What are SP and DP in Android and How to Calculate the Resolution of a Device in DP

How to Calculate the Resolution of a Device in DP


Suppose, a seven inch android device have the density 213 dpi and the screen resolution in pixels is 1280 * 800 then to calculate the resolution in dp, apply following formula.

px/dp = dpi/160dpi
dp = px * 160dpi/dpi
dp = 1280 * 160 * 213
dp = 961.50

Again,

dp = px * 160dpi/dpi
dp = 800 * 160 * 213
dp = 600.93

The screen resolution of device in dp is 961.50 by 600.93
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