Odds explained · odds-against price
+400 odds: payout and meaning
A plus sign means an odds-against price, the kind usually offered on the underdog. +400 means a $100 bet wins $400.00 in profit and returns $500.00 including your stake.
+400 payout chart
| Stake | Profit if it wins | Total payout |
|---|---|---|
| $10 | $40.00 | $50.00 |
| $20 | $80.00 | $100.00 |
| $25 | $100.00 | $125.00 |
| $50 | $200.00 | $250.00 |
| $100 | $400.00 | $500.00 |
| $200 | $800.00 | $1,000.00 |
| $500 | $2,000.00 | $2,500.00 |
| $1,000 | $4,000.00 | $5,000.00 |
Payout = stake + profit. A losing bet loses the stake; a push (tie, where offered) returns it. In pounds: £100 wins £400.00. Any stake: bet calculator.
How much to bet to win a set amount at +400
| To win (profit) | Stake needed |
|---|---|
| $10 | $2.50 |
| $50 | $12.50 |
| $100 | $25.00 |
| $500 | $125.00 |
Break-even win rate at +400
The implied probability of +400 is about 20.00% (1 ÷ the exact decimal odds, shown rounded). That is the break-even win rate: if you bet this price many times on win-or-lose bets, you need to win more often than that to come out ahead. Whether a +400 bet is good value depends only on whether your honest estimate of the chance beats that number — the EV calculator does the comparison.
+400 in a parlay
Two +400 legs parlayed combine to decimal odds of 25.00 (+2400): a $100 two-leg parlay pays $2,500.00 if both win. Three legs: decimal 125.00 (+12400), paying $12,500.00 on $100. For independent selections from different events, those prices imply a break-even chance of about 0.80% for all three winning — an implied figure that includes each price’s margin, not a forecast; bookmakers may refuse or reprice related selections. Payouts use the exact, unrounded combined odds. Build your own with the parlay calculator.
Compare nearby odds
| Odds | Fractional | Decimal | Implied probability | $100 wins |
|---|---|---|---|---|
| +300 | 3/1 | 4.00 | 25.00% | $300.00 |
| 7/2 | 7/2 | 4.50 | 22.22% | $350.00 |
| +400 | 4/1 | 5.00 | 20.00% | $400.00 |
| 9/2 | 9/2 | 5.50 | 18.18% | $450.00 |
| +500 | 5/1 | 6.00 | 16.67% | $500.00 |
Full betting odds chart → · How betting odds work · 18+ — odds describe a price, not a prediction or a recommendation to bet.