Is this truly random?

Yes. It uses the Web Crypto API for cryptographic randomness — the same quality used for encryption. Each flip is an independent 50/50 chance.

Can I flip multiple coins?

Yes. Set the number of flips to any value from 1 to 1000. You will see the total heads and tails count with percentages.

Coin Flip

Flip a virtual coin to get heads or tails. Uses cryptographic randomness for fair results. Flip multiple coins at once and track your history.

How This Coin Flipper Works

This tool uses the Web Crypto API to generate cryptographically secure random numbers, the same quality of randomness used in encryption and security applications. Each flip produces an independent, unbiased result with exactly 50% probability for heads and 50% for tails. Unlike pseudorandom generators, the Web Crypto API draws from hardware-level entropy, making results truly unpredictable and fair.

Coin Flip Probability

P(Heads) = P(Tails) = 0.5 (50%)

P(n Heads in a row) = (0.5)^n

Each flip is independent — past results never affect the next flip.

The Mathematics of Randomness

A fair coin flip is a Bernoulli trial with equal probability for each outcome. Over many flips, results converge toward 50/50 due to the law of large numbers, but short sequences can appear streaky. Getting five heads in a row has a 3.125% chance and is perfectly normal. The gambler's fallacy is the mistaken belief that past results influence future flips.

When to Use a Coin Flip

Coin flips are used for quick decisions, settling friendly disputes, starting sports matches (the NFL uses a coin toss for overtime), and teaching probability concepts. In research, randomization through coin-flip-style methods helps eliminate selection bias. When facing decision paralysis between two equally valid options, a coin flip can break the tie and reveal which outcome you were hoping for.