A 40″ TV is 88.6 cm wide and 49.8 cm tall (screen only, 16:9).
A 40-inch TV has a screen diagonal of 101.6 cm. It sits between the compact 32-inch and the more popular 43-inch, making it a solid fit for bedrooms, kitchens, and smaller living rooms. The 88.6 cm width slots comfortably onto most standard bedroom furniture and TV units without dominating the space.
The dimensions above are for the screen only. Add 3–5 cm per side for the bezel when planning shelf or wall space. Always check the manufacturer's spec sheet for exact product dimensions if you are fitting the TV inside furniture or installing a wall bracket.
Use the calculator below to verify dimensions for any size, or compare with adjacent sizes in the table.
Common sizes:
| Measurement | Centimetres | Inches |
|---|---|---|
| Width | 88.6 cm | 34.9 in |
| Height | 49.8 cm | 19.6 in |
| Diagonal | 101.6 cm | 40.0 in |
Screen dimensions only. Add 2–5 cm per side for the bezel.
| Size (inches) | Diagonal (cm) | Width (cm) | Height (cm) | Min distance |
|---|---|---|---|---|
| 32″ | 81.3 cm | 70.8 cm | 39.9 cm | 1.2 m |
| 40″ | 101.6 cm | 88.6 cm | 49.8 cm | 1.5 m |
| 43″ | 109.2 cm | 95.2 cm | 53.5 cm | 1.6 m |
| 50″ | 127.0 cm | 110.7 cm | 62.3 cm | 1.9 m |
| 55″ | 139.7 cm | 121.7 cm | 68.5 cm | 2.1 m |
A 40 inch TV with a 16:9 aspect ratio is 88.6 cm wide and 49.8 cm tall, measured screen only. These figures come from the diagonal measurement (101.6 cm) and the 16:9 width-to-height ratio. The full unit — including the plastic or metal bezel — is typically 91–95 cm wide depending on the model. Always check the manufacturer's specification sheet for exact product dimensions before planning shelf or wall space.
The recommended viewing distance for a 40 inch TV is between 1.5 m and 2.5 m. This range is based on the standard guideline of 1.5× to 2.5× the screen diagonal (101.6 cm). For 4K Ultra HD content you can comfortably sit at 1.5 m — the high pixel density prevents visible pixelation at close range. For HD content, 1.8–2.0 m is a comfortable standard distance. A 40-inch TV at more than 3 metres may feel small; consider a 50 or 55 inch instead.
40 inches equals 101.6 cm. This is the diagonal measurement of the screen panel — the standard way all TV sizes are quoted. The width of a 40-inch 16:9 TV is 88.6 cm (34.9 inches) and the height is 49.8 cm (19.6 inches). To convert any TV size from inches to cm, multiply by 2.54. For example, 40 × 2.54 = 101.6 cm.
A 40 inch TV is a popular choice for bedrooms and smaller living rooms where you sit 1.5–2.5 metres from the screen. Its 88.6 cm width fits comfortably on most bedroom dressers, TV units, and wall brackets without overwhelming the space. If your bedroom is larger or you sit further than 2.5 metres away, a 43 or 50 inch TV will fill your field of view better. For small bedrooms viewed from under 1.5 metres, a 32-inch may be more comfortable.