# Screen sizes

The page compares screen sizes available on eBook Readers and defines a few terms.

## Contents |

## [edit] Overview

This display size is usually given as a single number that represents the diagonal dimension of the screen. This number, however, doesn't tell the whole story. You need the height and width to really know the size of the screen.

Next to the size of the screen the next important number is related to the number of pixels on the screen. This is usually summarized as a PPI (pixels per inch) which relates screen size and screen resolution. Digital cameras use a pure total pixel count as a measure which could also be applied to a screen by multiplying the number of pixels wide by height. Modern large portable screens can now reach or exceed 5.0 MP (mega pixels) which relates directly to how big a picture they can show at full resolution.

If you are a very visual person you can use the dimensions given and a ruler to cut out paper to the exact size and then compare.

## [edit] aspect ratio

While the diagonal number is a convenient number to use for display size the important screen size is actually the area of the screen which determines the total number of letters and thus words that can appear on the page. The area is related to the diagonal size by the aspect ratio. This is a term that describes the relationship of the height of the display to the width of the display. For example a 5" screen that was 4" high and 3" wide would have a ratio of 4:3 or sometimes represented by dividing the smaller number into the larger as 1.33:1. The area of such a screen would be 12 square inches. A narrower screen would have a less reading area. For example a 5" screen with a ratio of 16:9 would be 4.35" high and 2.45" wide and have a reading area of only 10.6 square inches. Some PDAs and cell phones use a ratio of 3:2 on small pocket size devices although 4:3 is also popular.

Occasionally someone will want to fill the screen with an image by zooming it up or allowing it to be resized and wonder why there are spaces at the top and bottom or on the sides. This is caused by trying to display an image that has a different aspect ratio than the one your screen has. You need to remake the image with the correct aspect ratio or allow it to be distorted. Note that the aspect ration for an image must take into account any extraneous data that may be on the screen such as a title bar so the image may need to have a different aspect ratio than the screen itself.

The electronic displays have tended toward wider (taller) ratios which makes them less suitable to fit standard paper page size on the screen. This is particularly important for PDF books which are targeted at mimicking paper. See Paper sizes.

Comparing devices with a different aspect ratio can be difficult. The Area, the MP, and the PPI numbers can be useful to make these comparisons. For a given screen size a square screen would have the largest area while the more elongated the smaller the area will be. Area is directly related to the number of words that will fit on the screen for reading.

## [edit] 4:3 ratio

This is the ratio used on most CRT monitors and is considered pleasing to look at although for eBook readers you are likely to prefer portrait mode. It is often used with eBook readers. The computer monitors have standardize the pixel sizes for this ratio as: 640 x 480 (VGA), 800 x 600, 1024 x 768, 1280 x 1024, 1600 x 1200 and 2048 x 1536 for square pixels. Many eBook readers use one of these standard values but may have screens that are not exactly the 4:3 ratio or may use pixels that are not exactly square. Computed PPI values may be different for horizontal and vertical for these reasons and an average may be shown. This ratio is also called 1.33 to 1 or just 1.33:1. Note that the Euro standard paper is 1.4:1 and would be close to this ratio.

Size | Dimensions | Pixels | PPI | Area | Sample Device | MP |
---|---|---|---|---|---|---|

13.3" | 271 x 203 mm, 10.67" x 8.0" | 1600 × 1200 | 150 | 85.3 | Sony DPT-S1 | 1.9 |

2200 x 1650 | 207 | DASUNG | 3.6 | |||

267 x 210 mm, 10.5" x 8.27" | 86.8 | BOOX MAX2 Pro | ||||

12.9" | 264 x 198mm, 10.4" x 7.8" | 2732 x 2048 | 264 | 81 | iPad Pro | 5.6 |

10.5" | 213 x 160mm, 8.4" x 6.3" | 2224 x 1668 | 264 | 52.9 | iPad Pro 10.5" | 3.7 |

10.3" | 8.26" x 6.2" | 1872 x 1404 | 226 | 51.2 | reMarkable | 2.6 |

10.2" | 207 x 155 mm, 8.15" x 6.1" | 2560 x 1800 | 300 | 49.7 | Pixel C | 4.6 |

1280 × 1024 | 158 | E Ink display | 1.3 | |||

9.7" | 203 x 140 mm, 8.0" x 5.5" | 1600 × 1200 | 200 | 44 | 1.9 | |

2400 x 1650 | 300 | 4.0 | ||||

1200 × 825 | 150 | 1.0 | ||||

197 × 148mm, 7.8" x 5.8" | 2048 × 1536 | 264 | 45.2 | iPad Air 1&2 | 3.1 | |

1024 × 768 | 132 | iPad 1 & 2 | 0.8 | |||

9.0" | 183 × 137 mm, 7.2" × 5.4" | 1024 × 768 | 142 | 38.9 | ||

8.1" | 6.46" x 4.845" | 1024 x 768 | 158 | 31.2 | iRex iLiad | |

8.0" | 163 x 122 mm, 6.4" x 4.8" | 1600 × 1200 | 250 | 30.7 | PocketBook InkPad | 1.9 |

1024 x 768 | 160 | ICARUS Illumina XL | 0.8 | |||

7.9" | 160 x 119 mm, 6.3" x 4.7" | 1024 × 768 | 163 | 29.6 | IPad mini | |

2048 x 1576 | 326 | IPad mini retina | 3.2 | |||

7.8" | 6.24" x 4.68" | 1872 x 1404 | 300 | 29.2 | Aura ONE | 2.6 |

7.0" | 5.6" x 4.2" | 1680 x 1260 | 300 | 23.5 | Kindle Oasis 7 | 2.1 |

6.8" | 137 x 104 mm, 5.4" x 4.1" | 1440 × 1080 | 265 | 22.2 | Aura HD | 1.6 |

6.0" | 120 x 89mm, 4.7" x 3.5" | 1448 × 1072 | 300 | 16.9 | Kindle Voyage | 1.5 |

122 x 91 mm, 4.8" x 3.6" | 1024 × 768 | 213 | 17.3 | 0.8 | ||

800 × 600 | 167 | E-book Reader Matrix | 0.5 | |||

5.5" | 4.6" x 3.1" | 320 x 480 | 104 | 14.3 | eBookwise-1150 | .15 |

5.0" | 101 x 76 mm, 4.0" x 3.0" | 800 x 600 | 200 | 12 | Kobo Mini | 0.5 |

640 x 480 | 160 | jetBook | 0.3 | |||

4.3" | 88 x 66 mm, 3.46 x 2.60" | 800 x 600 | 232 | 9 | Pyrus mini | 0.5 |

3.5" | 71 x 53 mm, 2.80" x 2.10" | 320 x 240 | 114 | 5.9 | 0.1 | |

2.4" | 1.92" x 1.44" | 320 x 240 | 167 | 2.8 | Sansa Fuze | 0.1 |

## [edit] 16:9 ratio

Also known as **widescreen**, this is the standard for the new HD (High Definition) TV's and has also been used on many of the new computer screens. It is also known as 1.77:1. However computer screens are sometimes actually 16:10 (8:5) or have pixel counts that are slightly higher than would be normal for a true 16:9 screen. Specifically Android devices tend to be 8:5. True High Definition TV's are either 720p (720 x 1280 pixels) or 1080p or 1080i (1080 x 1920 pixels is sometimes called "Full HD"). A small computer screen of 800 x 480 would actually be 800 x 450 if it were true 16:9 ratio. Either the screen is slightly wider (16:9.6) or the pixels are not square to accomplish this difference. Computed PPI values may be different for horizontal and vertical for these reasons and an average may be shown.

Size | Dimensions | Pixels | PPI | Area | Sample Device | MP |
---|---|---|---|---|---|---|

12.5" | 10.9" x 6.13" | 2560 x 1440 | 236 | 66.8 | 3.7 | |

10.6" | 9.25" x 5.2" | 1920 x 1080 | 207 | 48.1 | Surface RT2 | 2.1 |

10.1" | 214 x 135 mm, 8.53" x 5.33" | 1280 x 800 | 150 | 45.5 | Motorola XOOM | 1.0 |

8.6" x 5.37" | 2560 x 1600 | 298 | 46.2 | Sony Xperia Z4 | 4.1 | |

1920 x 1200 | 223 | Lenovo Tab 4 10 Plus | 2.3 | |||

220 x 132 mm, 8.68" x 5.1" | 1024 x 600 | 118 | 44.3 | 0.6 | ||

223 x 126 mm, 8.8" x 4.95" | 1366 x 768 | 155 | 43.6 | Asus Transformer T100TA | 1.0 | |

8.9" | 7.8" x 4.4" | 2560 x 1600 | 339 | 34.3 | 4.1 | |

1920 x 1200 | 255 | 2.3 | ||||

8" | 7" x 4" | 1920 x 1200 | 280 | 28.0 | Lenovo Tab 4 8 Plus | |

7" | 155 × 89 mm, 6.1" × 3.5" | 1920 × 1200 | 323 | 21.4 | ||

1280 × 800 | 216 | PadFone X mini | 1.0 | |||

1024 × 600 | 167 | 0.6 | ||||

6.9" | 152 × 86 mm, 6.0" × 3.4" | 800 × 480 | 138 | 20.4 | 0.4 | |

5.5" | 4.8" x 2.7" | 1920 x 1080 | 401 | 13.0 | iPhone 6 plus | 2.1 |

5.2" | 4.42" x 2.49" | 960 x 540 | 217 | 11.0 | InkCase Plus | 0.52 |

5.1" | 110 × 66 mm, 4.35" × 2.62" | 800 x 480 | 184 | 11.4 | 0.4 | |

5.0" | 4.35" x 2.45" | 1920 x 1080 | 441 | 10.6 | Google Pixel 2 | 2.1 |

4.7" | 4.1" x 2.3" | 1280 x 720 | 315 | 9.4 | Fire phone | 0.9 |

1334 x 750 | 326 | iPhone 6 | 1.0 | |||

4.5" | 3.92" x 2.2" | 854 x 480 | 218 | 8.6 | PadFone X mini | 0.4 |

4.3" | 95.3 x 54 mm, 3.75" x 2.13" | 1280 x 720 | 338 | 8.0 | ||

800 x 480 | 217 | BOOX E43 | 0.38 | |||

640 x 360 | 170 | |||||

480 x 272 | 128 | Sony PSP | 0.13 | |||

4.0" | 3 7/16" x 2 1/16" | 800 x 480 | 235 | 7.1 | Nokia Lumia 520 | 0.4 |

88.9 x 49.3 mm, 3.5" x 1.94" | 1136 x 640 | 326 | 6.8 | iPhone 5 | 0.7 | |

3.5" | 3.11 x 1.73" approx | 600 x 360 | 200 | 5.3 | InkCase | 0.2 |

## [edit] 3:2 ratio

This ratio is used on some pocket sized devices such as PDAs and cell phones with screens smaller than 4" although 4:3 screens are also used on these devices. It is sometimes shown as 1.5:1 and termed wide screen. The pixels on screens with a 3:2 ratio are often not square. When compared to standard wide screen this is the equivalent of 13.5:9.

Size | Dimensions | Pixels | PPI | Area | Sample Device | MP |
---|---|---|---|---|---|---|

13.5" | 11.2" x 7.5" | 3000 x 2000 | 267 | 84.0 | Surface Book | 6.0 |

2256 x 1504 | 201 | 84.0 | Surface Laptop | 3.4 | ||

12.3" | 10.25" x 6.83" | 2736 x 1824 | 267 | 70.0 | Surface Pro 4 | 5.0 |

12.0" | 10" x 6.67" | 2160 x 1440 | 216 | 66.7 | Surface Pro 3 | 3.1 |

1920 x 1280 | 192 | HP Elite x2 | 2.5 | |||

10.8" | 9" x 6" | 1920 x 1280 | 216 | 54 | Surface 3 | 2.5 |

9.0" | 7.5" x 5" | 1920 x 1280 | 256 | 37.5 | NOOK HD 9 | |

7.0" | 5.9" x 3.7" | 1440 x 900 | 243 | 21.8 | NOOK HD 7 | 1.3 |

3.9" | 82 x 55 mm, 3.22" x 2.15" | 480 x 320 | 149 | 6.9 | Compaq iPAQ | 0.15 |

3.5" | 73.9 x 49.3 mm, 2.91" x 1.94" | 320 x 240 | 116 | 5.6 | iPhone | 0.08 |

480 x 320 | 165 | iPhone 3 | 0.15 | |||

960 x 640 | 326 | iPhone 4 | 0.6 |

## [edit] ultra wide

These are the really wide screen devices. The original ultra-wide screen is 21:9 ratio TV screen at 2560 x 1080 WQHD. The mobile devices below are a bit more portable. Ratio is shown as a value divided by 9 to permit understanding the ratios which are compared to 16:9, 4:3 is 12:9. You can also go ahead and perform the division to reference as 2.XX:1. 18:9 would be exactly 2:1. Some of these screens are radiused, meaning that the corners of the screen itself are rounded making exact rectangular equivalent diagonal sizes difficult.

Size | ratio | Dimensions | Pixels | PPI | Area | Sample Device | MP |
---|---|---|---|---|---|---|---|

6.2" | 18.5:9 | 5.61" x 2.73" | 2960 x 1440 | 527 | 15.3 | Galaxy Note8 | 4.3 |

6.0" | 18:9 | 5.35" x 2.68" | 2880 x 1440 | 538 | 14.3 | Google Pixel 2 XL | 4.1 |

5.8" | 18.5:9 | 5.24" x 2.55" (133 x 64.8mm) | 2960 x 1440 | 571 | 13.4 | Galaxy S8 | 4.3 |

19.5:9 | 5.32" x 2.46" | 2436 x 1125 | 458 | 13.1 | iPhone X | 2.7 | |

5.7" | 18:9 | 5.1" x 2.55" | 2880 x 1440 | 565 | 13.0 | LG G6 | 4.1 |

17.1:9 | 5.09" x 2.61" | 2560 x 1312 | 503 | 13.3 | Essential phone | 3.4 |

## [edit] Nomenclature

Certain sizes are considered to be standard sizes with specific names and screen resolutions. These standards are a mix of 4:3 ratio and wide screen. These include:

- QVGA (320x240)
- WQVGA (400x240)
- WQVGA432 (432x240)
- HVGA (480x320)
- VGA (640x480) NTSC standard 4:3
- nHD (640x360) 1/9 FHD, 1/4 HD
- SD and DVD: 720 x 480 NTSC and 720 x 576 PAL (video)
- WVGA800 (800x480) or simply WVGA
- WVGA854 (854x480) also known a FWVGA
- SVGA (800x600)
- qHD (960x540)
- DVGA (960x640)
- WSVGA576 (1024x576)
- WSVGA (1024x600)
- XGA (1024x768)
- WXGA720 (1280x720) also known as 720P or simply as HD (video)
- WXGA800 (1280x800)
- WXGA (1366x768) also know as FWXGA (sometimes 1360x768 to save memory)
- XGA+ (1152x864)
- WXGA+ (1440x900)
- SXGA (1280x1024)
- SXGA+ (1400x1050)
- UXGA (1600x1200)
- FHD (1920x1080) Full HD also known as 1080P (video)
- WUXGA (1920x1200)
- QXGA (2048x1536) 4x XGA the highest resolution on an analog display
- QHD (2560x1440) 4x HD also known as Quad HD video
- WQHD+ (2960x1440) also known as Quad HD+
- UHD (3840x2160) Ultra HD also known as 4K video
- UHD+ 5K (5120x2880) 2880 is the smallest number that evenly divides PAL (5) and NTSC (6)
- 8K UHD sometimes called 8K Super UHD video (7,680x4,320)

## [edit] For more information

- See eReader Screens for a comparison of the screens on various eReading devices.
- See Display for general display topics.
- https://en.wikipedia.org/wiki/Graphics_display_resolution
- http://www.displaywars.com/ put in two sizes for a comparison.