How to Calculate Warehouse Storage Capacity

Understanding how to calculate warehouse storage capacity is essential for companies that want to maximize efficiency without expanding their facilities. Many warehouses run out of space not because the building is too small, but because the storage system is not properly designed.

By calculating storage capacity accurately, businesses can determine how many pallet positions their warehouse can support, how efficiently their cube space is being used, and whether new racking systems or layout improvements are needed.

In this guide, we will walk through the key factors used to calculate warehouse storage capacity and how businesses can increase storage density while maintaining operational efficiency.

Step 1: Measure Total Warehouse Space

The first step in calculating warehouse capacity is determining the total available floor space.

To calculate this:

Warehouse Square Footage =
Length × Width

For example:

A warehouse measuring 200 ft × 100 ft equals:

20,000 square feet of total floor space

However, not all of this space can be used for storage. Areas for shipping, receiving, offices, and forklift aisles must also be considered.

Step 2: Calculate Available Storage Space

Once total space is known, the next step is determining the portion that can actually be used for pallet storage.

Most warehouses allocate space approximately like this:

• 40–60% storage
• 20–30% aisles and forklift travel
• 10–15% staging and shipping areas
• 5–10% offices and support areas

For example:

20,000 sq ft warehouse
50% used for storage

10,000 sq ft available for pallet racking

This is the area where storage systems will be installed.

Step 3: Determine Pallet Dimensions

Next, identify the size of the pallets being stored.

The most common pallet size in North America is:

48″ × 40″ pallet

Each pallet typically requires:

• 13.3 sq ft footprint
• additional space for rack structure and clearance

In pallet racking systems, pallets are typically stored two or three per beam level depending on rack configuration.

Step 4: Calculate Pallet Positions Per Bay

A typical pallet rack bay might store:

• 2 pallets per level
• 4–6 vertical levels

Example:

2 pallets × 5 levels =
10 pallet positions per bay

If a warehouse installs 200 rack bays, total pallet positions would be:

200 × 10 = 2,000 pallet positions

This provides a realistic estimate of storage capacity.

Step 5: Calculate Vertical Cube Utilization

Many warehouses underestimate the value of vertical storage.

To determine how efficiently vertical space is used, calculate warehouse cube utilization.

Formula:

Total pallet volume stored ÷ total building volume

For example:

Warehouse height: 30 ft
Floor space: 20,000 sq ft

Total building cube:

600,000 cubic feet

If pallet storage uses only 15 ft height, the warehouse is using only 50% of its available vertical capacity.

Installing taller racking systems can significantly increase storage density.

Step 6: Consider Storage System Type

The type of racking system installed has a major impact on storage capacity.

Different systems provide different storage densities.

Examples include:

Selective Pallet Racking
• Direct access to every pallet
• Most flexible storage option

Drive-In Racking
• High density storage
• Ideal for large quantities of similar products

Push-Back Racking
• Increased storage density
• Reduced aisle space

Pallet Shuttle Systems
• Very high storage density
• Ideal for cold storage environments

Selecting the correct system can dramatically increase pallet capacity without expanding the warehouse footprint.

Step 7: Evaluate Forklift Aisle Requirements

Aisle width plays a major role in storage capacity.

Typical aisle widths include:

• Standard forklift aisles: 12–14 ft
• Narrow aisle systems: 8–10 ft
• Very narrow aisle systems: 6–7 ft

Reducing aisle width can increase pallet positions significantly, but requires specialized material-handling equipment.

Why Storage Capacity Calculations Matter

When companies understand their warehouse capacity, they can make better decisions about:

• expanding storage systems
• improving warehouse layouts
• investing in higher-density racking
• increasing operational efficiency

In many cases, a properly designed storage system can increase pallet capacity 30–50% within the same building.

This makes warehouse optimization far more cost-effective than expanding or relocating facilities.

Optimize Your Warehouse Storage with Atlantic Rack

At Atlantic Rack, we specialize in designing storage systems that maximize warehouse capacity while improving efficiency and safety.

Our team evaluates facility layouts, ceiling heights, forklift operations, and inventory requirements to engineer storage solutions that unlock unused warehouse space.

Whether your facility needs pallet racking, cantilever systems, mezzanines, or high-density storage solutions, we help businesses transform their warehouses into high-performance logistics environments.

Contact Atlantic Rack today to discover how much storage capacity your warehouse could gain.