Does a coin have an equal chance to land on both sides? no actually. there is a 51% chance that your coin will land tails up compared to heads up. that is why tails never fails (only 49% of the time). This is because the head of the president on a coin is made of more material than the building or symbol on the tail side. There is a better chance that if you spin a coin on a table, it will land tails up. Certain coins can have an 80% chance that they will land tails side up. Keep this in mind next time you want to win a bet.