How to use this tool
Check the units, enter your values, and run the tool. Results follow the assumptions and method below.
Calculation method
Probability of exactly k heads
combinations(n,k)*0.5^nCoin Flip Probability Calculator
Independent fair-coin flips with integer 0≤k≤n.
Independent fair-coin flips with integer 0≤k≤n.
Result
Enter your values and run the tool to see your result.