Coin Flip Probability Calculator
Calculate Coin Flip Probability
Formula
P(exactly k heads in n flips) = C(n, k) x 0.5^n, where C(n, k) = n! / (k! x (n-k)!).
Frequently Asked Questions
How is the coin flip probability calculated?
Using the binomial probability formula: P = C(n,k) x 0.5^n, where n is the number of flips, k is the desired number of heads, and C(n,k) is the binomial coefficient.
What is a fair coin?
A fair coin has an equal probability (50%) of landing on heads or tails for each flip. This calculator assumes a fair coin.
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