MyAIUtility

Probability Calculator

Calculate probabilities for single events, combined events, and binomial distributions

Single Event Probability

Probability
0.3
30.00%
Complement P(not A)
0.7
70.00%
Favorable
3
Unfavorable
7
Odds (for:against)
3:7

Probability Formulas

Basic Rules

  • P(A) = favorable / total
  • P(not A) = 1 - P(A)
  • 0 ≤ P(A) ≤ 1

Combined Events

  • P(A or B) = P(A) + P(B) - P(A and B)
  • P(A and B) = P(A) × P(B) [if independent]
  • P(A|B) = P(A and B) / P(B)