Probability Calculator
Calculate basic probability from favorable and total outcomes, then view the result as a decimal, fraction, percentage, and complement probability.
Formula:
P(A) = favorable / total
Result will appear here.
| Metric | Value |
|---|
Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
This tool computes the probability of an event from a simple count model:
P(A) = favorable outcomes / total outcomes
Examples
- 3 favorable out of 10 total → probability = 0.3
- Percentage form = 30%
- Complement probability = 1 − P(A)
FAQ
- What does this probability calculator compute?
It computes basic probability from favorable outcomes divided by total outcomes, and also shows complement probability and percentage form.
- What is the formula for basic probability?
Probability = favorable outcomes / total outcomes.
- Can favorable outcomes be larger than total outcomes?
In a standard basic probability setup, favorable outcomes should be between 0 and total outcomes inclusive.
- Are calculations stored?
No. Everything runs locally in your browser.