> ## 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 the percentage of initiated checkouts that result in a purchase on your Shopify store. Identify checkout friction and payment issues affecting conversions.

<Tip>
  Initiate Checkout to Purchase Rate measures the percentage of checkout initiations that complete as purchases on your Shopify store.
</Tip>

## Formula

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

### Formula Components

| Metric                                                                            | Definition                                                                       |
| --------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- |
| [**Purchases**](/reference/metrics/funnel/conversions/purchases)                  | Total purchase events tracked by the Upstack Pixel from completed Shopify orders |
| [**Initiate Checkouts**](/reference/metrics/funnel/engagement/initiate-checkouts) | Number of times visitors begin the checkout process by loading the checkout page |

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

***

## Example

Your Shopify store had **2,450 checkout initiations** and **1,568 purchases** this month:

| Metric                  | Value     |
| ----------------------- | --------- |
| Initiate Checkouts      | 2,450     |
| Purchases               | 1,568     |
| **IC to Purchase Rate** | **64.0%** |

By channel:

| Channel    | Initiate Checkouts | Purchases | IC to Purchase Rate |
| ---------- | ------------------ | --------- | ------------------- |
| Meta Ads   | 1,200              | 816       | 68.0%               |
| Google Ads | 800                | 488       | 61.0%               |
| Organic    | 450                | 264       | 58.7%               |

***

## How It Works

Upstack tracks checkout initiations when visitors load your Shopify checkout page and purchases when orders complete. The IC to Purchase Rate divides purchases by initiated checkouts, expressed as a percentage. Low rates often indicate checkout friction—payment issues, shipping cost surprises, or lengthy checkout forms.

***

## When to Use

| Scenario                         | Action                                                              |
| -------------------------------- | ------------------------------------------------------------------- |
| Checkout abandonment is high     | Audit payment options, shipping costs, and checkout form fields     |
| Comparing traffic source quality | Identify which channels drive visitors who complete checkout        |
| A/B testing checkout changes     | Measure impact of checkout optimizations on completion rate         |
| Diagnosing conversion drops      | Distinguish between cart-to-checkout vs checkout-to-purchase issues |

***

## Related Metrics

| Metric                                                                                   | Relationship                                     |
| ---------------------------------------------------------------------------------------- | ------------------------------------------------ |
| [Initiate Checkouts](/reference/metrics/funnel/engagement/initiate-checkouts)            | Denominator in this calculation                  |
| [Purchases](/reference/metrics/funnel/conversions/purchases)                             | Numerator in this calculation                    |
| [Session Conversion Rate](/reference/metrics/funnel/conversions/session-conversion-rate) | Measures overall funnel from session to purchase |

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