What's The Probility Of Event With Multiple Tries?

For example, the chance of rolling a 6 one a D6 is 0.167 so if you roll 4 times the chance of rolling at least one 6 is 51.8%.

Or a coin has a 50:50 chance of landing a head and with 3 tosses there's an 87.5% chance of getting a head

This calculator is accurate to two decimal places so if the probability is over 99.99% it will show the answer as 100.00%