Tools

Free Shopify lost sales calculator

Find out how much sales you are losing on out of stock products in your store
Start For Free

Out of stock sales Calculator

See how much you are potentially losing when you have an out of stock product
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Lost Sales Results

Revenue lost due to stockouts
8.3 M
$
Revenue of Back in Stock
8.3 M
$
Total revenue
8.3 M
%
Learn how to minimize lost sales with Shopify back in stock and preorder widgets of Notify Me. Discover why customers abandon their carts, the contributing factors, and actionable strategies using insights from your store’s data.

1. Definitions

The following terms used in this Agreement have the meanings set forth below:
  1. “Avg Monthly Revenue”: refers to the average 12-month revenue of your store from all the items sold.
  2. "Avg Monthly Out of stock rate" refers to the percentage of the products that are not in stock in your store in a 12-month span.
  3. “Traffic to request rate” refers to the percentage of your conversion rate on all lead magnet tools such as popups and forms

Frequently asked questions

What does the lost sales calculator estimate?
It projects demand you may have missed during out-of-stock periods based on the inputs you provide — useful for planning inventory and marketing.
Who should use this calculator?
Shopify merchants and operators who want a quick, quantitative nudge to invest in stock alerts, preorders, and better availability.
How is lost sales different from lost revenue?
Lost sales often focus on unit demand; revenue adds price and margin context. Use both to tell a full story to your team.
What should I do after I see the result?
Tighten replenishment, turn on back-in-stock capture on sold-out SKUs, and add preorder or waitlist where it fits your catalog.