> ## 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.

# Add to Cart Rate: Measure Shopping Intent

> Track the percentage of product viewers who add items to cart. Analyze shopping intent and optimize product pages to increase add-to-cart conversions.

<Tip>
  Add to Cart Rate measures the percentage of product page views that result in an add-to-cart action.
</Tip>

## Formula

<Info>
  **Add to Cart Rate** = ( **Add to Carts** ÷ **View Contents** ) × 100
</Info>

### Formula Components

| Metric                                                                  | Definition                       |
| ----------------------------------------------------------------------- | -------------------------------- |
| [**Add to Carts**](/reference/metrics/funnel/engagement/add-to-carts)   | Total add-to-cart events tracked |
| [**View Contents**](/reference/metrics/funnel/engagement/view-contents) | Total product detail page views  |

| Metadata        |                         |
| --------------- | ----------------------- |
| **Type**        | Percentage              |
| **Data Source** | [Upstack Pixel](/pixel) |
| **Aggregation** | Ratio                   |

***

## Example

Your product pages received **8,450 view content events** in January, resulting in **1,521 add-to-cart actions**.

| Metric               | Value     | Calculation                |
| -------------------- | --------- | -------------------------- |
| View Contents        | 8,450     | Product page views tracked |
| Add to Carts         | 1,521     | Items added to cart        |
| **Add to Cart Rate** | **18.0%** | (1,521 ÷ 8,450) × 100      |

***

## How It Works

Add to Cart Rate calculates the conversion between product discovery and purchase intent. The Upstack Pixel tracks view content events when visitors land on product pages and add-to-cart events when they click the add-to-cart button.

***

## When to Use

| Scenario                  | Action                                                        |
| ------------------------- | ------------------------------------------------------------- |
| Product page optimization | Compare rates across products to identify high/low performers |
| A/B testing               | Measure impact of price, imagery, or copy changes             |
| Seasonal analysis         | Track intent changes during promotions or holidays            |
| Funnel diagnostics        | Identify drop-off between viewing and carting                 |

***

## Related Metrics

| Metric                                                                        | Relationship                        |
| ----------------------------------------------------------------------------- | ----------------------------------- |
| [Add to Carts](/reference/metrics/funnel/engagement/add-to-carts)             | Numerator — total cart additions    |
| [View Contents](/reference/metrics/funnel/engagement/view-contents)           | Denominator — product page views    |
| [ATC to IC Rate](/reference/metrics/funnel/engagement/atc-to-ic-rate)         | Next funnel step — cart to checkout |
| [Add to Carts Value](/reference/metrics/funnel/engagement/add-to-carts-value) | Monetary value of items added       |

[See all Engagement metrics →](/reference/metrics/funnel/engagement)