Probability Table: Probability by Favourable outcomes
Reference table of probability for Probability across a range of favourable outcomes values — exact, engine-computed figures you can read off at a glance.
Probability Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Probability
16.67%
- As a decimal
- 0.1667
- Odds against (to 1)
- 5.00
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Probability Calculator
The Probability Calculator works out your probability, along with 2 related figures in an instant. Enter favourable outcomes and total possible outcomes and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the favourable outcomes.
- Enter the total possible outcomes.
- Read off your probability, together with as a decimal and odds against (to 1) — the calculator updates automatically, with no button to press.
Formula
The Probability Calculator uses the formula:
Probability = Favourable outcomes ÷ Total possible outcomes × 100
Worked example
For example, with favourable outcomes of 1 and total possible outcomes of 6, the probability is 16.67%.
| Favourable outcomes | 1 |
|---|---|
| Total possible outcomes | 6 |
| Probability | 16.67% |
|---|---|
| As a decimal | 0.1667 |
| Odds against (to 1) | 5.00 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Probability
- The likelihood of an event, from 0 (impossible) to 1 (certain), often shown as a percentage.
Frequently asked questions
Divide favourable outcomes by total possible outcomes. Rolling a specific number on a die is 1 ÷ 6, about 16.67%.
Probability compares favourable outcomes to all outcomes; odds against compare unfavourable to favourable. A 1-in-6 chance is 5-to-1 odds against.
No. Probability ranges from 0% (impossible) to 100% (certain), so favourable outcomes never exceed the total.
For independent events both happening, multiply their probabilities. For either one happening, add them and subtract the overlap.
Enter the favourable outcomes. Enter the total possible outcomes. Read off your probability, together with as a decimal and odds against (to 1) — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Probability: Formula, Steps & Examples
Learn how to calculate Probability — the formula explained step by step, with worked examples and a free calculator to check your answer.