> ## 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.

# Unique Checkouts: Session-Deduplicated Checkout Count

> Track unique checkout events per session. Count session-deduplicated checkout initiations to measure true checkout intent without duplicate events.

<Tip>
  Unique Checkouts counts the number of sessions where at least one checkout event occurred, eliminating duplicate checkout events within the same session.
</Tip>

## Formula

<Info>
  **Unique Checkouts** = **COUNT** ( Distinct Sessions with Checkout Event )
</Info>

### Formula Components

| Metric                                    | Definition                                                                                 |
| ----------------------------------------- | ------------------------------------------------------------------------------------------ |
| **Distinct Sessions with Checkout Event** | Sessions where the visitor initiated checkout at least once, counted only once per session |

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

***

## Example

Your store recorded **2,156 unique checkouts** last week, compared to 3,891 total checkout events:

| Day       | Unique Checkouts | Total Checkout Events | Dedup Ratio |
| --------- | ---------------- | --------------------- | ----------- |
| Monday    | 298              | 512                   | 58%         |
| Tuesday   | 312              | 567                   | 55%         |
| Wednesday | 287              | 498                   | 58%         |
| Thursday  | 324              | 589                   | 55%         |
| Friday    | 356              | 684                   | 52%         |
| Saturday  | 298              | 521                   | 57%         |
| Sunday    | 281              | 520                   | 54%         |

***

## How It Works

When a visitor reaches your checkout page, the Upstack Pixel fires a checkout event. If that same visitor refreshes the page or navigates back and forth multiple times within a session, multiple events fire. Unique Checkouts deduplicates these by counting only one checkout per session, giving you an accurate count of sessions with purchase intent.

***

## When to Use

| Scenario                              | Action                                                                                     |
| ------------------------------------- | ------------------------------------------------------------------------------------------ |
| Measuring true checkout intent        | Use Unique Checkouts instead of raw checkout events to avoid inflation from page refreshes |
| Calculating accurate conversion rates | Divide purchases by Unique Checkouts for checkout-to-purchase rate                         |
| Identifying checkout friction         | Compare Unique Checkouts to Purchases to find drop-off at payment                          |
| Evaluating campaign quality           | Sessions reaching checkout indicate stronger purchase intent                               |

***

## Related Metrics

| Metric                                                                                       | Relationship                                        |
| -------------------------------------------------------------------------------------------- | --------------------------------------------------- |
| [Initiate Checkouts](/reference/metrics/funnel/engagement/initiate-checkouts)                | Raw checkout event count (not session-deduplicated) |
| [Purchases](/reference/metrics/funnel/conversions/purchases)                                 | Completed conversions from checkout                 |
| [Checkout to Purchase Rate](/reference/metrics/funnel/conversions/checkout-to-purchase-rate) | Measures conversion from checkout to purchase       |

[See all Attributed Conversions metrics →](/reference/metrics/funnel/conversions)