10 Flips, 5 Heads
Number of Coin Flips: 10; Number of Heads (k): 5
Probability of At Most k Heads: 1.243397993 %; Probability of At Least k Heads: 1.243397993 %; Probability of Exactly k Heads: 1.243397993 %
Coin Flip Probability Calculator
Math0.0(0)
Calculates probabilities for various outcomes of multiple coin flips (e.g., exactly k heads).
More tools:Math & Statistics Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Number of Coin Flips and Number of Heads (k) in the units shown.
Step 2
Read Probability of At Most k Heads, Probability of At Least k Heads, and Probability of Exactly k Heads in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
5 Flips, 2 Heads
Number of Coin Flips: 5; Number of Heads (k): 2
Probability of At Most k Heads: 0.165011845 %; Probability of At Least k Heads: 0.165011845 %; Probability of Exactly k Heads: 0.165011845 %
20 Flips, 10 Heads
Number of Coin Flips: 20; Number of Heads (k): 10
Probability of At Most k Heads: 9.947183943 %; Probability of At Least k Heads: 9.947183943 %; Probability of Exactly k Heads: 9.947183943 %
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