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Betting basics · 22 of 36
Odds calculator
In one line: Converts between odds formats and works out a payout, the implied chance and the margin in a price.
On this page
Worked example
Enter +150. The decimal price is 1 + 150 / 100 = 2.50. The fractional price is 3/2, since the profit is 1.5 times the stake. The implied chance is 100 / (150 + 100) = 40%. A $100 stake pays $150 of profit and returns $250 in total.
Illustrative prices, not a live quote.
What the converter shows
The Odds Converter takes one American price, such as +150 or -110, and shows it as a decimal price, an implied probability, the profit on $100 and a fractional price.
Odds formats show the same price three ways: American, decimal and fractional. Switching formats changes how a price is written, not what it pays.
Payouts and implied chance
A payout is your stake plus your profit. The implied chance is the chance a price suggests before a book's margin is taken out.
The Parlay calculator works out the combined odds and payout for several legs, with an optional boost.
Margin and hold
Market Hold takes both sides of a market and shows the margin the book builds in, called the hold. No-Vig Fair Odds takes the same two prices and removes that margin, so you can see each side's fair price.
Where it lives
The calculators sit under Calculators in the Edge tab. They include Odds Converter, No-Vig Fair Odds, Expected Value, Kelly Criterion, Parlay, Arbitrage, Hedge, Market Hold and Bonus Bet Converter.