Buying Large Kitchen Appliances: Sizes, Capacity and Energy

Almost every UK freestanding large appliance is built for a 600mm wide by 850mm high aperture, so measure the gap, the door swing and the existing plumbing before anything else. Choose drum or fridge capacity by household size, compare the A to G energy label on like-for-like models, and leave 20 to 30mm of clearance at each side for ventilation.

For anyone with a gap in a kitchen or utility room and a washing machine, dishwasher or fridge freezer to buy. Five measurements decide whether a large appliance fits, three capacity scales decide whether it suits the household, and the rescaled A to G label tells you nothing unless you compare it correctly.

What are the standard UK large appliance sizes?

A freestanding under-counter appliance in the UK is built to slot into a 600mm wide by 850mm high aperture, and that one figure is what makes the category shoppable. UK base units are 600mm deep with the worktop at 900mm, so a machine at 845 to 850mm high on adjustable feet lands just under it.

Width barely varies. Depth varies a great deal, and depth is what catches people out.

Two rows are the ones that go wrong. A 12kg washing machine at 640mm deep stands 40mm proud of a 600mm cabinet run, and an American-style fridge freezer needs a purpose-made 900mm gap. Everything else here is interchangeable within a 600mm slot.

Measure in this order: gap, depth, door swing, services, route in

Five measurements decide whether an appliance fits, and they apply identically to a washing machine, a tumble dryer, a dishwasher and a fridge freezer. Take them in this order, because each can rule out a model before you spend time on the next.

1. Measure the gap at three heights. Take the width at the floor, at mid height and just under the worktop, and work to the narrowest of the three. Skirting boards, pipe boxing and bowed cabinet sides routinely take 10 to 20mm out of a nominal 600mm gap.
2. Measure the depth to the front edge of the worktop, then subtract what the hoses and power lead need behind the machine. Beko's own size guide asks for at least 150mm behind a washing machine; most real installations end up with 50 to 80mm because the hoses fold.
3. Check the door swing and the hinge side. A front-loading drum door opens through roughly 180 degrees. A dishwasher door drops forward around 550mm into the room. A fridge freezer needs at least 90 degrees to get the salad drawer out, and most models have reversible doors — confirm that before you commit to a side.
4. Check the services at the back of the gap. A washing machine or dishwasher wants a 3/4 inch BSP threaded cold water valve, a waste standpipe or trap spigot holding the hose between 600 and 900mm above the floor, and a reachable 13A socket. A fridge freezer needs only the socket.
5. Measure the route in. The commonest UK internal door is 762mm wide, which a 600mm appliance clears comfortably and a 900mm American-style fridge freezer does not. Measure the narrowest point of the whole route — a half-landing turn, a porch, a galley between two runs of units — not the front door.

Write all five numbers down before you browse. Marqet's position is blunt: a returned appliance is usually a measuring failure rather than a product failure, and steps three and five are the two people skip.

Which appliances suit your kitchen layout?

The layout of the room, not the size of the household, decides which appliances you can have at all. A kitchen with one spare 600mm slot is a different buying problem from a utility room with two.

One slot points to a washer-dryer, two slots almost always point to separates; the drying-capacity maths behind that sits in our guide to choosing between a washer-dryer and separate machines.

Which capacity does your household actually need?

Capacity is measured three ways — kilograms for a drum, litres for refrigeration, place settings for a dishwasher — but all three map onto the same household bands. One kilogram of rated drum capacity is roughly one full load of dry laundry; one place setting is the crockery and cutlery for one person at one meal.

Those laundry bands follow Beko's published size guide: 7kg for one to two people, 8kg and 9kg for two to four, 9kg to 12kg for larger families. The refrigeration bands follow the capacity guidance common across UK appliance retailers — up to 200 litres for one or two people, 200 to 300 for three or four, 300 upwards for five or six.

The last two rows matter more than the headcount. A couple who batch-cook need more freezer than a family of four who shop fresh twice a week, which is why the fridge freezer split between 50/50, 60/40 and 70/30 is a shopping-habit decision. And a drum sized for bedding beats a drum sized for people: washing machine capacity in kg by household covers which duvets fit which drum.

Integrated or freestanding: which should you buy?

Buy freestanding unless the kitchen was designed around integrated appliances, in which case there is no real choice. A freestanding appliance has a finished front, stands in a 600mm gap, and can be swapped for any other 600mm machine in ten years. An integrated one is fixed in a cabinet behind a matching door and must match the aperture the fitter left.

The dimension difference is the practical one. Integrated laundry and dishwashing appliances are typically around 820mm high rather than 850mm, because the plinth and the cabinet door take the rest of the space under a 900mm worktop, and commonly 540 to 570mm deep to sit flush.

• Fully integrated hides the controls behind the cabinet door. Cleanest finish, highest price.
• Semi-integrated leaves a control strip visible above a shorter cabinet door. Easier to use, visibly an appliance.
• Freestanding shows the whole appliance front. Widest choice, lowest price at the same specification, and the only type you can move house with.

Marqet's view: on a like-for-like specification, freestanding gets you more drum, more litres or more place settings for the money, because you are not paying for a chassis designed to disappear. Browse the large appliances range and filter on width first.

Slimline means width on a dishwasher and depth on a washing machine

Slimline describes two different measurements depending on the appliance, and confusing them is how people order a machine that does not fit. On a dishwasher it means 448 to 450mm wide instead of 598 to 600mm, height and depth unchanged. On a washing machine it means a shallower cabinet, roughly 490 to 560mm deep instead of 580 to 640mm, with the width still 595 to 600mm.

Both cost capacity. A slimline dishwasher gives up three to five place settings against a full-size model, and a slimline washing machine gives up drum: 7kg is the common ceiling on a shallow cabinet, while 9kg and above almost always needs 580mm or more of depth. Choose the slimline dishwasher when the run has 450mm to spare and you would not fill a full-size machine daily; choose the slimline washing machine only when the gap is under 570mm deep.

How do you compare the A to G energy label fairly?

Compare only like-for-like models, because the A to G class is calculated against the appliance's own capacity. A 9kg machine rated C is not necessarily thirstier than a 7kg machine rated B: the class is an efficiency measure, not a consumption figure, so the number underneath it is what you compare.

The figure to compare depends on the product, and the two units are not interchangeable. Fridges and freezers declare energy in kWh per annum. Washing machines, washer-dryers and dishwashers declare kWh per 100 cycles, measured on the standard eco programme.

• Washing machines also carry rated capacity in kg, litres per cycle, a spin-drying class from A to G, the eco programme duration, and noise in dB with a class from A to D.
• Dishwashers carry place settings, litres per cycle, duration, and the same noise figure and class.
• Fridge freezers carry fridge and freezer litres separately, plus noise.

One warning. The UK label was rescaled in March 2021, A+, A++ and A+++ were removed, and the A class was left deliberately near-empty, so a genuinely efficient appliance today often reads C, D or E. A listing still showing a plus class is describing a pre-2021 label. Field by field, that is covered in our explainer on UK energy labels A to G and what the 2021 rescale changed.

Do you need a plumber or an electrician?

You need neither if the three connections already exist. A washing machine, washer-dryer or dishwasher needs a 3/4 inch BSP threaded cold water valve, a waste connection and a 13A socket; where all three are present, fitting it means screwing on the fill hose, hooking the waste hose into the standpipe and plugging in.

Call a plumber when there is no valve on the supply, no waste connection in reach, or the standpipe cannot hold the hose between 600 and 900mm above the floor — that height is what stops the machine siphoning its own water away mid-cycle. Call an electrician for a new socket or circuit.

Three details cause most call-outs: transit bolts left in a new washing machine, a machine never levelled on its feet that walks across the floor at spin, and a fridge freezer switched on before the settling period in its manual has passed.

What Marqet stocks in large appliances

Large appliances are the healthiest shelf on the Marqet catalogue. A live check of large appliances on 11 September 2026 returned 166 results with none out of stock — the strongest availability measured anywhere on the site — and the median large-appliance price is £659.99, three times the £219.99 median of the catalogue as a whole. Kitchen appliances returned 128 results on the same check.

By category on that check: 39 in fridges and freezers, 22 in washing machines, 18 dishwashers, 21 washer-dryers and 17 tumble dryers. On brands, Marqet lists 58 Bosch products across the site with 38 of them on the Bosch large appliances shelf, and 26 Samsung large appliances on the Samsung large appliances shelf.

Our honest position: the range is deep enough to fill a 600mm gap several ways over, and thin enough that you should buy when you find the specification rather than wait for more choice. Every model sheet carries the width, height and depth the five measurements need.

Before you order: the eight-point check

1. Narrowest width of the gap, taken at floor, mid height and worktop.
2. Depth to the front edge of the worktop, minus 50 to 80mm for hoses.
3. Height under the worktop: 845 to 850mm for a freestanding machine.
4. Hinge side chosen, and the door confirmed reversible if you need it.
5. Floor clear for the door swing: about 550mm forward for a dishwasher.
6. Cold water valve, waste connection and 13A socket present and reachable.
7. Narrowest point of the route in, turns and stairs included.
8. Capacity set by household, then checked against bedding or batch-cooking.

Frequently asked questions

What are standard kitchen appliance sizes in the UK?

A freestanding under-counter appliance in the UK is built to sit in a 600mm wide by 850mm high aperture. Washing machines, washer-dryers, tumble dryers and full-size dishwashers all measure roughly 595 to 600mm wide and 845 to 850mm high. Depth varies most: 490 to 560mm on a slimline or 7kg washing machine, 580 to 640mm on a 9kg or larger drum. Slimline dishwashers are 448 to 450mm wide.

What is the difference between integrated and freestanding appliances?

A freestanding appliance has a finished front and stands on its own in a 600mm gap. An integrated appliance is fixed inside a cabinet and wears a matching kitchen door, so the appliance front is hidden. Fully integrated models put the controls inside the door; semi-integrated models leave a control strip visible at the top. Integrated units are usually around 820mm high to sit under a worktop with a plinth.

How much clearance does a freestanding appliance need?

Beko's own size guide asks for at least 25mm of clearance at each side of a washing machine and at least 150mm behind it for hoses and airflow. Bosch asks for at least 50mm between refrigeration appliances standing side by side and around 50mm behind a fridge freezer for ventilation. Always check the installation sheet for the model you are buying, because the figures vary.

What size appliance fits a 600mm kitchen gap?

A 600mm gap takes a standard freestanding washing machine, washer-dryer, tumble dryer, full-size dishwasher, under-counter fridge or under-counter freezer, because those appliances are built at 595 to 600mm wide. A 600mm gap is a tight fit rather than a comfortable one, so a gap of 620 to 650mm makes the machine far easier to slide in, level and pull out for servicing.

Do I need a plumber to install a washing machine?

Not if the connections already exist. A washing machine needs a 3/4 inch BSP threaded cold water valve, a waste standpipe or trap spigot, and a 13A socket. If all three are in place, connecting the machine is a plug-and-screw job. You need a plumber when there is no valve or no waste connection, and an electrician when a new circuit or socket has to be added.

Which appliance capacity do I need for a family of four?

A household of four wants an 8kg to 9kg washing machine drum, a fridge freezer of 200 to 300 litres total capacity, and a full-size 600mm dishwasher rated at 12 to 14 place settings. Step up to a 10kg drum and 300 litres or more if you wash bedding weekly, batch-cook, or buy frozen food in bulk rather than shopping fresh.