Coin Flip and Dice Roller

What is coin flip and dice roller?

A coin flip settles small decisions and a die powers board games and role playing games. This tool does both in one place.

For multiple dice, it shows each roll and their total.

How to use the coin flip and dice roller

1. Pick coin or die.
2. Set the number to flip or roll.
3. Press Calculate.

How the coin flip and dice roller works

Each result uses a bias free random draw. A coin has two outcomes. A die with n sides returns a whole number from 1 to n.

Worked example

Common uses of the coin flip and dice roller

• Making quick yes or no decisions.
• Playing board games and tabletop role playing games.
• Teaching probability in class.
• Choosing who starts a match.
• Simulating many flips to see how results spread out.

Tips and common mistakes

For group decisions agree on what heads and tails mean before you flip.

Use a D20 for tabletop games that ask for one.

Background: what to know before you rely on it

A fair coin gives heads half the time, but short runs often look uneven. Five heads in a row happens in about one of every 32 sets of five flips, so streaks are normal. This is the basis of the gambler's fallacy, the false belief that tails is due after many heads. Each flip is independent. Dice work the same way. With two six sided dice, 7 is the most likely total because it can be made in six ways, while 2 and 12 can be made in only one. Role playing games use dice with four to twenty sides to set the odds for different actions.

Private, free and fast

This tool runs entirely in your browser. What you type or choose is not uploaded to a server and is not saved after you close the page, which keeps it fast and private. It is free to use as often as you like. See more in all generators, or browse the full list of tools.

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Results are for information and education. For legal, financial, medical or security decisions, check with a qualified professional. Do not use online generators for regulated draws or critical security keys.