July 16, 2026 · 5 min read

Shopify inventory replenishment spreadsheet (free template)

For many growing ecommerce brands, a Shopify inventory replenishment spreadsheet is the first step toward managing supplier orders. When you outgrow Shopify's basic count view, a sheet helps you calculate when and how much to buy.

If you are moving off Stocky ahead of the August 31, 2026 shutdown and aren't ready to pay for heavy ERP software, spreadsheets are a viable transition tool. Here is how to build a replenishment calculator, and a free template structure to get started.

How to structure your replenishment spreadsheet

A working replenishment template needs five core columns to calculate reorder quantities:

1. SKU & Variant Name: The identifier to match back to Shopify.
2. On Hand Stock: Current inventory quantity (export this weekly from Shopify).
3. Sales Velocity (Daily): The average units sold per day (calculated from past sales).
4. Lead Time (Days): How long the supplier takes to deliver the product after ordering.
5. Reorder Point (ROP): The trigger level where you need to place a new order.

The Replenishment Formula

To calculate when and how much to order, use the standard reorder point formula:

Reorder Point = (Daily Sales Velocity × Lead Time in Days) + Safety Stock

If an SKU sells 5 units a day, the supplier takes 14 days to deliver, and you want a 7-day safety buffer (35 units):

Reorder Point = (5 × 14) + 35 = 105 units

If your On Hand Stock drops below 105, it is time to draft a new purchase order.

The Limits of Manual Sheets

While Excel and Google Sheets are great for modeling, they introduce severe operational risks over time:

• Out of sync: As soon as you sell an item on Shopify or receive a supplier shipment, your spreadsheet is out of date.
• No historical history: You cannot easily see what you paid a supplier six months ago or track partial shipments.
• Human error: A single broken cell formula can lead to massive over-ordering or running out of your best-sellers.

Moving from Sheets to Automated Reordering

Reorda eliminates the spreadsheet chore. It pulls your real-time Shopify inventory, monitors daily sales trends, automatically flags low stock, and drafts supplier purchase orders for you in one click.

To understand the math behind the automation, read our detailed guide on how to calculate a reorder point on Shopify.