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| logo = Windows Calculator icon.png
| logo size = x64px
| screenshot = Windows 11 Calculator
| screenshot size = 200px
| caption = Calculator in [[Windows 11]]
| author = Chris Peters,<br />Mark Cliggett,<br />Marc Taylor,<br />Kraig Brockschmidt<ref>{{Cite web
| last = Juarez
| first = Seth
| date = 2016-02-09
| url = https://learn.microsoft.com/en-us/shows/seth-juarez/kraig-brockschmidt-creator-of-calc-on-early-days-microsoft
| title = Kraig Brockschmidt, Creator of Calc, on the Early Days at Microsoft
| website = Microsoft Learn
| access-date = 2024-08-11}}</ref>
| developer = [[Microsoft]]
| released = {{
| latest release version = February 2025 Update (11.2502.2.0)
| latest release date = {{sda|2025|03|24|df=y}}<ref>{{Cite web
| url = https://apps.microsoft.com/detail/9wzdncrfhvn5
| title = Windows Calculator
| website = Microsoft Apps
| access-date = 2025-03-24}}</ref>
| repo = {{URL|https://github.com/Microsoft/calculator}}
| programming language = [[C++]], [[C Sharp (programming language)|C#]]
| operating system = All versions of [[Microsoft Windows]], [[Xbox system software]],{{citation needed|date=January 2024}} [[Windows 10 Mobile]], [[Windows Phone]]
| platform = [[IA-32]], [[x86-64]]
| genre = [[Software calculator]]
| license = [[Proprietary Software]] ([[Windows 1.0]] - [[Windows 8.1]]) <br/>
[[MIT License]] ([[Windows 10]])
}}
'''Windows Calculator''' is a [[software calculator]] developed by [[Microsoft]] and included in [[Microsoft Windows|Windows]]. In its [[Windows 10]] incarnation it has four modes: standard, scientific, programmer, and a graphing mode. The standard mode includes a number pad and buttons for performing arithmetic operations. The scientific mode takes this a step further and adds exponents and trigonometric
The Windows Calculator is one of a few applications that have been bundled in all versions of Windows, starting with [[Windows 1.0]]. Since then, the calculator has been upgraded with various capabilities.
In addition, the calculator has also been included with [[Windows Phone]]<ref>{{cite web|url=https://www.drwindows.de/news/7875-windows-phone-8-1-windows-10-mobile|title=Von Windows Phone 8.1 zu Windows 10 Mobile: Eine kleine Revolution in Screenshots|date=27 October 2015|access-date=27 January 2024|language=de|publisher=Dr.Windows}}</ref> and [[Xbox One]].{{citation needed|date=January 2024}} The Microsoft Store page proclaims [[HoloLens]] support as of February 2024, but the Calculator app is not installed on HoloLens by default.
==History==
A simple arithmetic calculator was first included with [[Windows 1.0]].<ref>
[[File:Microsoft Windows NT Calculator Version 3.1 261x269.png|thumb|150px|Microsoft [[Windows NT]] Calculator Version 3.1]]▼
▲A simple arithmetic calculator was first included with [[Windows 1.0]].<ref>[http://toastytech.com/guis/win1012.html Windows 1.01 - Graphical User Interface Gallery]</ref>
In [[Windows 3.0]], a scientific mode was added, which included [[exponent]]s and [[Nth root|root]]s, [[logarithm]]s, [[factorial]]-based functions, [[trigonometry]] (supports [[radian]], [[degree (angle)|degree]] and [[gradian]]s angles), base conversions (2, 8, 10, 16), logic operations, [[statistics|statistical]] functions such as single variable statistics and linear regression.
===Windows 9x and Windows NT 4.0===
Until [[Windows 95]], it uses an [[IEEE 754-1985]] [[double-precision floating-point]], and the highest representable number by the calculator is 2<sup>1024</sup>, which is slightly above 10<sup>308</sup> (
In [[Windows 98]] and later, it uses an [[arbitrary-precision arithmetic]] library, replacing the standard [[IEEE]] [[floating point]] library.<ref>{{Cite web |url=
===Windows 2000, XP and Vista===
[[File:WindowsXPCalculator.png|thumb|150px|[[Windows XP]] Calculator]]▼
In [[Windows 2000]], [[digit grouping]] is added. Degree and base settings are added to menu bar.
<!-- Deleted image removed: [[File:Calculator Vista Scientific.png|thumb|Scientific mode in [[Windows Vista]]]] -->
<!-- Observation: Actually calculates beyond what is shown on display, but losing accuracy at some point. E.g. (10/3)-3,3333333333333333… shows further three's, but when continuing to do that, at some point, it starts to deviate into a presumably irrational number with random digits. -->
The calculators of [[Windows XP]] and [[Windows Vista|Vista]] were able to calculate using numbers beyond 10<sup>10000</sup>, but calculating with these numbers
===Windows 7===
[[File:Windows 7 Calculator.png|thumb|150px|[[Windows 7]] Calculator]]▼
In [[Windows 7]], separate programmer, statistics, unit conversion, date calculation, and worksheets modes were added. Tooltips were removed. Furthermore, Calculator's interface was revamped for the first time since its introduction. The base conversion functions were moved to the programmer mode and statistics functions were moved to the statistics mode. Switching between modes does not preserve the current number, clearing it to 0.
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| 64 bit  || −9,223,372,036,854,775,808 || 9,223,372,036,854,775,807
|}
On the right side of the main Calculator{{Clarify|reason=What does it mean by "the right side"?|date=May 2024}}, one can add a panel with date calculation, unit conversion and worksheets. Worksheets allow one to calculate a result of a chosen field based on the values of other fields. Pre-defined templates include calculating a car's fuel economy (mpg and L/100 km),<ref>[http://malektips.com/windows-7-calculate-fuel-economy.html Calculate Fuel Economy - Windows 7 (MalekTips)]</ref> a vehicle lease, and a mortgage. In pre-beta versions of Windows 7, Calculator also provided a Wages template.▼
[[File:Windows 8.1 Calculator.png|thumb|[[Windows 8.1]]'s additional Metro-style calculator in standard mode]]▼
▲On the right of the main Calculator, one can add a panel with date calculation, unit conversion and worksheets. Worksheets allow one to calculate a result of a chosen field based on the values of other fields. Pre-defined templates include calculating a car's fuel economy (mpg and L/100 km),<ref>[http://malektips.com/windows-7-calculate-fuel-economy.html Calculate Fuel Economy - Windows 7 (MalekTips)]</ref> a vehicle lease, and a mortgage. In pre-beta versions of Windows 7, Calculator also provided a Wages template.
===Windows 8.1===
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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>
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>
=== Windows 11 ===
In Windows 11, the Calculator app's user interface was modified to match the design of Windows 11 and a new settings page is present for users to toggle between the themes of
== Gallery ==
<gallery>
▲
File:Windows 7 Calculator.png|[[Windows 7]] Calculator with [[Windows Aero]]
File:Windows_8_Calculator.png|[[Windows 8]] Calculator
▲
</gallery>
==Features==
By default, Calculator runs in standard mode, which resembles a four-function calculator. More advanced functions are available in scientific mode, including [[logarithm]]s, [[numerical base]] conversions, some [[logical connective|logical operators]], [[Order of operations|operator precedence]], [[radian]], [[degree (angle)|degree]] and [[gradians]] support as well as simple single-variable [[statistical]] functions. It does not provide support for user-defined functions, [[complex number]]s, storage variables for intermediate results (other than the classic accumulator memory of pocket calculators), automated [[polar coordinates|polar]]-[[
In addition, the programming mode allows conversions between bases 16, 10, 8, and 2, the most commonly used by programmers. In this mode, the on-screen [[numeric keypad]] includes the hexadecimal digits A through F, which are active when "Hex" is selected. In hex mode, only integers are supported.
Calculator supports [[keyboard shortcut]]s; all Calculator features have an associated keyboard shortcut.<ref>{{Cite web|url = http://windows.microsoft.com/en-us/windows/keyboard-shortcuts#keyboard-shortcuts=windows-8|title = Keyboard shortcuts|access-date = 11 March 2013|website = Windows 8 Help|publisher = [[Microsoft]]}}</ref>
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==Issues==
{{
* In
* Older versions of the universal Calculator in [[Windows 10 editions#Release branches|non-LTSC editions]] of [[Windows 10]] doesn't use any regional format (can be set in Region Control Panel) that are different from the app's display language for number formatting (the app's language is English (United States) but Windows's regional format is set to a different format).<ref>{{Cite web|title=Wrong usage of Regional settings in Windows 10 Apps: weather, calculator|url=https://answers.microsoft.com/en-us/windows/forum/windows_10-other_settings-winpc/wrong-usage-of-regional-settings-in-windows-10/25db7ff1-aef5-4f3a-b958-21d843b04a74|access-date=2021-01-24|website=answers.microsoft.com|language=en-US}}</ref>
==Calculator Plus==
Calculator Plus is a separate application for [[Windows XP]] and [[Windows Server 2003]] users that adds a 'Conversion' mode over the Windows XP version of the Calculator. The 'Conversion' mode supports [[unit conversion]] and [[currency conversion]]. Currency exchange rates can be updated using the built-in update feature, which downloads exchange rates from the [[European Central Bank]].<ref>{{cite web |title=Microsoft Calculator Plus |url=https://www.tek.no/nyheter/nyhet/i/P9qax0/microsoft-calculator-plus |website=Tek.no |language=no |date=13 September 2004}}</ref><ref>{{cite web |title=Use this great maths tool for cheats! - 9Finance |url=https://finance.nine.com.au/small-business/use-this-great-maths-tool-for-cheats/cc31189d-a316-4f8a-87ce-f05a37887f65 |website=finance.nine.com.au|date=June 2024 }}</ref>
==See also==
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* [[Formula calculator]]
* [[List of formerly proprietary software]]
* [[Microsoft
* [[Power Calculator]]
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* [https://github.com/Microsoft/calculator Source code on GitHub]
* [https://web.archive.org/web/20090316031019/http://www.microsoft.com/downloads/details.aspx?FamilyID=32b0d059-b53a-4dc9-8265-da47f157c091&displaylang=en Microsoft Calculator Plus]
* [https://sourceforge.net/projects/reactos-calc/ ReactOS Calc]
{{Microsoft FOSS}}
{{Windows Components}}
{{Calculator navbox}}
[[Category:1985 software]]
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