TV Size Calculator
Enter your TV's diagonal size in inches to get the width and height in centimetres.
Last updated: April 2026
Common sizes — click for full dimensions guide:
| Measurement | Centimetres | Inches |
|---|---|---|
| Width | 114.6 cm | 45.1 in |
| Height | 64.5 cm | 25.4 in |
| Diagonal | 132.1 cm | 52.0 in |
Screen dimensions only. Add 2–5 cm per side for the bezel.
Browse by TV size
Select a size for a dedicated page with exact dimensions, a comparison table, and viewing distance guide.
| Size | Width | Height | Diagonal (cm) | Min distance |
|---|---|---|---|---|
| 32 inch TV | 70.8 cm | 39.8 cm | 81.3 cm | 1.2 m |
| 43 inch TV | 95.2 cm | 53.5 cm | 109.2 cm | 1.6 m |
| 50 inch TV | 110.7 cm | 62.3 cm | 127.0 cm | 1.9 m |
| 55 inch TV | 121.7 cm | 68.5 cm | 139.7 cm | 2.1 m |
| 65 inch TV | 143.9 cm | 80.9 cm | 165.1 cm | 2.5 m |
| 75 inch TV | 166.0 cm | 93.4 cm | 190.5 cm | 2.9 m |
| 85 inch TV | 188.2 cm | 105.8 cm | 215.9 cm | 3.2 m |
Popular comparisons
TV sizes in centimetres
| Screen diagonal (cm) | Inches equivalent |
|---|---|
| 81 cm TV | 32″ |
| 109 cm TV | 43″ |
| 127 cm TV | 50″ |
| 132 cm TV | 52″ |
| 140 cm TV | 55″ |
| 165 cm TV | 65″ |
| 190 cm TV | 75″ |
| 216 cm TV | 85″ |
TV size guides
- TV size comparison chart — all dimensions 32–98 inches in one table
- Viewing distance guide — how far to sit from any TV size
- Room size guide — which TV fits your room
- Wall mount guide — height, brackets and VESA sizing
The diagonal inch number tells you almost nothing useful on its own. A 65″ TV on a wall 2 metres away is overwhelming; the same TV in a 5-metre living room looks undersized. What matters is the physical width relative to your wall, and the distance between the screen and where you sit.
Recommended viewing distances
Based on a 16:9 screen and standard viewing comfort guidelines (1.5× to 2.5× the screen diagonal). The closer end suits 4K content; the farther end suits HD.
| TV size | Recommended distance | Minimum (4K) | Maximum (HD) |
|---|---|---|---|
| 32″ | 1.2–1.6 m | 1.2 m | 1.6 m |
| 43″ | 1.6–2.2 m | 1.6 m | 2.2 m |
| 50″ | 1.9–2.5 m | 1.9 m | 2.5 m |
| 55″ | 2.1–2.8 m | 2.1 m | 2.8 m |
| 65″ | 2.4–3.3 m | 2.4 m | 3.3 m |
| 75″ | 2.8–3.8 m | 2.8 m | 3.8 m |
| 85″ | 3.2–4.3 m | 3.2 m | 4.3 m |
When do you need this?
- Checking whether a TV fits a specific shelf, alcove, or TV unit before buying
- Working out whether your sofa distance is comfortable for a given screen size
- Replacing an old TV and needing to know if the new one fits the existing mount or bracket
- Converting a TV listed in inches on a foreign retailer's site to centimetres
- Comparing two different TV sizes when the box only shows the diagonal
- Planning a home cinema and matching screen size to projector throw distance
Quick reference
- Width (cm) = diagonal (in) × 2.54 × 16 ÷ √(16² + 9²) ≈ diagonal × 2.209
- Height (cm) = diagonal (in) × 2.54 × 9 ÷ √(16² + 9²) ≈ diagonal × 1.243
- Diagonal (cm) = diagonal (in) × 2.54 exactly
- Shortcut: multiply inches by 2.21 for width, 1.24 for height
- Min viewing distance ≈ diagonal (cm) × 1.5 ÷ 100 metres
- Max viewing distance ≈ diagonal (cm) × 2.5 ÷ 100 metres
Understanding TV measurements
Diagonal inches
The advertised number — always the screen diagonal in inches, never including the bezel or stand. Manufacturers settled on diagonal measurement in the early days of television because it gives the highest single number for a given screen area. A 55″ TV is 55 inches from one corner of the screen to the opposite corner.
Physical width and height
These are the numbers you actually need for placement. A 55″ TV is roughly 122 cm wide and 69 cm tall — but that's screen only. The full product width including bezel is typically 4–10 cm wider. Check the manufacturer's spec sheet for exact product dimensions before ordering furniture or a wall bracket.
Aspect ratio
All modern consumer TVs use 16:9 (widescreen). This fixed ratio is why the diagonal alone determines both width and height — there's only one possible rectangle. If you encounter a 4:3 TV (older CRT sets), the proportions are very different; those ratios are not covered here.
Common mistakes
- Using the diagonal as the width. A 55″ TV is not 55 inches wide — it's about 48 inches (122 cm) wide. Many people underestimate how wide the physical unit is.
- Forgetting the bezel. The screen dimensions from the calculator are the panel only. The full product is 2–5 cm wider and taller per side depending on the model.
- Ignoring the stand footprint. Some stands are very wide — extending close to the full product width — while others are narrow centre pedestals. The stand affects required shelf depth and width.
- Sitting too close. Buying a 75″ TV for a room with a 2-metre viewing distance creates an uncomfortably large field of view. Use the distance table above to check fit before purchasing.
- Comparing different brands by diagonal alone. Bezels vary. A 55″ Samsung and a 55″ LG have the same screen size but slightly different physical dimensions. Always compare spec sheets for wall-mounting or tight-fit installation.
Which size should you choose?
Viewing distance under 2 m (bedroom, small living room): 32–43″ is comfortable. Larger sizes will feel too close and tiring to watch.
Viewing distance 2–3 m (typical living room): 50–65″ is the sweet spot. A 55″ TV at 2.5 m is a well-balanced setup for both HD and 4K content.
Viewing distance over 3 m (open-plan room, home cinema): 65–85″ or larger. At 4 m, a 65″ TV starts to feel small; 75–85″ fills the field of view properly.
Wall space is the hard constraint. Always measure the horizontal space available and compare against the physical width — not the diagonal — before deciding.
Frequently asked questions
How is TV size measured?
TV size is the diagonal of the screen panel in inches — not including the bezel. A 52″ TV has a screen diagonal of 132 cm. Manufacturers have used the diagonal measurement since the early days of television because it produces the largest-sounding number for a given screen area. The actual width and height depend on the aspect ratio — virtually all modern TVs use 16:9, so the calculator above applies to any current model.
What are the exact dimensions of a 55″ TV?
A standard 16:9 TV at 55″ is approximately 121.8 cm wide and 68.6 cm tall (screen only). The full unit — including the bezel frame — is typically 2–5 cm wider and taller per side depending on the model. For wall mounting, always check the manufacturer's spec sheet for the VESA hole pattern and total unit dimensions, not just the screen size. A 55″ TV generally needs about 130–135 cm of horizontal space on a shelf or wall.
How far should I sit from a 55 inch TV?
For a 55 inch TV the recommended viewing distance is 2.1 to 2.8 metres. For 4K content you can comfortably sit at the closer end — the high pixel density means no visible pixelation even up close. For HD content, 2.5 metres is a safe middle ground. The main thing to avoid is sitting so close that your eyes have to scan across the screen to follow action.
Does the advertised TV size include the stand?
No. The advertised size is always the screen diagonal only, measured without the bezel. For furniture and shelf planning you need the total product dimensions, which include the stand or feet. These vary significantly between models — some stands are wide and flat, others are narrow and tall. Always check the manufacturer's spec sheet before buying furniture to fit a specific TV.
What TV size is right for my room?
Measure your viewing distance in metres, then multiply by 40 to get the minimum recommended screen size in inches, or multiply by 67 for the maximum. A 3-metre sofa distance suggests a TV between 48″ and 65″. If you're watching 4K content you can go towards the larger end of that range; for HD-only sources, stay towards the smaller end.
Why are TVs measured in inches and not centimetres?
TV sizing in inches is a legacy of the American consumer electronics industry, which dominated the global market in the mid-20th century. Early US manufacturers standardised on inches, and the measurement became embedded in marketing, retail, and consumer expectations worldwide — even in countries that otherwise use metric for everything else. Attempts to switch to centimetres have not gained traction because the industry and consumers are too accustomed to inch-based sizes. A 55″ TV is universally understood; 140 cm is not.
Related tools
- Length converter — convert between inches, centimetres, feet, and metres
- 55 inch TV dimensions — dedicated page with comparison table and room fit guide
- 65 inch TV dimensions — the most popular large-screen size explained
- 140 cm TV in inches — convert a cm-listed TV back to inches