Probability Calculator
Find the chance of an event happening. Find the chance of an event and of it happening at least once in several tries.
How to use Probability Calculator
- Enter your values. Phones show the number keypad for number fields.
- Press Calculate.
- Read the result below.
Features
- Free to use with no signup
- Works on phones, tablets and computers
- Runs in your browser, so your data stays on your device
- Nothing to install
Frequently asked questions
How is 'at least once' calculated?
1 - (1 - p)^n, where p is the chance in one try and n is the number of independent tries.
Is my data safe?
This tool runs inside your browser. Your text and files are not uploaded to our server.