Reading odds is the first skill every sports bettor needs. In this guide we explain American, decimal and fractional odds, how favorites and underdogs are priced and how to turn any price into an implied probability, so you can read the BetOnline board with confidence.
American Odds: Favorites and Underdogs
American odds use a plus or minus sign. A minus number, like -150, shows how much you stake to win $100, so the favorite costs more to back. A plus number, like +130, shows what a $100 stake returns, so the underdog pays more for the same stake. The bet slip converts this into a clear payout before you confirm.
Decimal and Fractional Formats
Decimal odds show the total return per unit staked, so 2.50 returns 2.5 times your stake including the stake. Fractional odds, common in racing, show profit against stake, so 3/1 returns three units of profit for every one staked. BetOnline lets you focus on the format you read most easily.
Converting Odds to Implied Probability
Implied probability is the chance a price suggests. For a minus favorite, divide the odds by the odds plus 100. For a plus underdog, divide 100 by the odds plus 100. Comparing implied probability with your own read is how sharp bettors find value on the board.
Reading a Live Odds Board
Odds move with news, money and, in live betting, the score and clock. A shortening price means more support for that side, while a drifting price means less. BetOnline keeps the confirmation step visible so you can lock a price before the market moves again.