Complete Guide to Using Calculated Metrics in Google Analytics 4

Fırat Cetin

Fırat Cetin

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7 Mins

E-commerce AI

E-commerce

For e-commerce and Shopify store owners, Google Analytics 4 (GA4) offers a range of powerful tools—especially calculated metrics—that can take your data analysis to the next level. We’ll walk you through real-world examples, such as calculating average order value or customer acquisition cost, and show you step-by-step how to set them up. The goal? To give you actionable advice that makes your analytics clearer and your marketing more effective—without any unnecessary jargon.

Complete Guide to Using Calculated Metrics in Google Analytics 4

Introduction

In the rapidly evolving world of digital analytics, tracking meaningful data is crucial for making successful marketing decisions. Google Analytics 4 (GA4) offers powerful tools for capturing these insights, with calculated metrics being particularly noteworthy. These metrics allow you to go beyond default tracking by customizing specific KPIs to align with your business goals.

Whether you need a clearer view of customer behavior or deeper insights into performance, mastering GA4’s calculated metrics can significantly enhance your data analysis and optimize your marketing efforts. Let’s dive into it.

What Are Calculated Metrics in GA4?

Calculated metrics in GA4 are custom formulas that you create by combining existing metrics. They offer tailored views aligned with your business objectives. While metrics like total revenue or page views provide a snapshot, they often lack the key insights needed to drive your business.

Calculated metrics are more than just numbers; they are data points that drive strategic decisions. By using calculated metrics, you can focus on the key performance indicators (KPIs) that truly matter, enabling more precise, data-driven decision-making. In other words, these custom formulas transform your raw data into powerful insights, helping you make strategic decisions with greater clarity and confidence.

With calculated metrics, you can delve deeper into user behavior patterns. It helps you better assess your landing pages and find areas for improvement. It also helps you gauge your page's content. You can then use the data to improve user experience and engagement.

Why You Should Implement Calculated Metrics?

Calculated metrics offer several advantages that can significantly elevate your analytics game:

1. Customizable KPIs

Calculated metrics enable you to create KPIs that align with your business's unique needs. Whether you’re tracking metrics like average order value, conversion rates by segment, or custom customer interaction metrics, these formulas provide precise insights tailored to your requirements. The best part is that these formulas can be adjusted at any time, with changes applied retroactively for continuous accuracy.

2. More Granular Insights

Enhanced event tracking in GA4 allows you to delve deeper into your data. Calculated metrics enable you to combine data from various sources, offering insights that go beyond standard reports. This includes detailed information on specific channels, behaviors, or audiences, leading to more informed decision-making.

3. Simplified Reporting

Calculated metrics in Google Analytics 4 (GA4) simplify the analysis of complex data. They automate calculations that would otherwise need to be done manually, streamlining your data extraction process. With GA4's recent improvements in real-time data and reporting, these metrics are updated instantly, providing you with immediate insights as you view your dashboards. This enhances your ability to make data-driven marketing decisions and improves your overall web analytics.

How to Create Calculated Metrics in GA4: A Step-by-Step Guide

Ready to start creating calculated metrics in GA4? Follow these straightforward steps:

1. Access Admin Settings

Log into your GA4 account and navigate to the Admin section at the bottom left corner of the dashboard.

2. Go to Custom Definitions

In the Admin, select Custom Definitions under the Data Display section. Then, choose Calculated Metrics from the third tab.

Google Analytics 4 settings page screenshot showing the 'Custom Definitions' section for creating and managing custom metrics and dimensions.

3. Create a New Metric

Click “Create calculated metric” to start setting up your metric. Name it with precision, such as "Revenue ex. Tax," and provide a brief description. This step ensures that your calculated metrics in GA4 are clearly defined and easily understood, enhancing the accuracy of your data analysis and KPI tracking.

How to create a calculated metric in Google Analytics 4: A screenshot
  showing the

4. Pay Attention to Attributes

There are five attributes for calculated metrics in GA4:

  • Name: This is the name you’ll see on your GA4 reports.
  • API Name: Automatically generated based on the name you provide.
  • Description: While it doesn’t appear in your custom reports, it helps keep a record.
  • Formula: Enter your calculation here using available metrics within curly brackets. Hover over the question mark to view the list of accepted operators for creating your data analysis.
  • Unit of Measurement: Choose from four main types—standard, currency, distance, and time. Select the one that determines how your calculated metrics appear in your reports.

Screenshot of the Google Analytics 4 interface showing the

Creating a new calculated metric in Google Analytics 4. The screenshot shows the form fields for entering the name, API name, description, formula, unit of measurement, and standard for the new metric.

For e-commerce events such as CPA (Cost per acquisition), AOV (Average order value), or any money-related calculation, select “Currency” as the unit of measurement.

Examples of Calculated Metrics in Google Analytics 4

Average Order Value (AOV)

Formula: {Purchase revenue} / {Transactions}

Unit of measurement: Currency

Purpose: Calculate the average spend per transaction, crucial for e-commerce success.

Customer Acquisition Cost (CAC)

Formula: {Ads cost} / {First time purchasers}

Unit of measurement: Currency

Purpose: Calculates the cost of acquiring a new customer. It helps you assess the efficiency of your marketing efforts and determine your customer lifetime value (CLTV).

Average revenue per paying user (ARPPU)

Formula: {Total revenue} / {Total purchasers}

Unit of measurement: Currency

Purpose: Assess the profitability of your marketing efforts by comparing ad revenue generated to users.

Editing a calculated metric in Google Analytics 4. The screenshot shows the form fields for editing the name, API name, description, formula, and unit of measurement for the existing metric.

Cost Per Acquisition (CPA)

Formula: {Ads cost} / {Ecommerce purchases}

Unit of measurement: Currency

Purpose: Determine the cost-effectiveness of acquiring conversions, a vital metric for optimizing marketing campaigns.

Cart to View Rate

Formula: ({Add to carts}/{Item view events})*100

Units of measurement: Standard

Purpose: To identify which products are attracting more interest by looking at the rate at which displayed products are added to the cart. This way, you can decide which product to allocate more budget to.

Editing a calculated metric in Google Analytics 4. The screenshot shows the form fields for editing the name, API name, description, formula, and unit of measurement for the existing metric.

Save & Apply

After setting up your formula, click Save. Your new calculated metric will now be ready to use in your GA4 reports.

How to Use Calculated Metrics In Your Reports?

There are two ways to see your calculated metrics in action.

1. Reports

To view your custom metrics, navigate to the Reports section in the left-hand column of Google Analytics 4. From there, go to Acquisition and then select Traffic Acquisition. To further customize your report, simply click the pencil icon in the top right corner.

Google Analytics 4 report showing traffic acquisition data by session primary channel group. Includes a line chart, table, day filter dropdown, and icons for customization and sharing.

Click metrics and then “Add metric” at the bottom. Click Save after selecting the metrics you want to see.

Google Analytics 4 report showing traffic acquisition data by session primary channel group. Features a line chart, table, day filter dropdown, and a button to add a new metric.

2. Explore

If you want to take a closer look at your data, click on the "Explore" section in the left column to create a blank report.

Google Analytics 4 Explorations page showing the 'Explorations' section with a button to start a new exploration and four templates: Blank, Free form, Funnel exploration, and Path exploration.

Click the + icon next to the "Metrics" section, and select the "Custom" tab. Then, choose the calculated metric you created. This will let you analyze your campaigns in detail. You can then make informed decisions.

Google Analytics 4 Exploration displaying data for a free-form exploration. Includes a table with session source/medium, Cost Per Acquisition, Customer Acquisition Cost, Cart-to-view rate, and Purchase Revenue. Features buttons for filtering data, adding segments, and showing rows.

Let’s delve deeper by examining insights at the source level. Simply right-click on a source (e.g., google/cpc) and select 'Include only this selection

Dropdown menu in Google Analytics 4 with options to 'Include only selection,' 'Exclude selection,' 'Create segment from selection,' and 'View users.'

In the picture below, you see the performance of Google Ads campaigns.

Google Analytics 4 Exploration displaying data for a free form exploration. Includes a table with session source/medium, session campaign ID, Cost Per Acquisition, Customer Acquisition Cost, Cart-to-view rate, and Purchase revenue.

Common Mistakes to Avoid in GA4 Metrics Calculation

While calculated metrics are powerful, they come with challenges. Avoid these common pitfalls:

  • Overcomplicating Formulas: Keep your formulas simple and relevant to avoid confusion.
  • Neglecting Data Quality: Ensure that the data used in your metrics is accurate and reliable.
  • Ignoring Context: Interpret metrics in the context of your overall strategy and goals.

Calculated Metrics Maximize the Impact of Your Data

Custom metrics are more than just a feature—they’re a strategic asset.

By integrating these metrics into your analytics strategy, you unlock a deeper, more actionable understanding of your business performance. Whether you’re optimizing an e-commerce site, managing content marketing, or refining user experience, calculated metrics provide the clarity needed to drive success.

To Wrap It Up

By customizing these metrics to align with your specific goals, you unlock valuable insights that lead to more informed decision-making and greater success. Dive into Google Analytics 4's powerful features and discover how mastering calculated metrics in GA4 can revolutionize your data analysis and marketing analytics strategies. Embrace these advanced analytics techniques to transform your data-driven marketing and improve your web analytics for a more effective approach to KPI tracking and performance metrics.

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