Created By : Vaibhavi Kumari
Reviewed By : Rajashekhar Valipishetty
Last Updated : Mar 21, 2023

An online free coin toss probability Calculator assists you to find the probability of tossing a coin in just a blink of an eye. For that, you need to give the inputs in the below boxes and press the calculate button.

Total Number of times a coin is tossed(n)
No. of heads

How to Find the Probability of Coin Toss ?

Follow the steps which are showing below to calculate the probability of tossing a coin:

  • When you toss a coin the possibility of getting a head is ½ and the possibility of getting a tail is also the same as a head.
  • If you toss a coin n number of times the possibility of acquiring one head will be ½n.
  • After that, for finding the possibility we need to apply the formula.
  • Then, you will get the probability of possible outcomes.

Example Problem for Coin Toss Probability

Question: Find the probability of obtaining 3 heads when you toss a coin 5 times?


Number of times you need to toss a coin (n) = 5

Total Possible outcomes = 2n= 25=2x2x2x2x2 = 32.

Total no.of favourable outcomes = 5C3 = 10

No.of heads = 3.

Let us use the probability formula,

Probability = no of favorable outcomes/ total number of possible outcomes

probability = 10/32. is entirely free and includes calculators for solving problems. Learn your probability concepts easily using these calculators.

FAQs on Coin Toss Probability Calculator

1. What is the probability of obtaining a tail when a coin is tossed?

The possible outcomes when a coin is tossed are 2, i.e. head or tail. The probability of getting a tail when a coin is tossed is 1/2 or 50%.

2. How do I calculate the Probability?

Probability can be calculated using the formula, probability = No. of favorable outcomes/ total no.of possible outcomes.

3. What are the rules of Probability?

  • First Rule: Probability value should lie between 0 and 1.
  • Second Rule: The sum of the probability of all possible outcomes should be equal to 1.

4. What is the best tool to calculate Probability?

Coin Toss Probability Calculator is the best tool available on