> ## 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.

# Initiate Checkout to Purchase Rate: Measure Checkout Completion

> Track checkout to purchase rate for your Shopify store. Measure what percentage of checkout initiations convert to completed purchases.

<Tip>
  Initiate Checkout to Purchase Rate measures the percentage of checkout initiations that completed as purchases. Low rates can indicate checkout friction or payment issues.
</Tip>

## Formula

<Info>
  **Initiate Checkout to Purchase Rate** = **Purchases** ÷ **Initiate Checkouts** × 100
</Info>

### Formula Components

| Metric                                                                            | Definition                                                    |
| --------------------------------------------------------------------------------- | ------------------------------------------------------------- |
| [**Purchases**](/reference/metrics/funnel/conversions/purchases)                  | Total completed purchase events tracked by the Upstack pixel  |
| [**Initiate Checkouts**](/reference/metrics/funnel/engagement/initiate-checkouts) | Total checkout initiation events tracked by the Upstack pixel |

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

***

## Example

Your Shopify store recorded **2,450 checkout initiations** and **1,838 completed purchases** in January.

| Metric              | Value  |
| ------------------- | ------ |
| Initiate Checkouts  | 2,450  |
| Purchases           | 1,838  |
| IC to Purchase Rate | 75.02% |

***

## How It Works

The Upstack pixel tracks each checkout initiation and purchase event. The rate is calculated by dividing the number of completed purchases by the total number of checkout initiations, then multiplying by 100 to express as a percentage.

***

## When to Use

| Scenario                       | Action                                                            |
| ------------------------------ | ----------------------------------------------------------------- |
| Checkout abandonment is high   | Optimize checkout flow, reduce form fields, or add trust signals  |
| Comparing acquisition channels | Identify which traffic sources have highest checkout completion   |
| Testing checkout changes       | Measure impact of payment options, shipping costs, or UI updates  |
| Diagnosing revenue drops       | Determine if issue is at checkout conversion vs earlier in funnel |

***

## Related Metrics

| Metric                                                                                   | Relationship                          |
| ---------------------------------------------------------------------------------------- | ------------------------------------- |
| [Initiate Checkouts](/reference/metrics/funnel/engagement/initiate-checkouts)            | Denominator — total checkouts started |
| [Purchases](/reference/metrics/funnel/conversions/purchases)                             | Numerator — completed transactions    |
| [Session Conversion Rate](/reference/metrics/funnel/conversions/session-conversion-rate) | Overall session-level conversion rate |

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