Free Online Probability
Basic probability P = favorable / possible, plus complements. Everything runs in your browser so your files and text stay on this device.
P(not A)
0.6
- P(A and B), independent
- 0.2
- P(A or B), independent
- 0.7
- P(A or B), mutually exclusive
- 0.9
- P(exactly one)
- 0.5
- P(neither)
- 0.3
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Tasks
Run the calculation
Enter the inputs and read the result card.
How to use
- Open the tool.
- Fill in the fields.
- Read the result (updates as you type).
FAQ
What does Probability do?
Basic probability P = favorable / possible, plus complements.
How do I run the calculation?
Enter the inputs and read the result card.
How do I use Probability?
Open the tool. Fill in the fields. Read the result (updates as you type).
Is my data private?
Yes. Work stays in your browser. Content is not sent to a server to run the tool.