Calculator for Memory / Bits/ Bytes Size like numerical calculator

Question

Can you please recommend any software / tool (for Windows 7 and Android) for memory sizes calculation (Bits / Bytes) like numerical calculator. For eg. input 12.5 GB + 5.8 MB + 1392 KB then click on Calculate button it should show the result.

Answer 1

Google or WolframAlpha

Although both websites require an Internet connection, it's as simple as it probably can get as far as the input method is concerned:

1. Open Google or WolframAlpha in a web browser.
   WolframAlpha has also got an app.
   
   
2. Enter 12.5 GB + 5.8 MB + 1392 KB.
   Optionally provide the desired output unit: 12.5 GB + 5.8 MB + 1392 KB in MB

Answer 2

In Windows PowerShell already has that capability. Numbers can take suffixes that represent the units in base 2. Just type 12.5GB + 5.8MB + 1392KB and you'll have the size in bytes. To convert to other units divide by the corresponding unit

If you need to use decimal units then scale the values manually: 12.5e9 + 5.8e6 + 1392e3 (G = 1e9, M = 1e6, K = 1e3)