Is the Wheel Random? Test It Yourself

Is an online spinning wheel random?

A well-built online wheel is random. TrySpinTheWheel picks every winner with your browser's cryptographic random number generator, crypto.getRandomValues, before the wheel starts turning. The animation then lands on that slice. Each entry's chance equals its share of the total weight, so 8 equal entries each have a 1 in 8 (12.5%) chance.

How does the wheel pick a winner?

1. The wheel reads the visible entries and their weights. Equal entries have a weight of 1.
2. The browser draws a 32-bit cryptographic random number, one of 4,294,967,296 possible values.
3. That number is mapped onto the entries in proportion to their weights, which selects the winner.
4. The wheel animates to a random point inside the winner's slice. A flick spin only changes the speed of the animation, not the result.

The test above uses the same picker to spin your list as many times as you choose, so you can see the distribution for yourself.

Why does the same entry win twice in a row?

Repeats are normal on a fair wheel. Every spin is independent, so the wheel has no memory of earlier results. With 10 entries and 5 spins, the chance that at least one entry wins twice is 69.8%. Use the repeat calculator above to check any wheel size. To stop repeats, choose Remove the winner under "After each spin" on the spin the wheel page.

Can a spinning wheel be rigged?

A website can technically show any result it wants, so trust depends on what you can check. On TrySpinTheWheel, the only way to change the odds is a visible weight such as Pizza *3, which also makes that slice 3 times bigger. Nothing is hidden: the code runs in your browser and the test above shows the real distribution.

For giveaways, use 🔒 Lock list before the draw. Locking creates a fingerprint of the list that you can post publicly. After the draw, the receipt lets anyone confirm that the list did not change and that the recorded random numbers produce the announced winner. Anyone can check a receipt on the verify page.

How do you prove a giveaway draw was fair?

Lock the list, post the fingerprint, draw on a live stream or screen recording, and publish the receipt link. These four steps cover the main ways a draw can be doubted: a changed list, a secret re-spin and a made-up winner. The fair giveaway guide explains each step.

What do the test results mean?

• Bars: how often each entry won. The thin line shows the expected share.
• Largest gap: the biggest difference between an entry's result and its fair share. More spins make this gap smaller.
• p-value: a value above 0.01 means the results fit a fair draw. Roughly 1 run in 100 falls below 0.01 by chance alone, so run the test again if you see one.