πŸ’ŽDraw planners

A spinning wheel is fun. A draw that somebody has to trust is a different problem, and it needs proof rather than an animation.

βœ“ Tested & verified Updated: How the randomness works

Free to use, no account

Every tool on this page works straight away, with no account and no limit on how often you use it. Put your numbers in and you get the answer, the same as on the rest of the site.

These tools exist because the ordinary calculators on this site answer a single question, and some questions are not single. A number you need again next month is not a calculation, it is a record.

Frequently asked questions

Do I need an account to use these?

No. Every tool on this page runs in full, free, with no account and no sign-up, exactly like the rest of the site.

What makes these different from the other calculators here?

A quick spin settles who does the washing up. A draw that decides a prize has to be defensible: repeatable, weighted where it should be, and provable to somebody who was not watching.

Where does what I type go?

It is worked out in your browser and stays there. Nothing reaches us unless you ask for an email reminder, and then it is only the address you typed. One click in that email unsubscribes and deletes it.

How the randomness works

Randomness comes from the browser’s cryptographic generator, not from Math.random. The provably fair draw publishes a SHA-256 commitment of the entry list and the seed before the draw and reveals the seed after it, so anyone can replay the draw and get the same winner β€” that is what makes it checkable rather than merely claimed.

More ways to leave it to chance

Sealed draw for a giveaway

One-off

Tell us the draw date. We seal a random seed now and publish its fingerprint straight away, then send you the seed itself on the day β€” so nobody can claim you picked the winner.

Free, no account. One click unsubscribes and deletes your address.