers
customer_type = new_customerFilter applied to both numerator and denominator
Metadata
TypeNumber
Data SourceShopify
AggregationRatio

Example

Your store’s new customers averaged 2.4 units per order in January:
SegmentUnits/OrderOrdersTotal Units
New Customers2.41,8504,440
Returning Customers3.12,2006,820
All Customers2.84,05011,260

How It Works

This metric divides total units purchased by new customers by the number of first-time orders. It measures initial basket size behavior, helping you understand whether new customers buy single items or multiple products on their first visit.

When to Use

ScenarioAction
Analyzing acquisition qualityCompare new vs. returning to spot basket size gaps
Optimizing product bundlesTrack if bundle promotions increase first-order units
Evaluating channel performanceIdentify which channels bring customers who buy more
Forecasting inventoryProject unit demand from new customer acquisition

MetricRelationship
New Customer Units SoldNumerator: total units from new customers
Units Per OrderOverall average across all customer types
Returning Customer Units Per OrderComparison metric for repeat buyers
New CustomersCount of first-time buyers
See all Order Counts metrics →