Enter the total height of the shelf, the thickness of the top shelf, the thickness of the bottom shelf, and the total number of shelves into the shelf spacing calculator to determine the shelf spacing; this calculator can also evaluate any of the variables given the others are known.

Shelf Spacing Formula

The following formula is used to calculate the shelf spacing for a shelf spacing calculator:

S = (H - T - B) / (N - 1)

Variables:

  • S is the shelf spacing
  • H is the total height of the shelf
  • T is the thickness of the top shelf
  • B is the thickness of the bottom shelf
  • N is the total number of shelves

To calculate the shelf spacing, subtract the thickness of the top and bottom shelves from the total height of the shelf. Then divide the result by the total number of shelves minus 1.

What is a Shelf Spacing?

Shelf spacing refers to the arrangement and allocation of space between products on a retail store shelf. It is a critical aspect of retail merchandising as it directly impacts the visibility and accessibility of products to customers. The spacing can be determined by various factors such as the size of the product, the popularity of the product, and the sales strategy of the retailer. For instance, high-demand products may be given more shelf space and placed at eye level to increase their visibility and sales. On the other hand, less popular products may be placed on lower or higher shelves with less space. Proper shelf spacing not only enhances the shopping experience for customers but also optimizes the use of retail space, potentially leading to increased sales and profits for the retailer.

How to Calculate Shelf Spacing?

The following steps outline how to calculate the Shelf Spacing.


  1. First, determine the total available shelf space (in inches).
  2. Next, determine the number of products to be displayed on the shelf.
  3. Next, gather the formula from above = Shelf Spacing = Total Shelf Space / Number of Products.
  4. Finally, calculate the Shelf Spacing.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Total Shelf Space (in inches) = 120

Number of Products = 15