# microsoft/calculator

Windows Calculator: A simple yet powerful calculator that ships with Windows

Repository: https://github.com/microsoft/calculator
Canonical: https://ross.abutalabs.com/products/calculator
Language: C#
License: MIT
License Family: permissive
Topics: uwp, windows, windows-10, xaml, cpp, csharp, windows-11
Last push: 2026-08-25T23:34:32+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2774, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 31025, forks 5778 (observed 2026-08-28T04:11:56.556646+00:00)

## What it is
The Windows Calculator app, a pre-installed UWP application written in C++ and C# offering standard, scientific, and programmer calculator modes plus unit and currency converters. It is the official open-source repository for the calculator that ships with Windows 10 and 11.

## Use cases
- perform basic and scientific calculations on windows
- convert between units of measurement
- convert currencies with live rates
- programmer base conversions like hex to binary
- calculate date differences and add days to a date
- contribute to or study the windows calculator source code

## When to choose
- you need the official calculator that ships with windows
- you want arbitrary-precision basic arithmetic
- you are a windows developer wanting to contribute or study a real UWP app

## When to avoid
- you need a calculator on linux or macos
- you need a scriptable or command-line calculator
- you need a cross-platform calculator library to embed in your own app

## Facets
- artifact type: application
- maturity: active
- function: gui, math
- domain: developer-tools, windows
- platform: windows
- tags: calculator, uwp, unit-converter, currency-conversion, scientific-calculator, programmer-calculator, arbitrary-precision, desktop

## Member repositories
- microsoft/calculator (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:56.556646+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:52:20.030435+00:00, confidence not recorded.
  - readme: https://github.com/microsoft/calculator (fetched 2026-08-28T04:11:56.556646+00:00, sha 7d283426be63)
- Data as of 2026-08-30T08:39:29.467469+00:00.