# Windows Calculator MCP Server

> Use this tool when you need to perform accurate mathematical calculations within Claude Desktop, leveraging Windows' native PowerShell calculation engine through a seamless connection to Windows Calculator. It solves problems requiring reliable and precise computations, such as scientific or financial calculations. The tool accepts mathematical expressions as input and returns calculated results as output, ideal for use cases where precision and reliability are crucial.

Canonical page: https://skillsregistry.net/skills/rspeciale0519-wincalcmcp  
JSON: https://api.skillsregistry.net/v1/skills/rspeciale0519-wincalcmcp

## Description

Connects Claude Desktop to Windows Calculator, enabling accurate mathematical calculations using Windows' native PowerShell calculation engine.

## Trust

- **Trust score (0–1):** 0.70
- **Verification tier:** verified
- **Last scanned:** 2026-09-01

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-09-01

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/u05yj72y7r)
- **Repository:** <https://github.com/rspeciale0519/WinCalcMCP>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "rspeciale0519-wincalcmcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/rspeciale0519-wincalcmcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/rspeciale0519-wincalcmcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt