Step-by-step instructions
- Enter or select Favorable outcomes.
- Enter or select Total outcomes.
- Tap Calculate.
- Review the result shown directly below the calculator.
Probability Calculator
Calculate probability from favorable outcomes and total outcomes.
How to use the Probability Calculator
Calculate probability from favorable outcomes and total outcomes.
What the inputs mean
- Favorable outcomes
- Enter the value requested by this field label.
- Total outcomes
- Enter the full amount, target, goal, or capacity used as the comparison value.
Formula or calculation method
Probability is favorable outcomes divided by total possible outcomes.
Example
For example, 1 favorable outcome out of 4 total outcomes equals a 25% probability.
How to understand the result
Use the result as an estimate based on the values you entered. For planning decisions, double-check that the input units and assumptions match your real situation.
Tip: Keep all values in compatible units and use values from the same time period when the calculator compares two amounts.