# Free tools for better decisions

> Free interactive decision tools: a weighted decision matrix, the Decision Weight Score calculator, an IQ practice test and the Decision Coach for your AI chat.

Canonical: https://mentarium.io/tools

Tools

They run in your browser. Nothing you type is sent or stored.

[ToolDecision Matrix ToolScore your options against weighted criteria and see which one wins, and by how much.](https://mentarium.io/tools/decision-matrix) [ToolDecision Weight Score CalculatorRate reversibility, impact and uncertainty to see how much process a decision deserves.](https://mentarium.io/tools/decision-weight-score) [TestIQ practice test30 questions in 20 minutes, scored instantly, answers explained.](https://mentarium.io/iq/test) [MCPDecision CoachThe Decision Loop, Model Stacks and Bias Radar inside Claude or ChatGPT.](https://mentarium.io/coach)