Courtside Lab · Experiment

Odds Probability Dial

Drag one dial to see American, decimal, and fractional odds and their implied probability move together.

The experimentInteractive · no signup
Implied probabilitydrag to explore
0%25%50%75%100%50%IMPLIED PROB
Implied Probability
0% · +∞50% · even100% · −∞
Americanunderdog
+100
Decimal× payout per $1 staked
2.00
Fractionalprofit / stake ratio
1/1
Implied %break-even win rate
50%

Every odds format is the same number in a different language. Drag the dial and watch American, decimal, and fractional odds move together, they all express the same implied probability. At 50% the line is even money (+100 / 2.00 / 1/1); at 75% it's a heavy favorite (−300 / 1.33 / 1/3).

Frequently asked2 questions
How are odds and probability related?
Every odds format is just a different way of writing an implied probability. Dragging the dial shows how a price in one format maps to the others and to a percentage.
What is implied probability?
The break-even win rate a price represents: 1 ÷ decimal odds. It includes the sportsbook's margin.
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