> For the complete documentation index, see [llms.txt](https://help.daasity.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.daasity.com/core-concepts/metrics/retail-and-wholesale-metrics/sales-volume/incremental-units.md).

# Incremental Units

**Description:** Additional product units sold due to a promotion above the expected baseline.

**Formula:** *Incremental Units = Actual Promo Units – Baseline Units*

**SQL Calculation:**

```sql
SUM(promo_units) - SUM(baseline_units) AS incremental_units
```

**Why It Matters:** Shows volume lift attributable to promotion.

**Metric Type:** Result

**Essence:** Lagging

**Frequency:** Per Promotion Event / Weekly

**Units:** Units

**Suggested Breakdowns:** Product, Retailer, Market, Promo Type

**Questions Answered:**

* How many extra units did the promotion sell?
* Which promos drive the most physical volume?

**Potential Causes of Worsening:** Shallow discount, poor in-store execution, consumer stockpiling outside promo window.

**Tactics to Improve:**

* Adjust discount laddering
* Bundle products
* Optimize display execution

**Related Metrics:**

* Incremental Dollars
* ROI per Case
* Contribution Margin ROI

**Related Explores:**

* Promotion Lift Explorer

**Related Sources:**

* URMS.SALES\_REPORT