Where do you get this number?<p>In the store (<a href="https:&#x2F;&#x2F;www.microsoft.com&#x2F;en-us&#x2F;store&#x2F;apps&#x2F;windows-calculator&#x2F;9wzdncrfhvn5#app-details" rel="nofollow">https:&#x2F;&#x2F;www.microsoft.com&#x2F;en-us&#x2F;store&#x2F;apps&#x2F;windows-calculato...</a> ) it says &quot;Approximate size 3.07 MB - 5.79 MB&quot;, on my installation it says &quot;368 KB&quot; in the settings app and all &quot;%ProgramFiles%\WindowsApps\Microsoft.WindowsCalculator*&quot; directories are about 5 megabytes together.<p>RAM usage exceeds 47 megabytes with about 5 or 6 calculator windows open.