How Weighted Random Selection Works
Use relative weights responsibly and calculate the displayed chance for every option.
Wheel Tools
Decision Wheel
Add choices, apply optional weights and spin a private decision wheel for everyday choices.
🔒 Your list is processed locally in your browser. It is not uploaded unless you create a share link.
Input & settings
Optional weight format: Option|2. Chance is displayed before spinning.
Result
Configure the tool, then run it.
Result history
- No results yet.
Quick answer
What does this tool do?
Decision Wheel makes a random choice from options that are already acceptable. A positive number after a vertical bar sets relative weight, and the page displays each option’s resulting percentage before the spin.
- Input format
- Option or Option|weight
- Probability
- Weight divided by total weight
- Result handling
- Keep or remove
- Selection method
- Weighted Web Crypto draw
Why use this tool?
Break a low-stakes tie with a visual decision wheel. Add a weight after an option with a vertical bar, such as “Cook at home|2”, to make its relative chance visible while keeping the final selection cryptographically random.
How to use it
- Choose a template or enter your options.
- Add optional numeric weights after a vertical bar.
- Spin the wheel.
- Keep or remove the selected option and share only if you choose.
Common use cases
- Choose dinner
- Plan a movie night
- Decide who goes first
Practical examples
- Give a nearby restaurant twice the chance of a farther option.
- Choose one approved activity for a team break.
- Resolve who goes first among willing participants.
How it works
Random values come from window.crypto.getRandomValues(). Lists are shuffled with an unbiased Fisher–Yates process. For a wheel, the result is chosen before the animation; for weighted entries, each positive weight defines its share of the total probability.
Limits to understand
- Filter unsafe or unsuitable choices before spinning.
- Weights are relative, not percentages unless they sum to 100.
- Do not delegate high-impact decisions to a wheel.
Privacy
Input and results stay inside this browser during normal use. Local saving is optional. If you select Create Share Link, the visible list and settings are uploaded under a hard-to-guess token and expire automatically.
Last reviewed: August 27, 2026
Decision Wheel FAQ
Is my list uploaded?
No. Entries are processed in your browser unless you explicitly create a share link.
What kind of randomness is used?
The browser Web Crypto API supplies unbiased random values. Wheel animation only reveals a result chosen in advance.
Does it work on phones?
Yes. The controls, results and wheel adapt to current mobile browsers and keyboard navigation.
Can I reuse my settings?
Yes. Device storage can remember recent settings unless you turn off local list saving.
Is this suitable for a certified lottery?
No. It is a general-purpose classroom, work, event and decision tool, not a regulated drawing system.
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Related guides
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Build a useful meal wheel by filtering allergies, budget and travel distance first.