Spin Wheel With Percentages

This free spin wheel with percentages lets you set the exact chance of every slice. Add *25% after an entry, and the slice size, the odds and the secure draw all follow it.

Exact % per slice
Slices sized to the odds
Built-in 100,000-spin test
Free, no sign-up

Click the wheel or press Ctrl + Enter to spin

One entry per line

Paste a whole list at once. To give an entry more chances, add *2, *3… at the end of its line, or set an exact share with *25%.

Quick lists:

Remove winner after each spin (no repeats) Show each entry’s chance Sound Confetti Spin time

Run thousands of spins on your current list in a few seconds, using exactly the same secure draw as the wheel, and compare each entry’s real share with its expected share. Test spins are not added to your results.

List fingerprint (SHA-256)…

Post this fingerprint before a draw. Afterwards anyone can paste the list on the verify page to check it wasn’t changed.

Spins

How it works

How to Set Percentages on the Wheel

Type one outcome per line.
Add the chance after a star, like Grand prize *5%. Decimals work too, like Jackpot *0.5%.
Check the note under the list. It tells you if your percentages add up to 100%, or how the wheel handled them if they don’t.
Turn on “Show each entry’s chance” in the options to see the real odds of every slice.
Spin. The winner is drawn with those exact odds before the wheel starts moving.

The rules

What Happens When It Doesn’t Add Up to 100%

Exactly 100%: each slice gets the share you typed.
More or less than 100%: each percentage is scaled to its share of your total. A *30% and B *60% add up to 90%, so A gets 33.3% and B gets 66.7%.
Some lines without a %: they share whatever is left equally. A *50%, B and C gives B and C 25% each.
No room left: if your percentages already reach 100%, lines without a % get no chance, and the note says so.

Percent or weight?

Percentages vs. Weights

The wheel understands two ways of setting odds. Use whichever is easier for your list. For bonus entries in giveaways, see how to give someone more entries fairly.

You type	What it means	Resulting chances
`A 25%` … `D 25%`	An exact share for each line	25% each
`A 3`, `B 1`	A has 3 chances for every 1 of B’s	A 75%, B 25%
`A *10%`, `B`, `C`	A fixed share; the rest split the remainder	A 10%, B 45%, C 45%
`Save 10%`	No star, so it’s just a name	Equal chance with other names

Writing a % without a star, like Save 10%, keeps it as part of the entry’s name, so prize names with percentages are safe.

Proof

We Tested the Odds With 100,000 Spins

Every wheel on this site has a Fairness tab that runs thousands of spins using the same secure draw as the real wheel. We ran 100,000 spins on the prize wheel above:

Slice	Set to	Came up	Times
Grand prize	5%	4.93%	4,931
Runner-up	15%	15.13%	15,126
Small prize	30%	30.03%	30,029
Try again	50%	49.91%	49,914

The biggest gap was 0.13 percentage points, which is normal random variation (chi-square test, p = 0.54). Run the test on your own wheel from the Fairness tab, and read how our draws work.

Honest wheels

Slices Match the Real Odds

On this wheel, a 5% slice is drawn as 5% of the circle. Some prize wheels show equal-sized slices but use hidden odds, which looks fair when it isn’t. Here, what people see is what they get.

If you run a prize wheel for customers, tell players the odds or show the chances list. Promotions and prize draws are regulated in many places, so check the rules where you run it. Our guide to rigged wheels explains what to look out for.

Odds calculator

How Many Spins Until It Comes Up?

Each spin is independent: the wheel has no memory, so a slice isn’t “due” after a long gap. Use this calculator to see the chance of an outcome over several spins.

Chance of the outcome on one spin (%)

Number of spins

A 5% slice has a 64.2% chance of coming up at least once in 20 spins, and a 35.8% chance of not coming up at all.
A 1% slice needs 69 spins for an even chance of appearing once, and 230 spins for a 90% chance.
The chance of at least once in n spins is 1 − (1 − p)ⁿ, where p is the chance on one spin.

Ideas

Where a Percentage Wheel Helps

Prize and discount wheels

Make the big prize rare and small rewards common, and show players the real odds. The Discount wheel quick list has an example.

Teaching probability

Set Red 50%, Blue 25%, Green 25%, predict the results, then run 100 or 1,000 test spins to compare theory with experiment. More ideas on our classroom wheels.

Games and rewards

Rare, epic and legendary drops, bonus rounds or forfeits that should only happen now and then.

Decisions with a favourite

Want the wheel to lean toward one option without removing the others? Give it a bigger share, or use weights on the decision maker.

FAQ

Frequently Asked Questions

How do I make a spin wheel with percentages?

Type each outcome on its own line and add a star and a percentage after it, like Prize *20%. The slice sizes and the draw follow those percentages.

Do my percentages have to add up to 100%?

No. If they don’t, each is scaled to its share of the total, and the note under the list tells you. Lines without a % share whatever is left.

Can I use decimal percentages?

Yes. Jackpot *0.5% works. Very small slices are hard to see, but they are drawn with the exact chance.

Does the slice size match the chance?

Yes. Each slice takes up the same share of the circle as its chance of winning.

How can I see the odds while spinning?

Open Options and turn on “Show each entry’s chance”. It lists the real percentage of every slice.

What’s the difference between *25% and *25?

*25% sets a share of the wheel. *25 gives that line 25 chances compared with 1 for a plain line.

Is a weighted wheel rigged?

Not if the odds are open. A wheel is unfair when it hides its odds. This one shows them, sizes slices to match, and lets anyone test them.

Is the draw really random?

Yes. Each result is drawn with your browser’s secure random number generator, weighted by your percentages, before the wheel moves.

Keep exploring