Calculator + chartEnter your measurements below and it works the answer out.
A TV is measured diagonally, corner to corner across the screen only, not the frame. A "55-inch" TV is about 48 inches wide and 27 inches tall. Enter a diagonal to get width and height, or enter the width you measured to find the size.
| Size (diagonal) | Screen width | Screen height | Typical overall width |
|---|---|---|---|
| 32 in | 27.9 in | 15.7 in | 28.7–29.5 in |
| 43 in | 37.5 in | 21.1 in | 38.3–39.5 in |
| 50 in | 43.6 in | 24.5 in | 44.4–45.5 in |
| 55 in | 47.9 in | 27.0 in | 48.7–49.5 in |
| 65 in | 56.7 in | 31.9 in | 57.5–58.5 in |
| 75 in | 65.4 in | 36.8 in | 66.2–67.5 in |
| 85 in | 74.1 in | 41.7 in | 75–76.5 in |
Screen figures are exact for 16:9. Overall width depends on the frame; measure the TV you are buying for a tight cabinet.
Every modern TV is 16:9, so width = diagonal × 0.8716 and height = diagonal × 0.4903. The calculator applies those and, for a cabinet or wall bracket, adds the frame on each side.
From a measurement to a size: diagonal = width ÷ 0.8716, or height ÷ 0.4903, then rounded to the nearest size that is sold (32, 40, 43, 50, 55, 65, 75, 85).
Measuring the diagonal yourself: from the top-left corner of the picture to the bottom-right corner of the picture, tape held flat against the glass. Do not include the frame — that is why a measured TV usually comes out half an inch under its advertised size.
Diagonally, corner to corner across the screen, not including the frame. A tape from the top-left corner of the picture to the bottom-right corner gives the size class.
The screen is 47.9 inches wide and 27 inches tall. With the frame, most 55-inch TVs are 48.5 to 49.5 inches wide.
The screen. The advertised size is the picture diagonal, and it is often rounded — a "65-inch" TV may measure 64.5 inches.
Measure the stand width, subtract at least 2 inches, and use the overall-width column above; a TV can overhang a stand, but its feet must sit on it.