What it means
Warehouse rent and equipment cost money whether shelves are full or empty, and utilisation helps show how much storage capacity is actively used. Define available capacity as the approved storage positions or usable volume, not the entire building footprint including offices and safety routes.
Define occupied capacity in the same unit, because pallet positions divided by pallet positions is meaningful while pallet count divided by cubic metres is not. A position measure is simple: if 1,700 of 2,000 usable pallet slots are occupied, utilisation is 85%.
A cubic-volume measure can capture varying box sizes, but measuring actual occupied volume and usable vertical capacity takes more care. Specify timing as well, since a single quiet day may show lower use than a seasonal peak, and both an average and a peak can matter.
Do not aim for 100%, because space is needed for movement, picking, packing, receiving and safe access, and a full storage map can leave no room for change. The best level depends on turnover and layout, since fast-moving inventory needs easy access while slow-moving items may be stored densely.
Avoid a universal 85% rule: NetSuite says typical ranges vary and there is no single best target, so an 85% figure is a planning signal, not a hard safety standard. Measure congestion separately, because travel time, picking accuracy and damage may deteriorate before a headline occupancy figure looks extreme.
Consider seasonal receipts, since a warehouse at 80% average may overflow during a short import peak and should plan for the maximum expected load. Check unusable slots as well, because damaged racking or blocked positions should not be counted as available until safely restored.
Look upward and sideways carefully: higher racks can add capacity but need suitable equipment, trained staff and weight ratings, and narrower aisles can create more storage positions but may require different lift equipment and traffic controls. Review SKU layout, because fast movers placed far away can slow orders even if utilisation is moderate, and check inventory accuracy, since system stock in a location that is physically empty (or the reverse) distorts the metric and operations.
Deal with dead stock too, as products unlikely to sell occupy useful space, so review disposal, return or promotion options against their cost. Avoid moving the problem, since clearing stock to an external warehouse may lower the local utilisation number while raising total storage cost, and compare cost per position because a low rate can increase fixed cost per used slot even though the extra space may support service and growth.
Fire exits, load limits and forklift routes are non-negotiable, so never improve a percentage by using prohibited space, and set an action threshold such as slotting changes or overflow planning for a sustained high figure or consolidation for a low one. NetSuite defines warehouse utilisation as used storage over available storage and describes the trade-off with safety and workflow, while Extensiv discusses how 3PLs calculate and interpret capacity; before leasing more space, test whether better layout, faster turnover or an adjusted assortment could create capacity, because for an owner the metric is a capacity signal, not a trophy.
In practice
Real-world examples.
Example
A facility uses 1,700 of 2,000 approved pallet positions, so position utilisation is 85%.
Example
A seasonal importer tracks peak occupied slots rather than relying only on its quiet-month average.
Example
A warehouse removes obsolete stock and improves access before renting another building.
Formula
Calculation
Position utilisation = occupied approved storage positions / total approved usable storage positions x 100.
Worked example. A facility has 2,000 approved pallet positions, of which 100 are blocked for racking repairs, so 1,900 are usable. With 1,700 occupied, utilisation is 1,700 / 1,900 x 100 = 89.5%. Against all 2,000 positions it would be 85%, so the team must state which denominator it uses.
A volume-based method needs volume in both numerator and denominator. If goods occupy 6,800 cubic metres of 8,000 cubic metres of usable racking volume, utilisation is 6,800 / 8,000 x 100 = 85%.Case study
Seen in the real world.
Fictional case: Crescent Parts reached 95% of pallet slots and struggled with slow picking. It found obsolete stock and badly placed fast movers, then reorganised and reduced occupancy to 80%. Order flow improved enough to defer a proposed warehouse move. This fictional case shows why a lower percentage can be operationally better.
The company also compared its cost per used position before and after the clean-up. With the same monthly rent spread over fewer but more active pallets, the figure rose slightly, but picking errors and overtime fell by more than the difference. Its managers now review utilisation together with travel time and order accuracy rather than as a stand-alone target.
Watch out
Common mistakes.
- Dividing occupied pallets by the whole building area rather than matching units.
- Treating 100% occupancy as the ideal despite safety and movement needs.
- Using one average while ignoring seasonal peaks and blocked positions.
Questions
People also ask.
Is 85% always too high?
No. Suitable occupancy depends on layout, stock turnover, equipment and peak demand.
Should aisles count as empty capacity?
No. Define usable storage separately from necessary movement and safety space.
Can better layout help?
Yes, if it preserves safe access and improves location use and workflow.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%