About this tool
Each flip is an independent 50/50 event from a cryptographic random source — no physical bias, no thumb technique. Flip many coins at once to see the law of large numbers in action: the more flips, the closer the split gets to exactly half.
A coin toss is the simplest model of probability: two outcomes, equal chances and no memory. After five heads in a row the next flip is still exactly 50/50 — believing otherwise is known as the gambler’s fallacy. Streaks are also more common than most people expect: in 100 flips, a run of six or more identical results in a row is more likely than not. Flipping many coins at once is a great way to watch these patterns appear for yourself.
How to use it
- Adjust the options above to match what you need.
- Press Generate (or hit Enter / Space) to create fresh results instantly.
- Click any result to copy it, or use Copy all.
- Download everything as CSV, JSON or TXT, or share a link with your settings.
Popular uses
- Quick decisions — settle “who goes first?” instantly.
- Sports — kick-off and side selection.
- Probability lessons — demonstrate streaks and the law of large numbers.
Why use RandNow?
- Instant & unlimited — no sign-up, no daily caps.
- Private by design — results are generated in your browser, not on our servers.
- Export-ready — copy, CSV, JSON and TXT downloads built in.
- Cryptographically random — powered by the Web Crypto API.
Fair decisions with a coin
Agree who calls before anyone flips, and say out loud what heads and tails mean. For more than two options, flip several times: two flips give four equally likely outcomes, three flips give eight. If you are torn between two choices, notice your reaction while the coin is “in the air” — if you are secretly hoping for one side, you may already know your answer.
A classroom experiment
Ask each student to write a “random” sequence of 100 heads and tails from imagination, then compare it with 100 virtual flips. Invented sequences usually switch sides too often and avoid long streaks, while real ones regularly contain runs of five, six or more. It is a memorable way to show how poor our intuition about randomness can be, and a great starting point for a discussion about probability. Flip again now, or try the random number generator when you need more than two outcomes.
Frequently asked questions
Is the coin fair?
Yes. Heads and tails each have exactly 50% probability on every flip.
Can I flip several coins?
Yes, enter any number up to 1,000 to see the full sequence and percentages.
Is there a keyboard shortcut?
Press the Space bar or Enter to flip again.
Are real coins perfectly fair?
Not quite. Studies of hand-tossed coins suggest they land on the side that started facing up slightly more often — around 51% of the time. A virtual flip has no such bias.
How can I choose between three options with a coin?
Flip twice to get four equally likely outcomes. Assign one to each option and flip again if the fourth outcome comes up.