Tool Calculator

A math calculator tool for AI agents. Evaluates mathematical expressions — whitelisted functions only.

Written By pvdyck

Last updated 21 minutes ago

Tool Calculator

The Tool Calculator gives AI agents the ability to evaluate mathematical expressions accurately, instead of relying on the LLM's (often unreliable) built-in math capabilities.

How It Works

When connected to an Agent node, the calculator appears as a tool the agent can invoke. During reasoning, if the agent encounters a math problem, it calls the calculator with an expression and receives the exact result.

Parameters

This node has no configurable parameters. It automatically registers as a tool named "calculator" with the connected agent.

Supported Operations

CategoryAvailable
Operators+, -, *, /, ^ (power), % (modulo), parentheses
Math functionsMath.abs, Math.ceil, Math.floor, Math.round, Math.sqrt, Math.pow, Math.sin, Math.cos, Math.tan, Math.log, Math.exp, Math.min, Math.max
ConstantsMath.PI, Math.E

Connects To

Parent NodeDescription
AgentProvides the agent with a calculator tool for math operations.

Limitations

  • Math expressions only — Cannot execute arbitrary code or access workflow data.
  • Whitelisted functions only — Only the Math functions listed above are available. No custom functions.
  • Cannot be used standalone — must be connected to an Agent node.

Tips

  • Always connect the Calculator when your agent may need to do math — LLMs frequently make arithmetic errors without it.
  • The agent decides when to use the calculator based on its reasoning. You can encourage use via the agent's system prompt.
  • For custom logic beyond math, use the Code Tool instead.

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