Fair little tools for chance

Flip a coin, roll some dice, or pick a number.

How many coins

Each coin has an equal chance of heads or tails.

Recent flips

How it stays fair

Every result comes from your browser’s cryptographic random source. Rejected draws remove rounding bias. The answer is chosen before the animation starts.

A real coin is not quite fair. In 350,757 hand flips, coins landed the same way up they started 50.8% of the time (Bartoš and colleagues, 2023). This one is exactly 50/50.

Choose a tool above. Each result is picked before its animation starts.