What Does +400 Mean in Sports Betting?

+400 is an underdog price. The plus sign means the team is the underdog, and the number is how much you win on a $100 bet. At +400 a winning $100 bet profits $400.00, because the market sees this outcome as less likely.

-400 is the favorite price: you risk $400.00 to win $100, and a $100 bet at -400 returns $125.00 ($25.00 profit), with an implied probability of about 80.0%. +400 is the reverse, an underdog price where $100 wins $400.00. At a sportsbook, the favorite opposite a +400 underdog is usually priced steeper than -400, because the vig comes out of both sides. See the full -400 odds breakdown.

A $100 bet at +400 returns $500.00 total, which is $400.00 in profit. Scale it to any stake with the betting calculator, or add +400 as a leg in the parlay calculator to see what it does to a multi-leg payout. The payout is the same idea at any book; what changes is how much vig is buried in the price.

+400 implies a win probability of about 20.0%. That is the break-even rate: if you think the real chance is higher, the bet has value. Devig the market with the no-vig calculator to compare it to the fair number. On a prediction market, the same 20% reads as a contract priced near 20 cents; the prediction market calculator converts between the two.

+400 American equals 5.00 in decimal odds and 4/1 in fractional odds. Decimal is the easiest format for comparing prices, since a bigger number always means a bigger payout. Convert any price with the odds converter.

Every American price at a sportsbook includes the vig. BettorEdge is a peer-to-peer betting exchange: you trade at market-fair odds with other bettors, so the same outcome can pay more than +400 and you keep more of the win. No sportsbook sets the line.