# O le calculator o le pixel density

### O le a le pixel density

Pixels per inch (PPI) o le fuaina o le pixel density (iugafono) o masini i tulaga eseese: e masani lava faʻaali komepiuta, faʻataʻitaʻi ata, ma ata puʻeina ata ata. O le PPI o se faʻaaliga komepiuta e fesoʻotaʻi ma le tele o le faʻaaliga i inisi ma le aofaʻi o numera o pika i le itu faʻataʻotoʻi ma faʻatonuga itu.

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### Sili atu luga o pixel density

Afai e te manaʻo e fuafua le pixel density o lau pupuni, e tatau ona e iloa: faalava ma le faʻasolo o le pixel faitauga ma lau diagonal lau tele. Ona faʻaoga lea o lenei metotia, pe faʻaaoga la matou calculator;)

$$d_p = \sqrt{w^2 + h^2}$$ $$PPI = \dfrac{d_p}{d_i} \ \$$ where

 $$w$$ o le lautele lautele i totonu o pixel $$h$$ o maualuga maualuga i totonu o pixel $$d_p$$ o le diagonal iugafono i pixel $$d_i$$ o le diagonal tele i inisi (o le numera lenei faʻasalalau e pei o le tele o le faʻaaliga)

A e manaʻo e fia iloa atili, siaki le ata video lea e uiga i le Linus Tips i lalo.

### Faʻaleleia atili faʻasolopito ole PPI (lisi o masini)

#### Telefoni feaveaʻi

Igoa ole masini Pixel density (PPI) Faʻaalia le iʻuga Lautele faʻaali atu (inisi) Tausaga faʻalauiloaina Sootaga
Motorola Razr V3 128 176 x 220 2.2 2004
iPhone (first gen.) 128 320 x 480 3.5 2007
iPhone 4 326 960 x 640 3.5 2010
Samsung Galaxy S4 441 1080 x 1920 5 2013
HTC One 486 1080 x 1920 4.7 2013
LG G3 534 1140 x 2560 5.5 2014

#### Laulau

Igoa ole masini Pixel density (PPI) Faʻaalia le iʻuga Lautele faʻaali atu (inisi) Tausaga faʻalauiloaina Sootaga
iPad (first gen.) 132 1024 x 768 9.7 2010
iPad Air (also 3rd & 4th gen.) 264 2048 x 1536 9.7 2012
Samsung Galaxy Tab S 288 2560 x 1600 10.5 2014
iPad mini 2 326 2048 x 1536 7.9 2013
Samsung Galaxy Tab S 8.4 359 1600 x 2560 8.4 2014

#### Faʻaalia komepiuta

Igoa ole masini Pixel density (PPI) Faʻaalia le iʻuga Lautele faʻaali atu (inisi) Tausaga faʻalauiloaina Sootaga
Commodore 1936 ARL 91 1024 x 768 14 1990
Dell E773C 96 1280 x 1024 17 1999
Dell U2412M 94 1920 x 1200 24 2011
Asus VE228DE 100 1920 x 1080 27 2011
Apple Thunderbolt Display 108 2560 x 1440 27 2011
Dell UP2414Q UltraSharp 4K 183 3840 x 2160 24 2014