How Many Lockers Do You Need? Capacity Planning Guide for Changing Rooms

Choosing the right number of lockers is one of the most important decisions in locker room planning. Too few lockers create frustration, congestion and poor organisation. Too many can waste space and reduce the efficiency of the room.

This guide focuses only on calculating how many lockers you need based on users and usage patterns. It does not cover layout or spacing.

This guide focuses on one question only: how many lockers do you actually need? The answer depends on user numbers, peak demand, whether lockers are shared or dedicated, and what people need to store.

If you want the wider overview first, see our locker room design UK guide.

Why locker capacity matters

Locker numbers affect how well the changing room performs. If capacity is too low, users compete for storage and the room becomes harder to manage. If capacity is too high, valuable space is taken up by lockers that may not be needed.

• supports efficient storage
• reduces pressure at busy times
• improves organisation
• helps lockers get used effectively
• avoids over- or under-specifying the room

Getting the number right is the foundation of a practical locker provision.

Step 1: Start with peak demand

The starting point is not total users, but how many people need lockers at the same time. A site may have a large headcount overall, yet only a smaller number may need storage during any one period.

Ask:

• How many users are on site in total?
• How many need lockers at peak times?
• Do users arrive in waves, such as shift changes or class changes?
• Is usage steady or spread across the day?

Peak demand, not total headcount, should guide your calculation.

Step 2: Decide whether lockers are shared or dedicated

Not every site needs a one-to-one locker ratio. In some settings, lockers are assigned to the same user every day. In others, lockers are shared across multiple users during the day.

Dedicated lockers are common in workplaces, schools and industrial settings where users need reliable personal storage.

Shared lockers are often used in gyms, leisure facilities and other short-term environments where the same locker can serve multiple users across the day.

This choice has a major effect on the total number required.

Step 3: Check what each user needs to store

Locker numbers are affected by what users need to put inside them. If users only need space for small personal items, a more compact locker format may be enough. If they need to store clothing, bags, PPE or larger equipment, each locker may need more space.

This means capacity planning should be based on real storage needs, not just user numbers alone.

For product options, see our locker range.

Step 4: Check the number against the room

Once you have an estimated locker number, check whether the room can support it realistically. Capacity should fit the room, not overload it.

If you need more detail on room size and usable footprint, see our locker room size and space planning guide.

Step 5: Allow for growth

Locker demand is rarely fixed. Workforces grow, schools expand and facilities become busier. Planning only for current use can create problems later.

• allow a buffer above current demand
• plan for peak use rather than average use
• consider future growth where possible

This helps avoid overcrowding or costly reconfiguration later on.

Typical locker ratios by environment

While every site is different, some general patterns can help guide early planning.

• schools: often close to 1:1 or shared between small groups
• workplaces: often 1:1 for staff or slightly reduced if shifts are staggered
• gyms: fewer lockers than users due to short-term use
• industrial environments: usually 1:1 due to PPE and clothing needs

These are guidelines, not rules. Actual requirements depend on how the space is used.

Common capacity planning mistakes

• using total users instead of peak demand
• ignoring whether lockers are shared or dedicated
• forgetting what users actually need to store
• assuming demand will stay fixed
• proposing more lockers than the room can support

Most of these errors come from treating locker numbers as a rough guess instead of a planned decision.

A simple locker capacity checklist

Before finalising your locker numbers, check:

• How many users need lockers at peak times?
• Will lockers be shared or dedicated?
• What do users need to store?
• Can the room support the number proposed?
• Is there enough allowance for future growth?

If these questions are answered clearly, your locker capacity will be much more accurate.

Final thoughts on locker capacity planning

Choosing the right number of lockers is about balancing user demand, allocation method, storage needs and room limits. The best solution supports how the space is actually used, rather than simply fitting in as many lockers as possible.

When capacity planning is done properly, the locker provision becomes easier to manage and better suited to long-term use.

For broader design guidance, read our locker room design guide. For room-fit guidance, see our locker room size and space planning guide.

Explore our locker range, or browse the Total Locker Service blog for more planning guides.

• Locker room size and space planning
• Workplace lockers guide
• View locker ranges