How do I specify reactant amounts?

Provide the reactant amounts as a JSON array of objects, where each object contains the formula and the mass in grams, such as `[{ "formula": "H2", "amount": 4 }]`.

What happens if my equation is unbalanced?

The `validate_equation_and_masses` tool will detect if the equation is unbalanced and return an error reason.

Can I calculate the percent yield?

Yes, you can use the `calculate_percent_yield` tool by providing the equation, reactant amounts, the actual yield mass, and the target product formula.

Stoichiometry Calculator MCP Connector for Claude

A+

Perform precise chemical stoichiometry calculations including limiting reagents and theoretical yields.

4 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides a precision calculation engine for chemical stoichiometry. It allows AI agents to analyze balanced chemical equations to determine the limiting reagent, calculate the amount of excess reagents remaining, and find the theoretical yield of specific products. Users can also evaluate reaction efficiency by comparing actual yields to theoretical limits using the calculate_percent_yield tool. It is designed to handle molar mass calculations and stoichiometric ratios automatically.

chemistrystoichiometrysciencemolar-massyield-calculation

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_xWsuANB0VyqxoT7uCs4CZE1OJqGmT5chF3qcT0ow/mcp

② Claude Code (terminal)

claude mcp add --transport http stoichiometry-calculator https://edge.vinkius.com/vk_preview_xWsuANB0VyqxoT7uCs4CZE1OJqGmT5chF3qcT0ow/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "stoichiometry-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_xWsuANB0VyqxoT7uCs4CZE1OJqGmT5chF3qcT0ow/mcp"
    }
  }
}

Get full access on Vinkius

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