Add segments, then spin locally.
Calculation details
Planning estimate only, not financial, tax, or legal advice. Verify assumptions and current rules before making decisions.
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Use this result
Share the current inputs or ask ChatGPT to explain the calculation in context.
What does this calculator estimate?
An 8-segment wheel gives each segment a 12.5 percent chance of landing on the pointer. Each segment's win probability equals its share of the wheel.
- Segment probability = segment share of the wheel.
- The wheel uses physics-based deceleration with unbiased landing.
- 8 equal segments mean 100 / 8 = 12.5 percent per segment.
How the wheel works
The wheel rotates with realistic deceleration and lands on a segment chosen by a random draw — each segment's odds equal its share of the wheel. Custom labels make it a giveaway wheel, decision wheel, or game tool.
Limitations to watch for
The random source is a strong pseudorandom generator — suitable for giveaways and games. For legally significant draws, use a certified process. Weighted segments are proportional to their arc size.
How to use it in practice
Label the segments (prizes, names, options), spin, and read the winner. Use it for spin-to-win promotions, classroom picks, and decisions. Re-spin for a fresh result — each spin is independent.
['Add the segment labels.', 'Spin the wheel.', 'Read the winning segment.']
How this calculator works
Formula
Spins a segmented wheel with a physics-based decelerating rotation and unbiased random landing. Each segment's win probability equals its share of the wheel.
Worked example
An 8-segment wheel gives each segment a 12.5% chance of landing on the pointer.
Assumptions to verify
- Segments are equally weighted by default.
- The RNG is unbiased for practical purposes.
- Each spin is independent.
Frequently asked questions
How does the prize wheel work?
It spins with deceleration and lands on a randomly selected segment — odds equal each segment's share of the wheel.
Can I customize the segments?
Yes — add your own labels for prizes, names, or options.
Is the spin fair?
Each segment's win probability equals its arc share, using a strong random source.
What is this used for?
Giveaways, spin-to-win promotions, classroom picks, and decisions.
Can I weight segments?
Odds follow segment size — make a segment bigger for higher odds.
Is the result legally binding?
For meaningful draws, use a certified process — this is for practical use.
Can I reuse it?
Yes — every spin is independent; re-spin as often as you like.
Cite this tool
BoringToolsKit. “Prize Wheel Spinner.” boringtoolskit.com/prize-wheel/ (reviewed 2026-08-25). Free to reference in articles, syllabi, and answer posts with a link.
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