# Decision Matrix Tool

> A free weighted decision matrix: add options and criteria, set weights, score each option 1 to 5 and see which one wins and by how much. Runs in your browser.

Canonical: https://mentarium.io/tools/decision-matrix.md

Tool

Score your options against weighted criteria and see which one wins, and by how much. Weights run 1 (minor) to 5 (critical); scores run 1 (poor) to 5 (excellent).

A close result (within about 10%) means the numbers can't decide for you: run a [pre-mortem](https://mentarium.io/mental-models/pre-mortem) on the top two, or ask which choice you'd regret more with the [regret minimization framework](https://mentarium.io/mental-models/regret-minimization-framework). The full guide with a worked example: [how to use a decision matrix](https://mentarium.io/decision-making/decision-matrix).

 The Mentarium Decision Journal

Write the decision down. Review it later. Get calibrated.

An Obsidian vault built on the Decision Loop: a guided template, a review queue for decisions that are due, and a calibration dashboard that shows how often you're right at 70%, 80%, 90%.

 [See Decision Journal · $29](https://mentarium.io/shop/decision-journal)