Racking Comparison Calculator

About the Racking Comparison Calculator

Choosing the right racking system is one of the most consequential decisions in warehouse design. Each system trades off storage density against selectivity — the ability to access any pallet at any time. The wrong choice leads to either wasted space or operational bottlenecks.

This racking comparison calculator lets you model four common racking types — selective, double-deep, drive-in, and push-back — side by side. Enter your available area and the calculator estimates capacity, cost per position, and selectivity for each system, helping you match the racking type to your inventory profile.

Whether you operate a high-SKU-count distribution center or a bulk storage facility with few SKUs, This calculator helps you evaluate the trade-offs and select the most cost-effective configuration.

Use the result to compare operating scenarios, pressure-test assumptions, and rerun the model when volumes, rates, or service targets change.

When This Page Helps

Different racking systems can vary capacity by 50-100% within the same footprint, and costs per position range from $50 to $150+. An informed comparison prevents overspending on unused capacity or under-investing in needed density. This calculator puts the key metrics side by side for quick decision-making.

How to Use the Inputs

1. Enter the usable floor area available for racking (sq ft).
2. Enter the number of rack levels your building height supports.
3. View the estimated pallet positions for each racking type.
4. Compare cost per position estimates across systems.
5. Review selectivity percentages to match your picking requirements.
6. Select the system that best balances density, cost, and access.

Example Calculation

Tips & Best Practices

• Use selective racking when you need 100% pallet selectivity and have many SKUs.
• Double-deep works well for moderate-velocity SKUs with at least 6+ pallets per SKU.
• Drive-in racking is ideal for bulk storage with few SKUs and LIFO rotation.
• Push-back racking provides high density with LIFO access and is easier to operate than drive-in.
• Consider mixing racking types by zone to optimize for different inventory profiles.
• Factor in forklift type costs when comparing — drive-in requires specialized lift trucks.

Selective Racking

Selective racking is the most common type, offering direct access to every pallet position. It's the most versatile but uses the most floor space per position due to wider aisle requirements. Ideal for operations with many SKUs and frequent picking.

Drive-In and Drive-Through

Drive-in racking eliminates aisles between rows, allowing forklifts to drive into the rack structure to place and retrieve pallets. Drive-in has one open end (LIFO) while drive-through has two open ends (FIFO). Both offer excellent density for bulk storage of few SKUs.

Push-Back and Double-Deep

Push-back racking uses nested carts on inclined rails. Each new pallet pushes the previous one back. Double-deep racking simply places two selective rows back-to-back. Both offer a middle ground between selective and drive-in density.

Frequently Asked Questions

• What is selectivity in warehouse racking?

  Selectivity is the percentage of pallet positions that can be accessed directly without moving another pallet. Selective racking offers 100% selectivity. Drive-in offers about 15% because you must access the front pallet first.

• Which racking type stores the most pallets?

  Drive-in racking typically provides the highest density because it eliminates aisles between rows. Pallets are stored 5-10 deep in lanes with a single entry point. This maximizes capacity but limits selectivity.

• Is push-back racking better than drive-in?

  Push-back is easier to operate and offers slightly better selectivity than drive-in. Forklifts don't enter the rack, reducing damage. However, push-back is typically limited to 2-6 pallets deep and costs more per position.

• How do I choose between racking types?

  Match racking type to your inventory profile. Many SKUs with low depth of stock need selective racking. Few SKUs with high quantity need drive-in or push-back. Moderate variety works well with double-deep.

• Can I mix racking types in one warehouse?

  Yes, many efficient warehouses use multiple racking types. Common approaches include selective racking in pick zones and drive-in or push-back for bulk reserve storage in the same facility.

• What about pallet flow racking?

  Pallet flow (gravity flow) racking provides FIFO rotation with high density. Pallets are loaded at one end and roll to the other on rollers. It's excellent for perishable goods but costs significantly more per position.