Low TV Unit Measurements Made Simple: Will It Fit Your Room?

A low TV unit will fit your room if three measurements work together: the unit is at least as wide as your TV (ideally 10 to 20cm wider on each side), it leaves a clear walkway of around 80cm in front of it, and it places the centre of the screen close to your seated eye level. Most low units stand between 30cm and 50cm high and are 30cm to 45cm deep, so the key figures to check at home are your wall width, your sofa height and the distance between the two.

That is the short answer. The longer one is about taking a few careful measurements before you fall for a particular design. Browsing our collection of modern TV units UK sale is far easier once you know your numbers, because you can rule out anything too wide, too deep or too tall at a glance. Here is how to take those numbers and what to do with them.

What Counts as a Low TV Unit?

Low TV units are long, horizontal pieces that sit close to the floor. They are sometimes called media benches or low sideboards, and they have become a staple of the modern British lounge because they suit large, slim screens and keep sightlines open across the room.

They are usually lower than a standard sideboard, which tends to sit at around 75cm to 85cm high. That lower height changes how you measure, because it affects where your TV ends up relative to your eyes. It also changes how the unit relates to everything else in your modern living room furniture UK, from the height of your coffee table to the arms of your sofa.

The Tools You Need

Keep this simple. You need a steel tape measure, a pencil, some masking tape and a notepad or your phone. Masking tape is the most underrated tool here: you will use it to mark the outline of a unit on the floor and wall so you can see how it feels before anything arrives.

Measurement One: Width

Measure your wall

Measure the full width of the wall where the unit will go. Then measure again between any obstacles: a radiator, a door frame, a window reveal, a chimney breast or a light switch you still want to reach. The usable width is the smaller of these figures, not the wall as a whole.

Measure your TV

TV sizes are quoted as a diagonal, which tells you very little about width. As a rough guide, a 50 inch screen is around 110cm wide, a 55 inch around 123cm, a 65 inch around 145cm and a 75 inch around 167cm. Check your own model’s specification for the exact figure, including any bezel.

Match the two

A low TV unit looks balanced when it is wider than the screen. A unit the same width as the TV can work, but it often looks slightly top heavy. Aim for a unit 20cm to 40cm wider than your TV in total. In a long room, a unit that runs most of the wall can look deliberate and architectural; just leave some breathing space at each end so it does not feel crammed in.

Measurement Two: Height

Height is where low units need the most thought, because the goal is comfortable viewing.

Find your seated eye level

Sit on your sofa in your usual position and ask someone to measure from the floor to the level of your eyes. For many sofas this lands somewhere around 100cm to 110cm, but low, deep sofas can bring it down noticeably, and firmer, upright seating can push it up.

Work out where the screen will sit

If your TV will sit on the unit on its stand, add the unit height to the distance from the bottom of the TV stand to the centre of the screen. If the total is close to your seated eye level, or slightly below it, you are in a comfortable range. If your TV is going on the wall, the unit height matters less for viewing and more for proportion: it should leave a pleasing gap between the top of the unit and the bottom of the screen, often around 15cm to 30cm.

Consider what sits nearby

A low unit that sits noticeably lower than your coffee table can look odd from across the room. It is not a rule, but it helps if the heights of your low pieces feel related, even if they do not match exactly.

Measurement Three: Depth

Depth is the figure people forget, and it is often the one that decides whether a unit feels right. Most low units run between 30cm and 45cm deep.

Check two things. First, that the depth accommodates your equipment. Measure your soundbar, games console, router and any set top box, and allow a few extra centimetres at the back for cables and ventilation. Second, check the footprint of your TV stand if the TV will sit on top. Some stands have feet placed near the outer edges, which means the unit must be wide enough to support both feet fully, not just deep enough.

In narrow rooms, especially in Victorian and Edwardian terraces where the lounge doubles as a through route, every centimetre of depth counts. A shallower unit with the TV mounted on the wall can free up a surprising amount of floor space. If you are considering that route, our range of wall TV brackets UK sale will help you find a mount suited to your screen size.

Measurement Four: Clearances and Walkways

A room needs space to move through comfortably. As a working guide:

• Allow around 80cm to 90cm for a main walkway in front of the unit, and no less than about 60cm for a route that is used less often.
• Leave enough room in front of any drawers or doors to open them fully while standing, which usually means the drawer depth plus room for your body.
• Keep the unit clear of the radiator’s full width, and avoid placing it directly in front of one, so heat can circulate.
• Check that doors into the room can swing open without catching the end of the unit.

Measurement Five: Viewing Distance

Viewing distance is not strictly a question of whether the unit fits, but it affects where the unit should go. A widely used rule of thumb places seating roughly one to one and a half times the screen diagonal away for 4K sets, and a little further for older HD screens. So a 55 inch TV works well with seating somewhere around 140cm to 210cm away. If your room is small, a slightly smaller screen on a well proportioned low unit is often more comfortable than a very large screen at close range.

Use Masking Tape to Test the Fit

Once you have a unit in mind, mark its width and depth on the floor with masking tape. Then mark the height on the wall behind. Leave it in place for a day or two and walk around it as you normally would. You will quickly notice whether the corner catches your shin on the way to the kitchen, or whether the unit feels lost on a long wall.

Do the same with the TV. A piece of card cut to the size of the screen and taped to the wall shows you instantly whether the proportions are right.

Common Low Unit Layouts and How to Measure for Them

Centred on a feature wall

This is the most familiar layout. Find the centre point of the wall, mark it, and measure out equally in both directions. If a radiator or window sits off centre, you may prefer to centre the unit on the seating instead, so the screen faces the sofa directly.

Across a chimney breast

If the fireplace is no longer in use, a low unit can run across the breast. Measure the breast width, not the full wall, and allow a little space either side so the unit does not look squeezed. If the fireplace is still in use, never place a unit or TV where heat will reach it.

In a corner

For rooms where a straight wall will not work, a corner piece is often the answer. Measure along both walls from the corner and account for skirting boards. Our guide on choosing between a floating or corner TV unit for UK homes goes through that decision in detail and explains which room shapes suit each style.

Small Room? Adjust Your Expectations Sensibly

In compact flats and box rooms converted into snugs, it is tempting to buy the largest unit that squeezes in. It is usually better to leave space around it. A unit that fills two thirds of a wall often looks more considered than one that runs wall to wall and blocks a socket. For ideas on getting a polished look in a tight space, our piece on designer small TV unit style for UK homes has practical suggestions.

A Quick Checklist Before You Order

• Usable wall width, measured between obstacles.
• TV width from the manufacturer’s specification.
• Seated eye level from your usual sofa position.
• Equipment depth, plus space for cables.
• Walkway and door clearances.
• Access route: hallway width, stair turns and doorways the unit must pass through on delivery.

That last point is often overlooked. A long unit may fit the room perfectly and still struggle around a tight staircase, so measure the route as well as the destination. When you are ready to compare sizes and finishes, you will find a wide choice at Furniture in Fashion, with free delivery to most UK mainland postcodes.

Frequently Asked Questions

How much wider than the TV should a low TV unit be?

A total of 20cm to 40cm wider than the screen usually looks balanced. It gives the TV a visual base and leaves room for a lamp, a plant or speakers at either end.

What height should a low TV unit be?

Most sit between 30cm and 50cm high. The right height for you depends on your seated eye level and whether the TV sits on the unit or on the wall above it.

How deep should a TV unit be?

Around 30cm to 45cm suits most homes. Choose the shallower end in narrow rooms, and make sure your equipment and TV stand fit comfortably on the top and inside the unit.

Can a low TV unit go in front of a radiator?

It is best avoided. A unit in front of a radiator blocks heat and can warm electrical equipment. Choose another wall, or mount the TV elsewhere, if you can.