Percentage Wheel — spin by exact probability
The Percentage Wheel is the clearest way to set spin probabilities: input the percentage you want for each entry and the weights are calculated automatically.
Ideal for presentations, lessons, and simulations where the audience needs to see exact probability figures.
Add or rename outcomes in the Inputs panel, set a positive weight for each one, and check the live percentage before spinning. You can disable an outcome temporarily without losing its label or weight.
Exact percentages, no guesswork
Enter the probability you want — the wheel handles the rest.
Percentage-first input
Weights are translated to percentages shown clearly next to every entry.
Presentation-ready
Show stakeholders or students the exact probability before each spin.
Full transparency
All percentages sum to 100 — no hidden rounding surprises.
For raffles, giveaways, and contests where fairness matters, we recommend using a standard equal-probability wheel so every participant has the same chance of winning.
Frequently Asked Questions
- What is the Percentage Wheel?
- The Percentage Wheel is a free online spinner where you assign custom probability weights to each entry. Higher-weight entries are selected more often, making it ideal for probability education, game design, and scenario testing.
- How do I change the probability of an outcome?
- Edit the weight next to each entry in the Inputs panel. The wheel shows the resulting percentage live. Higher weight equals higher probability.
- Are the probabilities transparent?
- Yes. Every entry displays its exact probability percentage so you always know the true odds before you spin.
- Can I reset to equal odds?
- Yes. Click Equalize to set every entry to the same weight, producing a fair equal-probability spin.
- Is this suitable for a fair raffle?
- Weighted wheels are designed for simulations and games, not fair draws. For raffles and giveaways, use the equal-odds main picker wheel so every participant has the same chance.