---
title: "Weighted Decision Matrix Calculator | Bright Peaklet"
description: "Score options against weighted criteria and see them ranked, plus how far one weight would have to move to change the winner. Saved in your browser."
url: https://brightpeaklet.top/
---

# Weigh up your options, one criterion at a time

List the options, decide what matters and how much, score each option from 0 to 10. The matrix adds it up, ranks the options and tells you how solid the answer is.

## Ranking

Laptop C comes out on top

1. 1st Laptop C **104** 74.3%
2. 2nd Laptop B **97** 69.3%
3. 3rd Laptop A **95** 67.9%

Weighted total = Σ weight × score. The percentage is the total out of the best possible 140 (every score 10).

### How sensitive is this?

Raising the weight of **Price** from 5 to 6.75 would tie Laptop C with **Laptop B**; go past that and Laptop B wins. That is a sizeable change, so the lead looks fairly safe.

### Each criterion's share of the weight

- Price 35.7%
- Battery life 28.6%
- Weight 21.4%
- Screen 14.3%

Your matrix is saved in this browser only.

## How a weighted decision matrix works

Put the options down the side and the things that matter across the top. Give each criterion a weight for how much it counts, then score every option on every criterion. An option's total is the sum of weight × score, so a strong score on a heavy criterion counts for more than one on a light criterion.

Total = Σ weight × score; share of maximum = total ÷ (Σ weights × 10)

In the laptop example, Laptop C scores 5, 9, 9 and 8 on price, battery, weight and screen, weighted 5, 4, 3 and 2: 25 + 36 + 27 + 16 = 104 out of a possible 140, or 74%. Laptop B wins on price but loses elsewhere and finishes on 97.

The sensitivity check asks what people forget to ask: how far would one weight have to move to change the answer? If a small change would do it, the options are close, and the decision may hang on something you haven't scored yet.

## Sources

- American Society for Quality, [Decision matrix](https://asq.org/quality-resources/decision-matrix): listing options and weighted criteria, rating and multiplying.
- [Weighted sum model](https://en.wikipedia.org/wiki/Weighted_sum_model), the scoring rule used here, and Pugh S. *Total Design: Integrated Methods for Successful Product Engineering* (Addison-Wesley, 1991), on comparing concepts against criteria.

## More ways to decide

Four more tools for priorities, trade-offs and money over time.

- [Eisenhower matrix](https://brightpeaklet.top/eisenhower-matrix/): Sort tasks by urgent and important, drag them between quadrants, print the plan.
- [Pros and cons list](https://brightpeaklet.top/pros-and-cons-list/): Weight each pro and con from minor to decisive and get an honest verdict.
- [Pairwise ranking](https://brightpeaklet.top/pairwise-ranking/): Compare items two at a time and get a ranked list with win counts.
- [Cost-benefit analysis](https://brightpeaklet.top/cost-benefit-analysis/): Costs and benefits year by year, with net present value and benefit-cost ratio.

## Recommended

Two free services for the research that goes into a decision.

Disposable email · no sign-up

### CleanTempMail

Comparing products or providers often means signing up for brochures and quotes you may never use. CleanTempMail gives you a free temporary inbox at once, with no sign-up, a random or custom address on hundreds of domains, and messages deleted automatically after 3 days.

[Get a temporary inbox](https://cleantempmail.com/)

Disposable cloud browser · free site checks

### WebTraceCheck

About to choose a supplier or shop you found online? WebTraceCheck's free DNS and domain lookup shows the details behind a site's domain, and its disposable cloud browser opens unfamiliar links on an isolated desktop that is deleted after each session.

[Try WebTraceCheck](https://webtracecheck.com/)

## Questions

**How should I choose the weights?**

Rank the criteria first, then give the most important the biggest number. A must-have, such as a budget limit, is not a weight: drop the options that fail it before scoring.

**Does 10 always mean best?**

Yes. For price, the cheapest option gets the highest score. Scoring some criteria the other way round is the most common mistake with a decision matrix.

**Where is my matrix kept?**

Only in this browser's local storage. Nothing is uploaded; Clear empties it, and the CSV download gives you a copy to keep.