Editing Windows Calculator (section)

===Windows 10===
The Calculator in [[Windows 10 editions#Release branches|non-LTSC editions]] of [[Windows 10]] is a [[Universal Windows Platform app]]. In contrast, Windows 10 LTSC (which does not include universal Windows apps) includes the traditional calculator, but which is now named {{code|win32calc.exe}}. Both calculators provide the features of the traditional calculator included with Windows 7 and Windows 8.x, such as unit conversions for volume, length, weight, temperature, energy, area, speed, time, power, data, pressure and angle, and the history list which the user can clear.

Both the universal Windows app and LTSC's {{code|win32calc.exe}} register themselves with the system as handlers of a '{{code|calculator:}}' pseudo-protocol.<!-- i.e. both register a programmatic identifier (ProgID) and link to it from their respective 'Capabilities\URLAssociations' registrations (which in turn are pointed to from the {user|machine}\Software\RegisteredApplications registries).--> This registration is similar to that performed by any other well-behaved application when it registers itself as a handler for a filetype (e.g. {{code|.jpg}}) or protocol (e.g. {{code|http:}}).

All Windows 10 editions (both LTSC and non-LTSC) continue to have a {{code|calc.exe}}, which however is just a stub that launches (via ShellExecute) the handler that is associated with the '{{code|calculator:}}' pseudo-protocol. As with any other protocol or filetype, when there are multiple handlers to choose from, users are free to choose which handler they prefer{{mdash}} either via the classic control panel ('Default programs' settings) or the immersive UI settings ('Default Apps' settings) or from the command prompt via {{code|OpenWith calculator:}}.

In the Windows 10 Fall Creators Update, a currency converter mode was added to Calculator.<ref>{{Cite web |last1=Blog |first1=Windows Experience |last2=Pidgeon |first2=Elana |date=2017-12-28 |title=Windows 10 Tip: Travel easier with the built-in currency converter |url=https://blogs.windows.com/windowsexperience/2017/12/28/windows-10-tip-travel-easier-built-currency-converter/ |access-date=2024-08-04 |website=Windows Experience Blog |language=en-US}}</ref>

On 6 March 2019, Microsoft released the [[source code]] for Calculator on [[GitHub]] under the [[MIT License]].<ref>{{Cite web|url=https://www.zdnet.com/article/microsoft-is-open-sourcing-windows-calculator-on-github/|title=Microsoft is open-sourcing Windows Calculator on GitHub|last=Foley|first=Mary Jo|author-link=Mary Jo Foley|date=6 March 2019|website=ZDNet|access-date=6 March 2019}}</ref>