Have you ever wondered if it will rain tomorrow or if you will win a board game? That is probability in action! Probability is simply a measure of how likely an event is to happen. Our Simple Probability Calculator is designed to help you understand the math behind these chances using everyday objects like coins and dice.

The math is based on a simple fraction: Favorable Outcomes / Total Possible Outcomes. For example, a coin has 2 sides (Heads, Tails). If you want Heads, there is 1 favorable outcome out of 2 possibilities. So, the probability is 1/2, or 50%. This Simple Probability Calculator does this math for you instantly, showing you the fraction, decimal, and percentage all at once.

Dice Mechanics

A standard die has 6 faces numbered 1 to 6.

• Rolling a 6: Only one face is a ‘6’. Probability = 1/6 (approx 17%).
• Rolling an Even Number: The even numbers are 2, 4, 6. That is 3 favorable outcomes. Probability = 3/6, which simplifies to 1/2 (50%).

Theoretical vs. Experimental: This tool calculates the theoretical probability—what should happen in a perfect world. However, if you use the “Flip” or “Roll” button on our Simple Probability Calculator, you are doing an experiment. In real life, you might flip heads three times in a row! But if you flip it 1,000 times, the results will get closer and closer to the theoretical 50%.