Screen size calculator
How wide and how tall is the screen?
A screen is sold by its diagonal, but a wall, a counter or an alcove is measured in width and height. Enter the diagonal to get both, or enter your space to find the largest size that fits.
Every common size, 16:9
The lit picture of each size, in landscape. Turn the two numbers round for portrait. Each size has its own page with reading distances, pixel sizes, video wall sizes and a drawing to scale.
| Diagonal | Width x height, inches | Width x height, cm | Width x height, mm | Picture area |
|---|---|---|---|---|
| 7 in (17.8 cm) | 6.1 x 3.4 in | 15.5 x 8.7 cm | 155 x 87 mm | 0.15 sq ft |
| 8 in (20.3 cm) | 7.0 x 3.9 in | 17.7 x 10.0 cm | 177 x 100 mm | 0.19 sq ft |
| 10.1 in (25.7 cm) | 8.8 x 5.0 in | 22.4 x 12.6 cm | 224 x 126 mm | 0.30 sq ft |
| 11.6 in (29.5 cm) | 10.1 x 5.7 in | 25.7 x 14.4 cm | 257 x 144 mm | 0.40 sq ft |
| 13.3 in (33.8 cm) | 11.6 x 6.5 in | 29.4 x 16.6 cm | 294 x 166 mm | 0.52 sq ft |
| 14 in (35.6 cm) | 12.2 x 6.9 in | 31.0 x 17.4 cm | 310 x 174 mm | 0.58 sq ft |
| 15.6 in (39.6 cm) | 13.6 x 7.6 in | 34.5 x 19.4 cm | 345 x 194 mm | 0.72 sq ft |
| 17.3 in (43.9 cm) | 15.1 x 8.5 in | 38.3 x 21.5 cm | 383 x 215 mm | 0.89 sq ft |
| 18.5 in (47.0 cm) | 16.1 x 9.1 in | 41.0 x 23.0 cm | 410 x 230 mm | 1.0 sq ft |
| 19 in (48.3 cm) | 16.6 x 9.3 in | 42.1 x 23.7 cm | 421 x 237 mm | 1.1 sq ft |
| 21.5 in (54.6 cm) | 18.7 x 10.5 in | 47.6 x 26.8 cm | 476 x 268 mm | 1.4 sq ft |
| 22 in (55.9 cm) | 19.2 x 10.8 in | 48.7 x 27.4 cm | 487 x 274 mm | 1.4 sq ft |
| 23.8 in (60.5 cm) | 20.7 x 11.7 in | 52.7 x 29.6 cm | 527 x 296 mm | 1.7 sq ft |
| 24 in (61.0 cm) | 20.9 x 11.8 in | 53.1 x 29.9 cm | 531 x 299 mm | 1.7 sq ft |
| 27 in (68.6 cm) | 23.5 x 13.2 in | 59.8 x 33.6 cm | 598 x 336 mm | 2.2 sq ft |
| 32 in (81.3 cm) | 27.9 x 15.7 in | 70.8 x 39.8 cm | 708 x 398 mm | 3.0 sq ft |
| 40 in (101.6 cm) | 34.9 x 19.6 in | 88.6 x 49.8 cm | 886 x 498 mm | 4.7 sq ft |
| 42 in (106.7 cm) | 36.6 x 20.6 in | 93.0 x 52.3 cm | 930 x 523 mm | 5.2 sq ft |
| 43 in (109.2 cm) | 37.5 x 21.1 in | 95.2 x 53.5 cm | 952 x 535 mm | 5.5 sq ft |
| 48 in (121.9 cm) | 41.8 x 23.5 in | 106.3 x 59.8 cm | 1063 x 598 mm | 6.8 sq ft |
| 49 in (124.5 cm) | 42.7 x 24.0 in | 108.5 x 61.0 cm | 1085 x 610 mm | 7.1 sq ft |
| 50 in (127.0 cm) | 43.6 x 24.5 in | 110.7 x 62.3 cm | 1107 x 623 mm | 7.4 sq ft |
| 55 in (139.7 cm) | 47.9 x 27.0 in | 121.8 x 68.5 cm | 1218 x 685 mm | 9.0 sq ft |
| 58 in (147.3 cm) | 50.6 x 28.4 in | 128.4 x 72.2 cm | 1284 x 722 mm | 10.0 sq ft |
| 60 in (152.4 cm) | 52.3 x 29.4 in | 132.8 x 74.7 cm | 1328 x 747 mm | 10.7 sq ft |
| 65 in (165.1 cm) | 56.7 x 31.9 in | 143.9 x 80.9 cm | 1439 x 809 mm | 12.5 sq ft |
| 70 in (177.8 cm) | 61.0 x 34.3 in | 155.0 x 87.2 cm | 1550 x 872 mm | 14.5 sq ft |
| 75 in (190.5 cm) | 65.4 x 36.8 in | 166.0 x 93.4 cm | 1660 x 934 mm | 16.7 sq ft |
| 77 in (195.6 cm) | 67.1 x 37.8 in | 170.5 x 95.9 cm | 1705 x 959 mm | 17.6 sq ft |
| 80 in (203.2 cm) | 69.7 x 39.2 in | 177.1 x 99.6 cm | 1771 x 996 mm | 19.0 sq ft |
| 83 in (210.8 cm) | 72.3 x 40.7 in | 183.7 x 103.4 cm | 1837 x 1034 mm | 20.4 sq ft |
| 85 in (215.9 cm) | 74.1 x 41.7 in | 188.2 x 105.8 cm | 1882 x 1058 mm | 21.4 sq ft |
| 86 in (218.4 cm) | 75.0 x 42.2 in | 190.4 x 107.1 cm | 1904 x 1071 mm | 21.9 sq ft |
| 98 in (248.9 cm) | 85.4 x 48.0 in | 217.0 x 122.0 cm | 2170 x 1220 mm | 28.5 sq ft |
| 100 in (254.0 cm) | 87.2 x 49.0 in | 221.4 x 124.5 cm | 2214 x 1245 mm | 29.7 sq ft |
| 110 in (279.4 cm) | 95.9 x 53.9 in | 243.5 x 137.0 cm | 2435 x 1370 mm | 35.9 sq ft |
Worked from the diagonal and the shape, so these are the lit picture only. The outside of a cabinet is larger by the width of its frame, and a real panel can differ by a few millimetres. Use the drawing of the exact model before you cut a hole or build a recess.
Compare two sizes
Each comparison draws both screens to scale on one centre and gives the difference in width, height and picture area.
10.1 vs 13.3 inch13.3 vs 15.6 inch15.6 vs 17.3 inch21.5 vs 24 inch24 vs 27 inch27 vs 32 inch32 vs 40 inch32 vs 43 inch40 vs 43 inch42 vs 43 inch43 vs 48 inch43 vs 50 inch43 vs 55 inch48 vs 55 inch50 vs 55 inch50 vs 65 inch55 vs 60 inch55 vs 65 inch55 vs 75 inch60 vs 65 inch65 vs 70 inch65 vs 75 inch65 vs 77 inch65 vs 85 inch70 vs 75 inch75 vs 77 inch75 vs 85 inch75 vs 86 inch77 vs 83 inch83 vs 85 inch85 vs 98 inch86 vs 98 inch98 vs 110 inch
How we work it out
The diagonal, the width and the height make a right-angled triangle. For a shape of 16 to 9, the diagonal is the square root of 16 squared plus 9 squared, about 18.36 parts. So the width is the diagonal times 16 divided by 18.36, and the height is the diagonal times 9 divided by 18.36.
In round numbers, a 16:9 screen is 87 percent of its diagonal wide and 49 percent of its diagonal high. Picture area grows with the square of the diagonal, so a 55-inch screen has about 64 percent more picture than a 43-inch one.
What to do with the answer
Leave room for the frame, the bracket and the cables. The frame allowance in the calculator is a guess until you have the drawing for the model, so check that drawing before you commit to a tight space.
Size is only half of the choice. The viewing distance calculator shows whether people can read your words from where they stand, the meeting room calculator sizes a screen for people who sit and read, and the display range has the outline, cut-out and mounting drawing for each model.