Inches to Centimeters for Screen Sizes (in to cm)

Working Out How Much Wall a Screen Actually Takes Up

Screens are the last consumer product still sold almost entirely in inches, everywhere in the world. A shop listing says 55 inches; the alcove you want to fill is 130 centimetres wide; the two numbers refuse to talk to each other. Worse, the inch figure is a diagonal, so it tells you nothing directly about the width you have to clear.

Converting the diagonal is the first step, and this page does it in one field. The table further down then turns that diagonal into the width and height a 16:9 panel really occupies, which is the number your tape measure cares about.

An inch is exactly 2.54 cm, so cm = inches × 2.54. A 55-inch screen has a diagonal of 55 × 2.54 = 139.7 cm — but on a 16:9 panel that is only about 121.8 cm across.

Measurements Worth Converting Before You Buy

Wall and Alcove Fit

Recesses, chimney breasts and shelving gaps are measured in centimetres; the screen that has to go in them is priced in inches.

Desk Real Estate

Two 27-inch monitors side by side need roughly 120 cm of clear desk before the stands even come into it.

Getting It Through the Door

Carton dimensions are listed in centimetres by most couriers, so the diagonal has to become a box size before delivery day.

Sizing a Screen Against the Space You Have

Enter the advertised diagonal

Type the inch number from the product listing — 32, 43, 55, or a fractional one such as 15.6 for a laptop panel. The centimetre diagonal appears as you type.

Read across to width and height

Find your diagonal in the table below to see the panel's real width and height. On a 16:9 screen the width is about 87% of the diagonal and the height about 49%.

Add clearance before deciding

Allow a few centimetres for bezels, a wall bracket and cable bend radius. A width that fits the alcove to the millimetre will not fit in practice.

The opposite question — you have 130 cm of wall and want to know what size that buys — is the swap button's job. Press it, put your centimetre measurement in the top field, and read the inch equivalent underneath.

cm = inches × 2.54 • A 27-inch monitor is 27 × 2.54 = 68.58 cm corner to corner, of which about 59.8 cm is horizontal.

Diagonals Turned Into the Width and Height They Occupy

Every row assumes the 16:9 shape used by essentially all televisions and most monitors. Ultrawide and 16:10 panels are wider and shorter for the same diagonal, so treat these as the common case rather than a universal rule.

Advertised size	Diagonal	Panel width	Panel height
24 in monitor	60.96 cm	53.1 cm	29.9 cm
27 in monitor	68.58 cm	59.8 cm	33.6 cm
32 in TV	81.28 cm	70.8 cm	39.8 cm
43 in TV	109.22 cm	95.2 cm	53.5 cm
55 in TV	139.70 cm	121.8 cm	68.5 cm
65 in TV	165.10 cm	143.9 cm	80.9 cm

Diagonal In, Centimetres Out

The conversion lands as you type, so you can run through 43, 50 and 55 in a few seconds while standing in front of the wall with a tape in hand.

Reverse It to Size Up a Recess

Swap the fields when you are starting from the gap rather than the product, and a centimetre measurement comes back as the inch size to shop for.

Copy It Into a Furniture Search

Each field copies the number on its own, ready to paste into a retailer's maximum-width filter or a message to whoever is building the unit.

Drop to Millimetres for VESA Holes

Mount patterns are quoted in millimetres — 100×100, 200×200, 400×400. Search for Millimeter in the unit list and check the bracket against the panel.

Seating distance rule of thumb: for 4K content, sitting between one and one and a half times the diagonal away feels right — about 1.4 to 2.1 m from a 55-inch (139.7 cm) screen.

Questions About Screen and Display Sizes

Will a 65-inch TV sit on a 150 cm sideboard?

The panel is about 143.9 cm wide, so it clears 150 cm — but only just, and the feet matter more than the panel. Many 65-inch sets place their feet near the outer corners, which needs the full width; a centre-pedestal model is far more forgiving.

Why is my 55-inch television only 122 cm across?

Because 55 inches is measured corner to corner, not side to side. On a 16:9 rectangle the diagonal splits into a width of roughly 87% and a height of roughly 49%, giving 121.8 cm by 68.5 cm for a 139.7 cm diagonal.

Does the quoted size include the bezel?

No — the inch figure describes the active picture area only. The physical chassis is typically 1–3 cm larger in each direction on a modern thin-bezel set, and much more on an older one, so always work from the manufacturer's stated cabinet dimensions when clearance is tight.

Do phone screens measure the same way?

They use the same diagonal, but phones are much taller than 16:9 and their corners are rounded. A 6.1-inch phone has a 15.5 cm diagonal on paper while the genuinely usable rectangle is smaller, which is why two phones quoting the same number can feel different in the hand.

Are laptop screens quoted differently from monitors?

Same diagonal convention, but the shape often differs. A 13.3-inch laptop panel is 33.8 cm corner to corner; if it is 16:10 rather than 16:9 it will be taller and slightly narrower than the table above suggests, which is exactly why many people prefer that ratio for documents.