Calculators
5 free tools
Not every phone question needs a sensor, some just need quick math done right. This category collects the small conversions and calculators that come up when comparing devices or planning storage: convert storage units between GB, GiB, MB and bytes, work out screen PPI and Android density from resolution and size, reduce an aspect ratio, estimate download time, and generate a strong random password.
Each calculator runs instantly in your browser with no sign-up and no data leaving your device. They are handy for buyers comparing specs, developers checking density buckets, and anyone who wants a fast answer without opening a spreadsheet.
DPI/PPI Calculator
Calculate the pixel density (PPI) of a screen from its resolution and size, with the Android density class.
Open toolBattery Health
Calculate your Android battery health by comparing current capacity with factory capacity, and know when to replace it.
Open toolStorage Converter
Convert between bytes, KB, MB, GB and TB using the binary standard Android uses.
Open toolDownload Time
Calculate how long a file takes to download from its size and your internet speed.
Open toolAspect Ratio
Find the aspect ratio (16:9, 20:9...) and total pixel count from a screen resolution.
Open tool