Both are steel, both lock, both stand about 1.8 metres tall, and both cost roughly the same per square metre of floor. The difference between a steel storage cupboard and a bank of lockers is not capacity, security or price. It is whether the space inside is divided, and who is accountable for what is in it.
Get that decision right and the rest of the specification follows. Get it wrong and you either buy twelve locks you did not need, or you buy one lock where you needed twelve.
The core difference: shared volume vs personal compartments
A cupboard is one enclosed volume behind one or two doors, with adjustable shelves. One lock, one key, one person or team responsible. Everything inside is available to whoever holds that key.
A locker is the same steel box subdivided into individually locked compartments. Our standard metric and standard imperial ranges run from 5 to 10 compartments per column, in bodies of one, two or three columns — so a single bank can hold anything from 12 to 30 separately locked spaces.
The space argument is a myth — here is the arithmetic
The most common reason given for choosing one over the other is floor space. It does not survive contact with the numbers.
A Probe Large Volume Cupboard is 1829 × 1220 × 457 mm — just over 1.0 m³ of storage on a 0.56 m² footprint. That is 1.83 m³ of storage per square metre of floor.
A triple-width locker bank is 1800 mm tall, 900 mm wide and 450 mm deep — 0.73 m³ on a 0.41 m² footprint. That is 1.80 m³ per square metre.
The two are within two per cent of each other. They have to be: both are roughly 1.8 m tall boxes, and a box's volume per square metre of floor is simply its height. Once you have chosen a height, the space question is settled and you should stop thinking about it.
What differs is what the volume costs and how it is carved up — and there the gap is wide.
Cost per usable space
Comparing headline prices is meaningless when one product provides one space and the other provides twenty. Divide instead.
| Option | Spaces | From | Per space |
|---|---|---|---|
| Probe Large Volume Cupboard (1829 × 1220 × 457 mm) | 1 shared | £1,077.90 | £1,077.90 |
| Imperial 6-door double-width locker bank | 12 locked | £801.18 | £66.77 |
| Metric 10-door double-width locker bank | 20 locked | £1,057.87 | £52.89 |
Read that table carefully, because it inverts the usual assumption. The cheapest complete locker bank we stock costs £276.72 less than the cheapest large-volume cupboard — and gives twelve people their own lock instead of none. And the 20-compartment metric bank costs almost exactly what the single-volume cupboard costs.
So the cupboard is not the budget option. You are not paying for storage when you buy one; you are paying for undivided storage — a clear internal volume that will take a bulky, awkward or long item that no 300 mm compartment would ever accept. That is a real requirement, and it is the only requirement a cupboard meets better.
When a steel storage cupboard is the right call
- The items are bulky, long or oddly shaped. Kit bags, machine spares, rolls, cable drums, PPE in bulk. A 1220 mm-wide clear interior with adjustable shelving takes what a compartment cannot.
- One team, one key, shared stock. Consumables, tooling and spares that everyone on the shift draws from. Individual locks here create friction, not control.
- You need shelving you can reconfigure. The Probe unit ships as configuration S00 — a fully open, clear-shelf interior — so you can fit your own dividers, racks or hanging rails. Lockers are fixed at the factory.
- The contents are hazardous. This is not a preference, it is a legal distinction — see below.
- You need serious door security on a single volume. The Probe cupboard uses a 3-point locking mechanism with a Type A cam lock and doors that swing through 110°; the GPC ranges use a seven-lever safe lock with full-length heavy-duty hinges and concealed fixings.
When lockers are the right call
- Individual accountability matters. If you need to know whose belongings are whose, or whose PPE went missing, one lock per person is the only structure that delivers it.
- People store personal items. Coats, phones, wallets, gym kit. Nobody accepts a shared cupboard for a wallet.
- Many users, small items. This is where the cost per space collapses to £52.89 and the cupboard cannot compete.
- Staff turnover or shift patterns. Reallocating one compartment is trivial; reallocating a shelf in a shared cupboard is a conversation.
- You need charging while stored. The PowerBox charging lockers put mains, USB-A and USB-C inside the compartment. No cupboard equivalent exists.
- You need to see in without opening. Vision panel and perforated doors allow inspection and airflow — useful for schools, damp kit and anywhere contents need checking.
The one place the choice is not yours
If you are storing hazardous substances, the decision is made by regulation, not preference. Neither a standard locker nor a general steel cupboard is suitable — and neither of ours claims to be.
A compliant cabinet is a different product with features a standard cupboard does not have: an integral liquid-tight sump to contain spillage, spill-retaining shelves, and a fire classification. The GPC CoSHH and hazardous substance cupboards are built from 1.5 mm welded steel with adjustable spill-retaining galvanised shelves, an integral sump and a Reaction to Fire Classification to EN 13501-1, in 1200 and 1800 mm heights at 900 or 1200 mm wide. The flammable liquid cabinets are 1.2 mm sheet steel with a return flange around doors and joints to prevent the passage of flame, designed against HSG51 and CS19.
Our guides to COSHH cabinet requirements and the difference between flammable and COSHH cabinets cover what applies. The short version: if a substance has a safety data sheet, it does not go in a locker or a general cupboard.
Cupboards vs lockers at a glance
| Steel storage cupboard | Locker bank | |
|---|---|---|
| Internal space | One shared volume, adjustable shelves | 5–30 fixed compartments |
| Locks | One (3-point or seven-lever) | One per compartment (Type A cam) |
| Accountability | Team or keyholder | Individual |
| Cost per space | From £1,077.90 | From £52.89 |
| Storage per m² of floor | ~1.83 m³ | ~1.80 m³ |
| Takes bulky/long items | Yes | No |
| Reconfigurable inside | Yes | No |
| Hazardous substances | Only the COSHH/flammable ranges | No |
Five questions that settle it
- Does one named person need to be responsible for the contents? Yes → lockers. No → cupboard.
- Will anything you store be longer or wider than 300 mm? Yes → cupboard. No → lockers.
- How many people need access to their own things? More than four → lockers, on cost alone.
- Does anything have a safety data sheet? Yes → neither; you need a COSHH or flammable cabinet.
- Will the internal layout need to change? Yes → cupboard, for the adjustable shelving.
Most workplaces need both
The two products solve different problems, and a well-specified facility usually runs them side by side: a locker run in the changing area for personal effects, and cupboards in the workshop for shared tooling, spares and consumables. Add cloakroom benches to the locker run — changing areas without seating congest quickly — and keep the hazardous cabinet in its own location entirely.
For the detail on each side of the decision: our guide to choosing steel cupboards and metal storage cabinets covers cupboard types and build quality, and how to choose metal lockers for the workplace covers locker sizing and specification. If you have settled on lockers, locker lock types explained is the next decision, and the full Probe range covers every configuration we stock. Sector-specific guides are available for schools, gyms and leisure and staff and workplace use.
Frequently asked questions
What is the difference between a locker and a cupboard?
A cupboard is a single enclosed volume with one lock and adjustable shelves. A locker divides the same volume into individually locked compartments — 5 to 10 per column, in one, two or three-column bodies. The choice is about whether the space needs dividing and who is accountable, not about capacity: at the same height, both give almost identical storage per square metre of floor.
Are lockers cheaper than cupboards?
Per usable space, dramatically. A 12-compartment locker bank starts at £801.18, or £66.77 per compartment, and a 20-compartment bank works out at £52.89. A large-volume cupboard starts at £1,077.90 for one shared space. The cupboard is the more expensive option and buys undivided volume, not more storage.
Can I store chemicals in a steel cupboard or locker?
Not in a standard one. Hazardous substances need a cabinet with an integral liquid-tight sump, spill-retaining shelves and a fire classification. Our COSHH and hazardous substance cupboards are built from 1.5 mm welded steel with an integral sump and a Reaction to Fire Classification to EN 13501-1; the flammable liquid range is designed against HSG51 and CS19. A standard locker meets none of that.
Do cupboards take up less floor space than lockers?
No, and this is the most common misconception. A large-volume cupboard gives roughly 1.83 m³ of storage per square metre of floor; a triple-width locker bank gives about 1.80 m³. They are within two per cent, because both are around 1.8 m tall. Choose on division and accountability, not footprint.
How many people can one locker bank serve?
Between 12 and 30, depending on configuration. A double-width bank gives 12 to 20 compartments and a triple-width bank 15 to 30. Count users first, then choose the door count — the cost per compartment falls sharply as the door count rises.
Can a cupboard's shelves be moved?
Yes. The Probe large-volume cupboard ships with a fully open clear-shelf interior so you can fit your own dividers, racks or rails, and the GPC ranges use adjustable galvanised shelves — reversible on the general heavy-duty units so they can also be used as trays. Locker compartments are fixed at manufacture and cannot be reconfigured.
Can I get both in the same finish?
Largely, yes. Probe lockers and the Probe large-volume cupboard are both UK-made from powder-coated cold-rolled mild steel in the same colour palette, so a matching locker run and cupboard is straightforward. The GPC industrial ranges use their own finishes — the general heavy-duty units are stove-enamel grey.