True or False Wheel
Spin for a random true or false result with even fifty-fifty odds. Great for quizzes, review games, and quick class calls.
Fair by design: each spin draws from your browser’s cryptographic random number generator, giving every entry an equal 1-in-2 chance. No server is involved.
2 entries on the wheel, up to 500.
Every entry has an equal 1-in-2 chance. Write "True *3" to make an entry three times as likely.
The entries travel in the part of the link after the #, which browsers never send to a server. Nobody, including us, can read a shared wheel from a log.
Please keep the attribution link on the last line. It is the only thing we ask in return, and it is what pays for the wheel being free.
True or False Wheel at a glance
| Slices | 2, 180° each |
|---|---|
| Chance per slice, per spin | 1 in 2 (50.0%) |
| Chance of a given slice in 10 spins | 99.9% |
| Average spins to see every slice | 3 |
| Category | Decision wheels |
| Randomness source | crypto.getRandomValues, tested |
| Last updated |
When to spin the True or False Wheel
The true or false wheel is a quizmaster's little helper. Teachers spin it to decide whether the next statement they read aloud should be true or false, which keeps a review game unpredictable and stops students from spotting a pattern in the questions. Trivia hosts use it the same way for lightning rounds, and party games use it for two truths style challenges where the wheel decides if the next story must be real or invented. It also works as a neutral referee: when a group splits on a claim, spin to decide which side has to argue the opposite position for fun. Both slices carry a clean fifty percent chance, so over a long quiz the mix of answers stays balanced without the host thinking about it. Swap the labels to Fact and Fiction or Real and Fake in the entries box to match your game's flavor.
2 slices: odds, streaks and repeats
Two slices make this a coin flip you can watch: True or False, 50.0% each, with no memory between spins. Streaks are normal. True three spins running happens 12.5% of the time, and five running 3.1%. A streak is not a sign the wheel is stuck; it is what fair randomness looks like.
Tips for spinning it in front of a group
- With 2 slices of 180° each, even the longest label, "False", prints large enough to read from the back of a room. Press Present for a full-screen wheel: Space or Enter spins and Esc returns to the page.
- Spin once and commit to the answer. Spinning again until True comes up turns a fair draw into a vote.
- Already leaning one way? Write "True *3" and True comes up 75.0% of the time against 25.0% for False, a tilt everyone can see rather than a quiet re-spin.
Running a true or false quiz with the wheel
The trick that makes a true or false round work is deciding the answer before the question exists. Write each statement in two versions, one true and one false, spin, and read out whichever version the wheel picks. A host who chooses by feel tends to slip into habits, alternating answers or saving False for the trickiest statements, and a sharp class reads those habits within a few questions. The wheel has no habits, so students have to judge the statement itself.
Spin on your own laptop or phone, not on the projector: in this format the wheel’s result is the answer key. The public version is a debate game. Put a claim on the board, press Present so the wheel fills the screen, and let the spin decide whether the next student argues that the claim is true or false. Space or Enter spins in that view and Esc returns to the page.
Why the answers rarely split half and half
Over a 20-question round the single most likely result is exactly ten True and ten False, yet it comes up only about 18% of the time: 184,756 of the 1,048,576 equally likely sequences. Roughly half of all rounds split 12 to 8 or wider, and about three rounds in four contain a run of four identical answers somewhere. That is what a fair 50/50 looks like, not a fault. If your quiz needs an exact balance, replace the two entries with ten lines of True and ten of False and tick Remove after pick: each answer leaves the wheel once drawn, so twenty spins deal out a random order with the split guaranteed. Leave the Remove duplicates button alone for this one, since the repeats are the point.
Frequently asked questions
Is the true or false wheel a fair 50/50?
Yes. Both slices are the same size and every spin draws from the browser's cryptographic random source, so True and False each have exactly a 50% chance, and no spin is influenced by the one before.
How do quiz hosts use a true or false spinner?
Write each statement in a true and a false version, spin where the class cannot see, and read out the version the wheel picks. Because chance decides the answer, students cannot guess it from the host's habits.
Why do I get several Trues or Falses in a row?
Runs are normal for a fair 50/50. About three 20-question rounds in four contain four identical answers in a row somewhere, and only about 18% split exactly ten and ten.
Can I guarantee exactly ten True and ten False answers?
Yes. Replace the entries with ten lines of True and ten of False, then tick Remove after pick. Each answer leaves the wheel once drawn, so twenty spins give a random order with an exact 10 to 10 split.
Can I relabel the two slices to "Yes" and "No"?
Definitely, swap the words in the list under the wheel and it becomes a Yes/No or even a "Do it / Skip it" decider. The even 50/50 split stays the same whatever you call the two sides.
Put this wheel on your own site
One line of HTML. No tracking, no cookies, and it works on any page. The embed code sits under the wheel above, and the embed guide has a copy-paste block for WordPress, Google Sites, Notion, Moodle, Canvas and OBS.
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