How to calculate the view’s height or length for adaptation device

1

let’me see ,some times we use the px on my page denotation the height or length

but we know on Android divece the px not popular .How to calculate the view’s height or length on device’realy values?

eg: my page On Google Chrome browser ,the tabs h is 100px , actually ,I want it display on device is 100px .

image
p1.png1593×775 166 KB
t

but
Android_device_capture_screen (Device display is 2048 x 1536 pixels) the display is 166 px

image
p2.png510×683 15 KB

**Css **

.tabs {
    
    height: 100px;  // 


}

How to calculate this value ?

this code on github https://github.com/longtaoge/ScreenFit/tree/master