> ## Documentation Index
> Fetch the complete documentation index at: https://docs.uselayers.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Computed attribute recipes

> Built-in Function templates for common computed attributes, including discounts, variant counts, margins, and catalog health checks.

Recipes are built-in Function templates you can apply from the Function editor. Use them when you want a reliable starting point for a common computed attribute.

To use a recipe, create a **Computed Attribute**, open **Templates**, choose the recipe, preview it on a product, and save.

<AccordionGroup>
  <Accordion title="Discount Percentage">
    **Description:** The percentage discount calculated from compare-at price to current price. Returns 0 if no discount is available.

    **Use case:** Sort products by discount amount or filter for products on sale. Create "Biggest Discounts" collections or exclude heavily discounted items from premium merchandising.

    **Input used:** Price range.

    **Output:** Number.

    **Example:** A product with a compare-at price of $100 and current price of $75 has a discount percentage of 25.
  </Accordion>

  <Accordion title="Variant Count">
    **Description:** The total number of variants for this product. Useful for filtering or sorting by product complexity.

    **Use case:** Identify products with many options (high variant count) or single-variant products. Filter out products with too many variants from certain collections.

    **Input used:** Variants.

    **Output:** Number.

    **Example:** A t-shirt available in 5 colors and 4 sizes (20 combinations) has a variant count of 20.
  </Accordion>

  <Accordion title="Average Margin">
    **Description:** Average profit margin across variants, calculated as (price - cost) / price for each variant with cost data. Excluded from the product if no variants have cost information (the formula evaluates to null).

    **Use case:** Sort products by profitability or filter for high-margin items. Create "Best Margin" collections for merchandising or exclude low-margin products from promotional campaigns.

    **Input used:** Variant price and cost.

    **Output:** Number.

    **Example:** A product with two variants (price=$10, cost=$5 and price=$20, cost=$10) has an average margin of 0.5 (50%).
  </Accordion>

  <Accordion title="SKU Coverage">
    **Description:** Ratio between available variants and total variants. Returns null when a product has no variants.

    **Use case:** Identify products that are partially unavailable or need catalog cleanup.

    **Input used:** Variant availability.

    **Output:** Number.

    **Example:** A product with 3 available variants out of 4 total variants has SKU coverage of 0.75.
  </Accordion>

  <Accordion title="Days Available">
    **Description:** The number of days since the product became available, based on the product published date.

    **Use case:** Build "new arrivals" rules, identify aging products, or sort by freshness.

    **Input used:** Published date.

    **Output:** Number.

    **Example:** A product published on 2026-04-01 returns 40 on 2026-05-11.
  </Accordion>

  <Accordion title="Age of Newest Variant">
    **Description:** The number of days since the newest variant was created.

    **Use case:** Identify products with recently added variants or updated options.

    **Input used:** Variant creation dates.

    **Output:** Number.

    **Example:** If the newest variant was created on 2026-05-01, the value is 10 on 2026-05-11.
  </Accordion>
</AccordionGroup>

## Troubleshooting

### The template result looks empty

Preview the Function and check **Received data**. If the product does not have the data the recipe needs, such as variant cost or compare-at price, the recipe may return 0 or null.

### The recipe is not available as a storefront filter

Confirm the attribute is marked as filterable and that **Enable as Storefront Facet** is turned on. For multi-field outputs, configure the generated sub-field instead of the parent attribute.

## See also

* [Computed attributes](/platform/attributes/calculated-attributes)
* [Functions](/platform/attributes/functions)
* [Catalog Attributes](/platform/attributes)