Ecommerce metrics and KPIs: 19 examples to track

What are ecommerce metrics and KPIs?

Ecommerce metrics and KPIs are quantifiable measurements used to assess the performance and success of an online store. They help you monitor operations, spot what's working, and make confident decisions about where to focus next.

The difference between a metric and a KPI matters. A metric is any number you can track: sessions, orders, returns. A KPI is a metric tied to a specific strategic goal with a target and a timeframe. Conversion Rate is a metric. "Increase Conversion Rate from 2.1% to 3.0% by Q3" is a KPI.

Common ecommerce KPIs include Conversion Rate, Average Order Value, Customer Lifetime Value, and Cart Abandonment Rate. Tracking these numbers tells you how customers behave, where your marketing is landing, and whether your store is actually growing, not just busy.

Why ecommerce KPIs matter for your business

Running an online store means data coming at you from every direction: your storefront, your ad platforms, your fulfilment system, your payment processor. The challenge is not finding numbers. It is knowing which ones actually tell you something useful, and having them reliable enough to act on.

Without a consistent view of the right metrics, decisions get made on gut feel, delayed reports, or numbers that contradict each other depending on which system you checked last. That is where confidence breaks down.

The right KPIs give you a shared, consistent picture of performance across your team. Instead of pasting figures into a spreadsheet or explaining your business to a generic AI tool from scratch every time you need an answer, you want these numbers in one place, always current, and always trustworthy.

The 19 ecommerce KPIs and metrics worth tracking

The metrics below cut through the noise. Each one connects to a real business outcome, whether that is more revenue, fewer lost carts, or customers who come back. Together, they cover the four areas that determine whether an ecommerce business is healthy: acquisition, conversion, fulfilment, and retention.

Here are 19 ecommerce KPIs and metrics worth tracking:

• Shopping Cart Conversion Rate: The share of sessions that result in a completed purchase. This is one of the most direct signals of whether your store experience and pricing are working together.
• Shopping Carts Abandoned: How many carts are started but never checked out. A high abandonment rate usually points to friction at checkout, unexpected shipping costs, or a trust gap.
• Cost per Order: What it costs your business to fulfil each transaction, including picking, packing, shipping, and overhead. Knowing this number tells you whether growth is actually profitable.
• Coupon Conversion: How effectively discount codes drive completed purchases. Useful for understanding whether promotions are pulling in new buyers or just discounting orders that would have happened anyway.
• Items per Order: The average number of products in each transaction. Rising Items per Order often signals that upsell or bundling strategies are working.
• New Customer on First Visit: How often a first-time visitor converts immediately. A low rate here suggests your landing experience or offer is not compelling enough to close on the first session.
• New Customers: The volume of customers making their first purchase in a period. This is your acquisition signal: it tells you whether top-of-funnel activity is translating into real buyers.
• On-Time Delivery: The percentage of orders that arrive when promised. Fulfilment reliability directly affects repeat purchase rates and customer trust.
• Order Value: The average revenue generated per completed order. Tracking this over time tells you whether pricing, product mix, or promotions are shifting your revenue per transaction.
• Product Views per Session: How many products a visitor browses before leaving. A low number may indicate navigation problems or poor product discovery. A very high number with low conversion may signal indecision.
• Returning Customers: The share of buyers who come back for a second or subsequent purchase. Retention is almost always more profitable than acquisition, and this metric tells you how well you are earning it.
• Revenue from New Visitors: Total revenue attributable to first-time visitors. This separates the contribution of acquisition from the contribution of retention in your overall revenue picture.
• Revenue from Repeat Online Customers: Revenue driven by your existing customer base. As this share grows, your business becomes less dependent on paid acquisition to hit revenue targets.
• Revenue per Visitor: Average revenue generated for every session on your store. This single number combines traffic quality and conversion efficiency into one view.
• Shipping Error Rate: The percentage of orders affected by fulfilment mistakes. Even a small error rate compounds quickly at scale and erodes customer trust faster than almost any other operational problem.
• Shopping Cart Sessions: Total sessions where a cart was opened. Paired with Conversion Rate and Cart Abandonment Rate, this gives you the full funnel picture from intent to purchase.
• Shopping Session Length: How long visitors spend on your store per session. Longer sessions are not always better: context matters. Compare this against conversion data to understand whether time on site reflects engagement or confusion.
• Unique Online Buyers: The count of distinct customers who purchased in a period. This is your true customer volume, distinct from order count, which can be inflated by repeat purchases.
• Visits to Purchase: The average number of sessions a customer needs before buying. A high number is not necessarily bad for considered purchases, but for impulse categories, it signals friction in the decision process.

How to use these metrics as a decision-maker

Knowing these numbers is only half the job. The other half is having them in front of you, reliably and without manual effort, so you can act on what they are telling you rather than spend time chasing them down.

A few principles that make ecommerce KPI tracking actually useful:

• Track trends, not snapshots. A single week's Conversion Rate tells you almost nothing. The same metric over 12 weeks tells you whether a change you made worked.
• Pair metrics to understand causation. Revenue per Visitor going up at the same time as Items per Order rising tells a different story than Revenue per Visitor rising while New Customers fall.
• Segment before you conclude. Blended numbers hide the truth. Cart Abandonment Rate looks different for mobile versus desktop, for new visitors versus returning ones, for paid traffic versus organic. Segment first.
• Connect every metric to a decision. If you cannot name what you would do differently based on a number moving up or down, it probably does not belong on your dashboard.

The goal is not a dashboard full of numbers. It is a clear, consistent view of your business that tells you what changed, why it matters, and what to do next, without having to figure it out yourself every time.