Even Chance
Probability of Success (0-1): 0.5; Number of Successes: 50; Number of Failures: 50
Odds Against (From Counts): 1; Odds in Favor (From Counts): 1; Probability from Counts: 0.5; Odds Against (Probability): 1; Odds in Favor (Probability): 1
Odds Calculator
Math0.0(0)
Calculates odds and probabilities, converting between the two and determining odds from event counts.
More tools:Math & Statistics Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Probability of Success (0-1), Number of Successes, and Number of Failures in the units shown.
Step 2
Read Odds Against (From Counts), Odds in Favor (From Counts), Probability from Counts, Odds Against (Probability), and Odds in Favor (Probability) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
High Probability
Probability of Success (0-1): 0.8; Number of Successes: 80; Number of Failures: 20
Odds Against (From Counts): 0.25; Odds in Favor (From Counts): 4; Probability from Counts: 0.8; Odds Against (Probability): 0.25; Odds in Favor (Probability): 4
Low Probability
Probability of Success (0-1): 0.2; Number of Successes: 20; Number of Failures: 80
Odds Against (From Counts): 4; Odds in Favor (From Counts): 0.25; Probability from Counts: 0.2; Odds Against (Probability): 4; Odds in Favor (Probability): 0.25
Explore the topic
Explore More Math & Statistics Calculators
Use calculators for algebra, geometry, trigonometry, probability, statistics, averages, z-scores, tests, and graphing tasks.
People Also Calculate
Related Calculators
Continue with another tool on a related topic.
Math
Floating-Point Calculator
This calculator demonstrates the behavior of floating-point numbers in calculations and highlights potential precision issues due to the way computers store and manipulate these numbers. It allows you to input two numbers and an operation, then displays the result and the difference between the calculated result and a more precise value.
1,286 viewsOpen calculator
Math
Polynomial Graphing Calculator
Visualizes the graph of a polynomial function by calculating and plotting points.
1,203 viewsOpen calculator
Math
Weighted Average Calculator
Calculates the average where some data points contribute more weight than others.
1,152 viewsOpen calculator
Math
Arcsin Calculator (Inverse Sine)
Calculates the angle whose sine is a given number. The result is in radians.
1,152 viewsOpen calculator